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United States Department of Agriculture

Agricultural Research Service

Research Project: Development of Scab Resistant Soft Wheats Adapted to the Southeast

Location: National Programs

Project Number: 0500-00053-003-93-G
Project Type: Grant

Start Date: Jun 21, 2014
End Date: Jun 20, 2018

Project 1 - Enhancement of Scab Resistant Wheat Varieties Adapted to the Southeast: Enhance the development of high yielding soft red winter wheat (SRWW) varieties with improved FHB resistance and end-use quality, to generate populations for marker assisted selection with QTL associated with both native and exotic FHB resistance, and to introgress two or more known FHB resistance QTL into adapted SRWW background by using marker assisted selection. Project 2 - Developing Doubled Haploids to Expedite Variety Development in SRWW: Develop cultivars and readily available superior parental lines having gene Fhb1 and other validated QTL derived from exotic and native resistance sources.

Project 1: A combination of backcrossing and three-way crosses will be employed using molecular markers to expedite the selection process. Four-way crosses will also be made to add resistance from both parents. Cooperative evaluation of nurseries including the Southern Uniform Scab, the Uniform Southern Wheat, and the GA state performance trial, and FHB double-haploid lines will be evaluated in the misted, inoculated field nursery at Griffin, GA. Additional phenotypic data on FHB resistance will be collected from both native and exotic resistant sources to help us elucidate the type of resistance. Project 2: Doubled haploids (DH) allow quick introgression of resistance genes and can significantly shorten variety development time. We plan to expand the use of this technique for the whole Southern SRWW region by the coordinated development of at least five breeding populations per year through DH production followed by collaborative genotyping and phenotyping across the region once the DH lines are developed and seed is increased for testing.

Last Modified: 10/16/2017
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