Progress 07/03/01 to 08/31/05
Outputs
4d Progress report. This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Tennessee. Additional details of research can be found in the report of the parent CRIS project 3625-21000-047-00D, "Germplasm Enhancement of Maize Project (GEM)." This project relates to the primary objectives of the parent project which includes the evaluation and development of improved populations and inbred lines from exotic germplasm. This is the final report of the project that concluded on 8/31/05. The University of Tennessee corn breeding project has participated in the GEM project since 1996. Our objective is to incorporate GEM germplasm into adapted regional elite germplasm, with emphasis on developing white corn germplasm. Topcrosses of GEM lines to adapted germplasm are evaluated in yield trials each year. The GEM lines which produce high yielding hybrids are selected for incorporation into breeding projects
to develop new parent lines. These parent lines can be used by other corn breeders and geneticists for targeted improvement programs. We have collaborated with the GEM project for the Southern U.S., coordinated by North Carolina State University (NCSU). In 2005 we are cooperating in 30 GEM yield trials, evaluating 1822 corn hybrids produced at NCSU. Data from these trials will be submitted to NCSU for incorporation into a comprehensive report. The best GEM lines based on topcross performance will be selected for further evaluation and incorporation into breeding projects. The following GEM lines identified in earlier trials were crossed to Tennessee lines in 2005: DK212T N11 F1S3 2326b-14-394-B DK212T N11 F2S3 7431-03-3-B PE1 N16 F2S4 CR341-B-12-B-B Pas14 S21 F1S3 C608-1-5-B DK888 N11 F1S3 2141-2-34-B H6141-11/96 CHS775N19F1S3 7384-02/96 CHS775N19F1S3 2405-010/99 CHS775N19F1S3 1311-01/97 CHS775N19F1S3 1312-01/97 CHS775N19F1S3 2410-003/99 SCRGp3N14F2S3 1415-01/97
DK888S11F2S3 1415-06/97 DK888S11F2S3 In addition to the above lines, crosses of Tennessee germplasm to GEM lines were made in 1999, 2000, 2001, and 2004. Selections from these crosses have been advanced by inbreeding and selection, and are being entered into yield trials as new experimental hybrids. In 2005 we have 225 nursery rows of GEM material for crossing, inbreeding and selection. GEM lines have been performing very well in Tennessee trials. Results from 2004 trials over 3 locations (Knoxville, Milan, and Spring Hill) identified GEM lines derived from Cr1-172, 2086-1/96, 2201-1/96, and 7541-10, that have superior combining ability (equivalent to check means) with the Tennessee lines, T270, T272, T171, and T175.
Impacts
(N/A)
Publications
|
Progress 10/01/03 to 09/30/04
Outputs
4. What were the most significant accomplishments this past year? D. Progress Report. This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Tennessee. Additional details of research can be found in the report of the parent project 3625-21000-036-00D- ENHANCING AGRONOMIC AND VALUE-ADDED TRAITS OF CORN GERMPLASM. This project relates to the primary objectives of the parent project which includes the evaluation and development of improved populations and inbred lines from exotic germplasm. The University of Tennessee corn breeding project has participated in the GEM project since 1996. Our objective is to incorporate GEM germplasm into adapted regional elite germplasm, with emphasis on developing white corn germplasm. Topcrosses of GEM lines to adapted germplasm are evaluated in yield trials each year. The GEM lines which produce high yielding hybrids are selected for incorporation into breeding
projects to develop new parent lines. These parent lines can be used by other corn breeders and geneticists for targeted improvement programs. We have collaborated with the GEM project for the Southern U.S., coordinated by North Carolina State University (NCSU). In 2004 we are cooperating in 16 GEM yield trials, evaluating 891 corn hybrids produced at NCSU. Data from these trials will be submitted to NCSU for incorporation into a comprehensive report. The best GEM lines based on topcross performance will be selected for further evaluation and incorporation into breeding projects. The following GEM lines identified in earlier trials were crossed to Tennessee lines in 2004: DK212T N11 F2S2 7431-3-3 DK212T N11 F2S2 7431-3-22 DK212T N11 F2S2 7431-3-53 CHS775 N19 F1S3 1721-42-12-3 DK888 N11 F2S2 7451-3-1 In addition to the above lines, crosses of Tennessee germplasm to GEM lines were made in 1999, 2000, and 2001. Selections from these crosses have been advanced by inbreeding and
selection, and are being entered into yield trials as new experimental hybrids. In 2004 we have 377 nursery rows of GEM material for crossing, inbreeding and selection. GEM lines have been performing very well in Tennessee trials. Results from 2003 trials over 3 locations (Knoxville, Milan, and Spring Hill) identified GEM lines derived from PASCO14, GUAT209, and CHIS462 that had superior combining ability (equivalent to check means) with the Tennessee lines, T270 and/or T272.
Impacts
(N/A)
Publications
|
|