Progress 06/01/04 to 09/30/07
Outputs
Progress Report Objectives (from AD-416) The proposed research will: 1) evaluate existing levels of genetic diversity in Arabidopsis ecotypes for tolerance to elevated temperatures; 2) identify a sensitive and a resistant ecotype; 3) develop an inbred population from these two ecotypes; and 4) map QTLs for heat tolerance. Approach (from AD-416) Sensitivity to elevated temperatures limits crop yields, especially in the Southern High Plains. Knowledge is needed about the mechanism(s) that plants use to prevent injury from the high temperatures. This study will identify natural genetic diversity for heat tolerance and will use this information to create an inbred population for use in mapping QTLs for heat tolerance. Significant Activities that Support Special Target Populations This report serves to document research conducted under a grant between ARS and Baylor University. Additional details of research can be found in the report for the parent CRIS 6208-21000-016-00D Characterization and Enhancement of Plant Resistance to Water-Deficit and Thermal Stresses. The research progressed on the development of an inbred population of Arabidopsis exhibiting a broad range of heat tolerances. Scientists within the Plant Stress and Germplasm Development Unit in Lubbock, Texas, evaluated 350 Arabidopsis ecotypes for heat tolerance and undertook the development of a recombinant inbred population arising from a heat tolerant and a heat sensitive ecotype. This study will aid in the identification of genes contributing to heat tolerance. ADODR is in regular contact with cooperator via e-mail, phone, and face- to-face contacts.
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Progress 10/01/05 to 09/30/06
Outputs
Progress Report 4d Progress report. This report serves to document research conducted under a grant between ARS and Baylor University. Additional details of research can be found in the report for the parent CRIS 6208-21000-016-00D Characterization and Enhancement of Plant Resistance to Water-Deficit and Thermal Stresses. The research evaluated a mutation in cotton that results in enhanced branching. Scientists within the Plant Stress and Germplasm Development Unit in Lubbock, Texas, evaluated the growth, percent branching, and yield development of the mutant cotton and non-mutant controls. The benefits and drawbacks of the mutation have been identified.
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Progress 10/01/04 to 09/30/05
Outputs
4d Progress report. This report serves to document research conducted under a grant between ARS and Baylor University. Additional details of research can be found in the report for the parent CRIS 6208-21000-012-00D Plant Response to Water-Deficit and Thermal Stresses. The research evaluated existing levels of genetic diversity in approximately 300 Arabidopsis ecotypes for tolerance to elevated temperatures. Scientists within the Plant Stress and Germplasm Development Unit in Lubbock, Texas, identified high temperature sensitive and resistant ecotypes. The development of an inbred population from two ecotypes was intiated.
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