Source: LOUISIANA STATE UNIVERSITY submitted to NRP
GENETIC IMPROVEMENT OF RICE FOR LOUISIANA PRODUCTION
Sponsoring Institution
State Agricultural Experiment Station
Project Status
COMPLETE
Funding Source
STATE
Reporting Frequency
Annual
Accession No.
0205970
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
(N/A)
Project Start Date
Jan 1, 2006
Project End Date
Dec 31, 2011
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
LOUISIANA STATE UNIVERSITY
202 HIMES HALL
BATON ROUGE,LA 70803-0100
Performing Department
RICE RESEARCH STATION
Non Technical Summary
The development of new, superior rice varieties can have positive effects on the economic viability of the Louisiana rice industry. This project develops new improved rice varieties for Louisiana and the Gulf South region.
Animal Health Component
100%
Research Effort Categories
Basic
(N/A)
Applied
100%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2041530108040%
2111530108020%
2121530108020%
2131530108020%
Knowledge Area
212 - Pathogens and Nematodes Affecting Plants; 204 - Plant Product Quality and Utility (Preharvest); 211 - Insects, Mites, and Other Arthropods Affecting Plants; 213 - Weeds Affecting Plants;

Subject Of Investigation
1530 - Rice;

Field Of Science
1080 - Genetics;
Goals / Objectives
To develop superior conventional and Clearfield varieties for Louisiana and Gulf South production with emphasis on improvements in yield, quality, disease resistance, seedling vigor, earliness, ratoon potential, lodging resistance, environmental stability, and herbicide and insect tolerance. To develop non-conventional rice varieties incorporating traits such as herbicide resistance, insect resistance, disease resistance, quality characteristics, and other important traits through genetic engineering and mutation breeding. To conduct related research with emphasis on rice varietal improvement, adaptability, and uniformity.
Project Methods
Develop new genetic populations in all commercial classes of rice by artificial hybridization, mutagenesis, and biotechnology. Advance these populations while selecting for desirable characteristics. Evaluate advanced selections in replicated tests over years and locations to identify superior lines. Increase superior lines through the Rice Research Station Foundation Seed Program. Conduct concurrent studies related to varietal improvement.

Progress 01/01/06 to 12/31/11

Outputs
OUTPUTS: One new rice variety (Mercentau) was released in 2011 and will be available for 2012 production. It is an early long-grain conventional line that will be planted primarily for seed production in 2012. This project generated 16 outputs in the form of 12 presentations at Louisiana grower meetings, one at a Missouri grower meeting, one at an Arkansas grower meeting, and two presentations at national grower meetings. Six other outputs as regional field day presentations were delivered. Four newsletter articles and 12 popular press articles were published. PARTICIPANTS: Steve Linscombe, (PI), LSU AgCenter. TARGET AUDIENCES: Rice Product Industry PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
The Rice Breeding project at the LSU AgCenter's Rice Research Station released 10 new varieties during the period 2000-2005. These included one short grain (Pirogue), two medium grains (Earl and Jupiter), two long grains (Cheniere and Trenasse), four Clearfield long grains (CL121, CL131, CL141, and CL161), and one crawfish forage variety (Ecrevisse). These varieties were planted on several million acres in the southern U.S. rice production region and increased rice profitability. Cheniere provided a quality and disease resistance advantage over Cocodrie, which is the predominant variety in the region. Trenasse is a very early maturing variety that allows for more efficient use of combines and drying facilities. It also provides a ratoon cropping advantage over later maturing varieties. The Clearfield varieties allowed for the use of the Clearfield production system, which provided the ability to selectively eliminate red rice in a rice field. In addition to yield and quality improvements, this technology allowed for changes in management systems that have improved water quality in rice growing regions. The release of Pirogue short-grain rice addressed the needs of a specific export market. Prior to this time, short-grain paddy rice had been imported from California. Ecrevisse is a variety developed specifically for a crawfish monoculture system. It has several advantages over conventional varieties, including more biomass production, greater cold tolerance, and much better spring regrowth. The variety releases have improved the economic viability of rice production in the southern U.S. rice growing region. In addition, the Clearfield varieties have allowed expansion of the use of a herbicide technology which has improved weed control and environmental safety.

Publications

  • Sha, X.Y., Linscombe, S.D., Jodari, F., Chu, Q.R., Groth, D.E., Blanche, S.B., Harrell, D.L., White, L.M., Oard, J.H., Chen, M.H., Theunissen, S.J., and Henry, B.J. 2011. Registration of 'Jazzman' aromatic long-grain rice. J. Plant Registrations 5:304-308.
  • Blanche, S.B., Sha, X., Harrell, D.L., Groth, D.E., Bearb, K.F., White, L.M., and Linscombe, S.D. 2011. Registration of 'CL151' rice. J. Plant Registrations 5:177-180.
  • Sha, X.Y. and Linscombe, S.D. 2011. Jazzman rice: development of a Jasmine-type rice variety for the southern United States. Louisiana Agriculture 54(3):6-8.
  • Sha, X.Y., Linscombe, S.D., Li, W., Theunissen, S.J., and Henry, B.J. 2010. Development of improved long-grain, special purpose, and hybrid rice varieties for Louisiana. p. 31-48. In 102nd Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2011).
  • Li, W., Sha, X.Y., Linscombe, S.D., Groth, D.E., Oard, J., Theunissen, S.J., and Henry, B.J. 2010. Development of hybrid rice for Louisiana. p. 49-50. In 102nd Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2011).
  • Linscombe, S.D., Sha, X.Y., Blanche, S.B., Bearb, K.F., Dilly Jr., R.R., Theunissen, B.W., Theunissen, S.J., Zaunbrecher, R.E., Henry, B.J., and Hoffpauir, H.L. 2011. Genetic improvement of rice for Louisiana production. p. 3-30. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter.
  • Oard, J.H., Groth, D., Linscombe, S.D., Sha, X., Li, W., Silva, J., Sanabria, Y., Galam, D., and de Guzman, C. 2011. Rice genetics and germplasm development. p. 51. In 102nd Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter.
  • Linscombe, S.D. and Sha, X.Y. 2011. Bred rice from Louisiana. Rice Today 10(2):38-39. International Rice Research Institute, Philippines.


Progress 01/01/10 to 12/31/10

Outputs
OUTPUTS: Two new rice varieties were released in 2010 and will be available for 2011 production. CL152 is an early long-grain line that will be planted primarily for seed production in 2011. Caffey is a conventional semidwarf medium-grain variety. This project generated 18 outputs in the form of 12 presentations at Louisiana grower meetings, one at a Texas grower meeting, two at Arkansas grower meetings, one at a Missouri grower meeting and two presentations at national grower meetings. Six other outputs in the form of regional field day presentations were also delivered. Four newsletter articles and 12 popular press articles were also published in 2010. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Nothing significant to report during this reporting period. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
Rice variety development activities included over 250 crosses, 225 F2 populations and over 80,000 progeny rows for selection or purification. Yield, milling and agronomic performance trials were conducted at the Rice Research Station, as well as at six off-station locations throughout the rice growing regions of Louisiana. Two new varieties (CL152 and Caffey) were also released and will be grown primarily for seed in 2011. CL152 is a high yielding lodging resistant Clearfield long grain with excellent grain quality. Caffey is a very high yielding early medium grain with excellent grain quality. A date of planting study (eight planting dates) was conducted to evaluate the effect of planting dates on yield, quality and agronomic performance of 12 varieties or experimental lines.

Publications

  • Utomo, H.S., Linscombe, S.D., Groth, D.E., Wenefrida, I., and Blanche, S.B. 2010. Molecular marker: A tool in rice variety development. Louisiana Agriculture 53(1):20-22.
  • Linscombe, S.D., Sha, X.Y., Blanche, S.B., Bearb, K.F., Dilly Jr., R.R., Theunissen, B.W., Theunissen, S.J., Henry, B.J., Hoffpauir, H.L., and Leonards, L.E. 2009. Genetic improvement of rice for Louisiana production. p. 3-34. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Linscombe, S.D., Blanche, S.B., Sha, X.Y., Bearb, K.F., Theunissen, B.W., Theunissen, S.J., Dilly Jr., R.R., Henry, B.J., and Hoffpauir, H.L. 2009. Clearfield experimental lines. p. 35-47. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Blanche, S.B., Linscombe, S.D., Sha, X.Y., Dilly Jr., R.R., Bearb, K.F., Theunissen, B.W., Theunissen, S.J., Hoffpauir, H.L., and Henry, B.J. 2009. Medium-grain rice breeding. p. 48-52. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Li, W., Sha, X., Linscombe, S., Groth, D., Oard, J., Theunissen, S., and Henry, B. 2009. Development of hybrid rice for Louisiana. p. 69-70. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Oard, J.H., Groth, D., Linscombe, S.D., Sha, X., Li, W., Ordonez, S., and Silva, J. 2009. Rice genetics and germplasm development. p. 71-72. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Sha, X.Y., Linscombe, S.D., Theunissen, S.J., and Henry, B.J. 2009. Development of improved long-grain and special purpose rice varieties for Louisiana. p. 53-68. In 101st Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2010).
  • Linscombe, S.D. 2010. LSU AgCenter releases new rice varieties. Louisiana Farm and Ranch 6(12):6-7.
  • Linscombe, S.D. 2010. Rice breeding research recap-2010. Louisiana Farm and Ranch 6(11):6-7.
  • Linscombe, S.D. 2010. 2010 Louisiana rice crop - A mixed bag / South Carolina sojurn. Louisiana Farm and Ranch 6(10):6-7.
  • Linscombe, S.D. 2010. Ratoon crop rice production. Louisiana Farm and Ranch 6(9):12-13.
  • Linscombe, S.D. 2010. Rice research priorities are continual moving targets. Louisiana Farm and Ranch 6(8):6-7.
  • Linscombe, S.D. 2010. Highlights from the 2010 Rice Research Station Field Day. Louisiana Farm and Ranch 6(7):6-7.
  • Linscombe, S.D. 2010. Sustainable agriculture - Part 2. Louisiana Farm and Ranch 6(6):6-7.
  • Linscombe, S.D. 2010. Sustainable agriculture - Part 1. Louisiana Farm and Ranch 6(5):6-7.
  • Linscombe, S.D. 2010. Jazzman rice available in 2010. Louisiana Farm and Ranch 6(4):6-7.
  • Linscombe, S.D. 2010. Rice variety development - Looking to the future. Louisiana Farm and Ranch 6(3):6-8.
  • Linscombe, S.D. 2010. Rice variety selection, seeding dates and seeding rates. Louisiana Farm and Ranch 6(2):6-7.
  • Linscombe, S.D. 2010. Knowledge of rice growth stages important. Louisiana Farm and Ranch 6(1):6,9.
  • Sha, X.Y., Linscombe, S.D., Blanche, S.B., and Groth, D.E. 2009. Yield advantage of hybrid rice over conventional and Clearfield long-grain rice in the southern United States. p. 687-693. In Xie F. and Hardy B. (eds.) 2009. Accelerating hybrid rice development. Los Banos Philippines): International Rice Research Institute. 698 p.
  • Li, W., Sha, X., Linscombe, S.D., Groth, D.E., Oard, J.H., Theunissen, S.J. and Henry, B.J. 2010. Current status and perspective in hybrid rice development at the LSU AgCenter Rice Research Station. Proc. Rice Tech. Wrkg. Grp. 33:54. (Feb. 22-25, Biloxi, MS)
  • Li, W., Oard, J., Ordonez, S., Sha, X., and Linscombe, S. 2010. Development of U.S. hybrid rice germplasm. Proc. Rice Tech. Wrkg. Grp. 33:66. (Feb. 22-25, Biloxi, MS)
  • Utomo, H.S., Wenefrida, I., Groth, D.E., and Linscombe, S.D. 2010. Molecular characteristics of high grain protein content and potential marker development. Proc. Rice Tech. Wrkg. Grp. 33:49. (Feb. 22-25, Biloxi, MS)
  • Sha, X., Linscombe, S.D., Blanche, S.B., Groth, D.E., Harrell, D., White, L.M., and Theunissen, S.J. 2010. Registration of 'Neptune' rice. Journal of Plant Registrations 4:179-182.
  • Sha, X.Y. and Linscombe, S.D. 2010. Have we exhausted the genetic variation for further improving rice yield in U.S. rice The 3rd International Rice Congress. Nov. 8-11, 2010. Hanoi, Vietnam. In: CD and On-line publication.
  • Sha, X., Linscombe, S.D., and Chu, Q.R. 2010. Expanding genetic diversity in southern long-grain rice by incorporating the anther culture derived germplasm. p. 57. In: Proceedings of the 32nd Rice Technical Working Group. Feb. 22-25. Biloxi, MS.


Progress 01/01/09 to 12/31/09

Outputs
OUTPUTS: Two new Clearfield rice varieties were released in 2009 and will be available for 2010 production. CL111 is a very early long-grain line that will be planted on approximately 100,000 acres in the mid-south in 2010. CL261 is a short stature medium-grain Clearfield line that will be produced on approximately 12,000 acres in 2010. This project generated 10 outputs in the form of seven presentations at Louisiana grower meetings, one at an Arkansas grower meeting and two presentations at national grower meetings. Six other outputs in the form of regional field day presentations were also delivered. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Target audiences for this project include rice breeders, crop producers, consultants and agronomy professionals. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
Rice variety development activities included over 300 crosses, 250 F2 populations and over 80,000 progeny rows for selection or purification. Yield, milling and agronomic performance trials were conducted at the Rice Research Station, as well as at five off-station locations throughout the rice growing regions of Louisiana. Two new Clearfield varieties (CL111 and CL261) were also released and were in fast track seed increase in 2009. CL111 has shown a significant earliness advantage over current Clearfield long grains. CL261 will be the first medium-grain variety available for use with the Clearfield system. A date of planting study (eight planting dates) was conducted to evaluate the effect of planting dates on yield, quality and agronomic performance of 15 varieties or experimental lines.

Publications

  • Utomo, H.S., Wenefrida, I., Blanche, S.B., and Linscombe, S.D. 2009. Low-cost method for streamlining marker-assisted selection and breeding line development in rice (Oryza sativa L.). Int. J. Genet. Molec. Biol. 1(4):64-74.
  • Blanche, S.B., Linscombe, S.D., Sha, X., Bearb, K., Groth, D.E., White, L., and Harrell, D. 2009. Registration of 'Catahoula' rice. J. Plant Reg. 3(2):146-149.
  • Blanche, S.B., Sha, X., Linscombe, S.D., Groth, D.E., and Dilly, Jr., R.R. 2009. Visual estimation of rice (Oryza sativa L.) grain yield in multiple environments in Louisiana. J. New Seeds 10(2):74-87.
  • Blanche, S.B. and Linscombe, S.D. 2009. Stability of rice grain and whole kernel milling yield is affected by cultivar and date of planting. Agron J. 101:522-528.
  • Saichuk, J.K., Blanche, S.B., Courville, B., Harrell, D., Groth, D.E., Hollier, C.A., Hummel, N., Linscombe, S.D., Rush, M.C., Sha, X., Stout, M.J., Webster, E.P., and White, L.M. 2009. Rice varieties and management tips 2010. La. Coop. Ext. Pub. 2270. LSU AgCenter, Baton Rouge, LA.
  • Blanche, S.B. and Linscombe, S.B. 2009. New methods to evaluate rice planting date studies. Louisiana Agriculture, Winter 2010. (Submitted).
  • Utomo, H.S., Blanche, S.B., Sha, X., Groth, D.E., and Linscombe, S.D. 2009. Molecular markers, an additional tool in rice cultivar development. Louisiana Agriculture. (Accepted).
  • Sha, X., Linscombe, S.D., Blanche, S.B., and Groth, D.E. Field performance of selected hybrid rice at five Louisiana locations. 2009 ASA-CSSA-SSSA International Annual Meetings, Nov.1-5, Pittsburgh, PA (Submitted).
  • Blanche, S.B. and Linscombe, S.D. 2009. Stability of rice grain and whole kernel milling yield is affected by cultivar and date of planting. 2009 Southern Branch ASA-CSSA-SSSA Ann. Mtg. Feb. 1-3, Atlanta, GA.
  • Saichuk, J.K., Schultz, B., Hollier, C.A., Groth, D.E., Harrell, D.L., Webster, E.P., White, L.M., Rush, M.C., Salassi, M., Stout, M.J., Levy, Jr., R.J., Blanche, S., Linscombe, S.D., Reagan, T.E., Sha, X., Hummel, N.. 2009. Rice production handbook. Publ. 2321. Louisiana State Univ. AgCenter, Baton Rouge.
  • Blanche, S.B., Linscombe, S.D., Sha, X.Y., Anderson, G.A., Zaunbrecher, Q.J., Bearb, K.F., Conner, C.A., Theunissen, B.T., Theunissen, S.J., and Hoffpauir, H.L. 2009. Medium-grain rice breeding, 2008. In 100th Annual Research Report, Rice Research Station, La. Agric. Exp. Stn., LSU Agricultural Center, 100:46-50.
  • S.D. Linscombe, Sha, X.Y., Blanche, S.B., Bearb, K.F., Conner, C.A., Theunissen, B.T., Theunissen, S.J., Anderson, G.A., Henry, B.J., and Hoffpauir, H.L. 2009. Rice breeding: Genetic improvement of rice for Louisiana production, 2008. In 100th Annual Research Report, Rice Research Station, La. Agric. Exp. Stn., LSU Agricultural Center, 100:3-36.
  • Sha, X.Y., Linscombe, S.D., Blanche, S.B., Theunissen, S.J., and Henry, B.J. 2008. Development of improved long-grain and special purpose rice varieties for Louisiana. Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter 100:51-62. (Published in 2009).
  • Oard, J.H., Groth, D., Linscombe, S.D., Sha, X., Ordonez, S., and Silva, J. 2008. Rice genetics and germplasm development. p. 63-65. In 100th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2009).
  • Rush, M.C., Groth, D.E., Sha, X.Y., Nandakumar, R., Nyanpane, N.P., and Linscombe, S.D. 2008. Disease management in rice. p. 250-257. In 100th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2009).
  • Linscombe, S.D. 2009. Jazzman - A new specialty rice variety. La. Farm and Ranch, January.
  • Linscombe, S.D. 2009. Rice variety selection - An important first step/Dermacor X-100. La. Farm and Ranch, February.
  • Linscombe, S.D. 2009. Minimizing inputs typically does not pay in Louisiana rice production. La. Farm and Ranch, March.
  • Linscombe, S.D. 2009. Medium-grain rice acreage up in Louisiana in 2009. La. Farm and Ranch, April.
  • Linscombe, S.D. 2009. Hybrid rice research at the Rice Research Station. La. Farm and Ranch, May.
  • Linscombe, S.D. 2009. Variety development - A key function of the Rice Research Station. La. Farm and Ranch, June.
  • Linscombe, S.D. 2009. Highlights from the 2009 Rice Research Station Centennial Field Day. La. Farm and Ranch, July.
  • Linscombe, S.D. 2009. Rice Is not just rice. La. Farm and Ranch, August.
  • Linscombe, S.D. 2009. Breeding for new Clearfield rice varieties. La. Farm and Ranch, September.
  • Linscombe, S.D. 2009. Rice industry holds three key winter meetings. La. Farm and Ranch, October.
  • Linscombe, S.D. 2009. LSU AgCenter releases two new Clearfield rice varieties. La. Farm and Ranch, November.
  • Linscombe, S.D. 2009. Rice and crawfish production provides essential wildlife habitat. La. Farm and Ranch, December.


Progress 01/01/08 to 12/31/08

Outputs
OUTPUTS: A long-grain Clearfield rice variety, CL151, was released in 2008 and will be available for 2009 production. It was in an expedited seed increase program and will likely be planted on approximately 500,000 acres in the southern U.S. in 2009. This project generated 10 outputs in the form of seven presentations at Louisiana grower meetings, one at an Arkansas grower meeting and two presentations at national grower meetings. Six other outputs in the form of regional field day presentations were also delivered. Four extension publications, four newsletter articles, and 14 popular press articles were published in 2008. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Target audiences for this project include rice breeders, crop producers, consultants and agronomy professionals. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
Rice variety development activities included over 450 crosses, 400 F2 populations and over 80,000 progeny rows for selection or purification. Yield, milling and agronomic performance trials were conducted at the Rice Research Station, as well as at six off-station locations throughout the rice growing regions of Louisiana. A new Clearfield variety (CL151) was also released and was in fast track seed increase in 2008. CL151 has shown a significant yield advantage over the currently available Clearfield varieties. A Clearfield medium-grain experimental line is currently being increased. This line shows good potential for release and, if so, will be the first medium grain available for use with Clearfield technology. The project participated in the regional RiceCAP project, which is focused on fine-tuning the use of marker-assisted selection in rice breeding. A date of planting study (eight planting dates) was conducted to evaluate the effect of planting dates on yield, quality and agronomic performance of 12 varieties or experimental lines.

Publications

  • Saichuk, J.K., S.B. Blanche, E. Eskew, D. Harrell, D.E. Groth, C.A. Hollier, N. Hummel, S.D. Linscombe, M.C. Rush, X. Sha, M.J. Stout, E.P. Webster, and L.M. White. 2008. Rice varieties and management tips 2009. La. Coop. Ext. Pub. 2270. LSU AgCenter, Baton Rouge, LA.
  • Blanche, S.B., and S.D. Linscombe. 2008. Stability of rice grain and whole kernel milling yield is affected by cultivar and date of planting. 2009 Southern Branch ASA-CSSA-SSSA Ann. Mtg. 1-3 Feb., Atlanta, GA.
  • S.D. Linscombe, X.Y. Sha, S.B. Blanche, K.F. Bearb, C.A. Conner, B.T. Theunissen, S.J. Theunissen, G.A. Anderson, B.J. Henry, and H.L. Hoffpauir. 2008. Rice Breeding: Genetic Improvement of Rice for Louisiana Production, 2007. In 99th Annual Research Report, Rice Research Station, La. Agric. Exp. Stn., LSU Agricultural Center, 99:3-82.
  • Linscombe, S.D. 2008. Foundation seed rice production essential for the rice industry. La. Farm and Ranch, December.
  • Linscombe, S.D. 2008. China - An emerging superpower. La. Farm and Ranch, November.
  • Groth, D.E. and Linscombe, S.D. 2008. Effects of rice cultivar resistance level and fungicide applications on rice sheath blight, yield, and quality and its implications on varietal screening. Proc. Rice Tech. Wrkg. Grp. 32:87.
  • Utomo, H.S., Linscombe, S.D., Groth, D.E., and Sha, X. 2008. Field performance of marker-assisted derived elite blast lines. Proc. 32nd Rice Tech. Wrkg. Grp. San Diego, CA. 32:51-52.
  • Linscombe, S.D. 2008. Reflections on the 2008 Louisiana rice crop. La. Farm and Ranch, October.
  • Linscombe, S.D. 2008. Gustav will have a major impact on the 2008 Louisiana rice crop. La. Farm and Ranch, September.
  • Linscombe, S.D. 2008. Improving technology for coastal wetlands restoration. La. Farm and Ranch, August.
  • Linscombe, S.D. 2008. Highlights of the 2008 Rice Research Station Field Day. La. Farm and Ranch, July.
  • Linscombe, S.D. 2008. Midseason is a critical time in rice production. La. Farm and Ranch, June.
  • Linscombe, S.D. 2008. Off-station trials important to rice industry. La. Farm and Ranch, April.
  • Linscombe, S.D. 2008. Rice planting dates and new insecticides. La. Farm and Ranch, March.
  • Linscombe, S.D. 2008. Rice planting soon upon us. La. Farm and Ranch, February.
  • Linscombe, S.D. 2008. LSU AgCenter releases new rice varieties for 2008. La. Farm and Ranch, January.


Progress 01/01/07 to 12/31/07

Outputs
OUTPUTS: A long-grain conventional rice variety, Catahoula, was released in 2007 and will be available for 2008 production. This project generated 10 outputs in the form of eight presentations at grower meetings given at various locations across the state of Louisiana and two presentations at national grower meetings. Six other outputs in the form of regional field day presentations were also delivered. In addition, six scientific meeting abstracts were submitted and presentations will be given during the 2008 Rice Technical Working Group biannual meeting. Four extension publications and four news letter articles were also published in 2007. PARTICIPANTS: Steve Linscombe, PI; S.B. Blanche, X. Sha, rice breeders; K. Bearb, C. Conner, B. Theunissen, research associates; H. Hoffpauir, Research Farm Speciailist; L. Leonards, Research Farm Assistant (all at the Rice Research Station) TARGET AUDIENCES: Target audiences for this project include crop producers, consultants and agronomy professionals.

Impacts
Rice variety development activities included over 500 crosses, 450 F2 populations and over 100,000 progeny rows for selection or purification. Yield, milling and agronomic performance trials were conducted at the Rice Research Station, as well as at seven off-station locations throughout the rice growing regions of Louisiana. A new long-grain rice variety (Catahoula) was released for production. Catahoula has displayed higher yield potential and better disease resistance than Cocodrie, the predominate long-grain variety in the southern U.S today. A new Clearfield variety (CL151) was also released and is currently in fast track seed increase. CL151 has shown a significant yield advantage over the currently available Clearfield varieties. A Clearfield medium-grain experimental line is currently being increased. This line shows good potential for release and, if so, will be the first medium grain available for use with Clearfield technology. The project participated in the regional RiceCAP project, which is focused on fine-tuning the use of marker-assisted selection in rice breeding. The MY2 population (which was developed by this project) was grown and evaluated for the second growing season in 2007. A date of planting study (eight planting dates) was conducted to evaluate the effect of planting dates on yield, quality and agronomic performance of 15 varieties, hybrids, or experimental lines.

Publications

  • Sha, X.Y. and Linscombe, S.D. 2007. Planting date affects grain and milling yields of water-seeded Clearfield rice. Agronomy Journal 99:1143-1150.
  • Sha, X., Linscombe, S.D., and Groth, D.E. 2007. Field evaluation of Imidazolinone-tolerant Clearfield rice (Oryza sativa) at nine Louisiana locations. Crop Science 47:1177-1185.
  • Groth, D.E., Linscombe, S.D., and Sha, X. 2007. Registration of two disease-resistant germplasm lines of rice. Journal of Plant Registrations 1:63.
  • Utomo, H., Linscombe, S.D., and Sha, X.Y. 2007. Incorporation of DNA markers to develop improved southern rice breeding lines. Poster # 81-4. The 52nd Annual Meeting of the Crop Science Society of America. Nov. 4-8. New Orleans, LA.
  • Wenefrida, I., H.S. Utomo, and S.D. Linscombe. 2007. Amino acid profiles and molecular characteristics of high protein rice lines. Proc. ASA-CSSA-SSSA 2007 International Annual Meetings. New Orleans, LA. p. 67.
  • Linscombe, S.D., Sha, X.Y., Bearb, K.F., Conner, C.A., Theunissen, B.W., Henry, B.J., Hoffpauir, H.L., and Jin, X. 2006. Genetic improvement of rice for Louisiana production. 98th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 98:3-44. (Published in 2007).
  • Sha, X.Y., Chu, Q.R., and Linscombe, S.D. 2006. Pedigrees of anther culture (AC)-related crosses. p. 62-78. In 98th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2007).
  • Sha, X.Y., Linscombe, S.D., and Theunissen, S.J. 2006. Development of improved long-grain and specialty purpose rice varieties for Louisiana. p. 51-61. In 98th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2007).
  • Utomo, H.S., Linscombe, S.D., and Sha, X. 2006. Marker-assisted breeding: Incorporation of DNA markers to develop improved breeding lines. p. 82-85. In 98th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2007).
  • Blanche, S.B., Linscombe, S.D., Sha, X.Y., Anderson, G.E., Bearb, K.F., Conner, C.A., Theunissen, B.W., Theunissen, S.J., and Hoffpauir, H.L. 2006. Medium-grain rice breeding. p. 45-50. In 98th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2007).
  • Oard, J.H., Groth, D., Linscombe, S.D., Sha, X., Zhang, N., Kadaru, S., Ordonez, S., and Zhang, W. 2006. Rice genetics and germplasm development. p. 79-81. In 98th Annual Research Report. Rice Research Station, La. Agri. Exp. Stn., LSU AgCenter. (Published in 2007).


Progress 01/01/06 to 12/31/06

Outputs
The Rice Breeding Project made over 800 new crosses and backcrosses for varietal improvement in 2006. Four hundred thirty three F1 populations were produced and 401 F2 populations were grown for selection. The breeding nursery contained over 98,000 panicle rows for advancement, selection, and purification. Yield and quality testing included the Uniform Regional Rice Nursery, the Commercial Advanced tests (seven locations), and the Preliminary yield tests (725 lines in early evaluation). The project released two new varieties for production in 2005. The project released one new variety for 2007 production. CL151 is a semidwarf long-grain variety for use in the Clearfield production system. The new variety has consistently shown a significant yield advantage over currently available Clearfield lines. Related research includes date of planting studies, effect of harvest moisture on milling yield studies, and herbicide tolerance research. The project is also conducting a number of cooperative studies as a participant in the multi-state RICECAP project that is aimed at developing useful molecular markers for future breeding advances in developing better milling quality and improved sheath blight resistance.

Impacts
The release of CL151 will offer an additional variety for use with the Clearfield system. The new variety offers a yield advantage to CL131 and CL161, the current varieties available for use in the Clearfield system. The new variety also has shown excellent lodging resistance and very good seedling vigor.

Publications

  • Linscombe, S.D., Sha, X.Y., Bearb, K., Chu, Q., Groth, D.E., White, L.M., Dunand, R.T., and Bollich, P.K. 2006. Registration of 'Cheniere' rice. Crop Science 46:1814-1815.
  • Linscombe, S.D, Sha, X.Y, Bond, J., Bearb, K., Rush, M.C., Chu, Q., Groth, D.E., White, L.M., and Dunand, R.T. 2006. Registration of 'Trenasse' rice. Crop Science 46:2318-2319.
  • Sha, X., Linscombe, S.D., Chu, Q., Groth, D.E., White, L.M., Bond, J., Dunand, R.T., and Utomo, H. 2006. Registration of 'Jupiter' rice. Crop Science 46:1811-1812.
  • Chu, Q.R., Linscombe, S.D., Rush, M.C., Groth, D.E., Oard, J., Sha, X., and Utomo, H.S. 2006. Registration of a doubled haploid mapping population of rice. Crop Science 46:1417.
  • Shao, Q., Rush, M.C., Linscombe, S.D., Groth, D.E., and Kang, M.S. 2006. Allelic analysis of bar gene from different rice transformation events. Journal of Crop Improvement 15:(1)33-49.
  • Shao, Q.M., Rush, M.C., Wu, M.S., Groth, D.E., Kang, M.S., and Linscombe, S.D. 2006. Transgene transfer to United States commercial rice cultivars via conventional breeding techniques. Journal of Crop Improvement 16(1)49-65.
  • Sha, X.Y., Theunissen, S.J., and Linscombe, S.D. 2006. Effects of planting date on grain dimensions and grain weight of selected rice varieties. Proc. Rice Technical Working Group, 31:146.
  • Sha, X.Y., Linscombe, S.D., and Theunissen, S.J. 2006. Breeding aromatic long-grain rice varieties for the southern United States. Proc. Rice Technical Working Group, 31:61.
  • Sha, X.Y. and Linscombe, S.D. 2006. Development of medium-grain rice varieties with high yield potential and superior quality for the southern United States. Proc. Rice Technical Working Group, 31:61.
  • Sha, X.Y., Linscombe, S.D., Conner, C.A., and Theunissen, S.J. 2006. Preliminary studies on effects of planting dates on seedling stand of water-seeded rice. Proc. Rice Technical Working Group, 31:163.
  • Blanche, S.B., Linscombe, S.D., and Sha, X.Y. 2006. Medium-grain rice breeding in Louisiana. Proc. Rice Technical Working Group, 31:41.
  • Utomo, H.S., Linscombe, S.D., and Sha, X.Y. 2006. Benefits and practical challenges in applying DNA markers into an actual rice breeding program. Proc. Rice Technical Working Group, 31:50-51.
  • Sha, X.Y., Chu, Q.R., Linscombe, S.D, Theunissen, S.J., and Jin, X. 2005. Development of elite southern U.S. long-grain rice varieties through both cross-breeding and the doubled haploid technology. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:88-96.(Published in 2006).
  • Sha, X.Y., Linscombe, S.D., Theunissen, S.J., Blanche, S.B., and Bearb, K.F. 2005. Medium-grain and specialty purpose rice breeding. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:78-87. (Published in 2006).
  • Linscombe, S.D., Sha, X.Y., Bearb, K.F., Conner, C.A., Theunissen, B.W., Henry, B.J., Hoffpauir, H.L., and Jin, X. 2005. Genetic improvement of rice for Louisiana production. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:3-38. (Published in 2006).
  • Linscombe, S.D., Sha, X.Y., Bearb, K.F., Conner, C.A., Theunissen, B.W., Henry, B.J., Hoffpauir, H.L., and Jin, X. 2005. Clearfield experimental lines. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:39-52. (Published in 2006).
  • Linscombe, S.D., Sha, X.Y., Bearb, K.F., Conner, C.A., Theunissen, B.W., Henry, B.J., Hoffpauir, H.L., and Jin, X. 2005. Liberty-linked experimental lines. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:53-73. (Published in 2006).
  • Linscombe, S.D., Sha, X.Y., Bearb, K.F., Conner, C.A., Theunissen, B.W., Henry, B.J., Hoffpauir, H.L., and Jin, X. 2005. Date of planting studies. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:74-77. (Published in 2006).
  • Sha, X.Y., Chu, Q.R., Linscombe, S.D, Theunissen, S.J., and Jin, X. 2006. Development of elite southern U.S. long-grain rice varieties through both cross-breeding and the doubled haploid technology. 97th Annual Research Report. Rice Research Station, Louisiana Agricultural Experiment Station, LSU AgCenter, 97:88-96.