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United States Department of Agriculture

Agricultural Research Service

Research Project: Development of Fhb Resistant Wheat Genotypes Adapted to the Gulf Coast and Use of Dhs to Expedite Project Number: 0500-00053-003-87
Project Type: Grant

Start Date: Jun 01, 2014
End Date: May 31, 2015

Objective:
Project 1 - Development of FHB Resistant Wheat Genotypes Adapted to the Gulf Coast: 1) to develop and release disease resistant, high-yielding wheat varieties adapted to the Gulf Coast region that are FHB resistant and contribute to reduced DON in export grain; 2) to increase efficiency of coordinated breeding programs through development of marker populations, collaborative phenotyping of populations for marker development, and introgression of useful genes, and 3) to evaluate varieties and advanced breeding lines in the USSN, statewide variety trials, and other regional nurseries to determine FHB reaction and provide that information to growers and breeders. 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.

Approach:
Project 1: The USFHBN regional nursery, entries in the statewide variety trials, and all advanced LSUAC breeding lines will be evaluated in northeast and south central Louisiana under controlled field conditions with corn/sorghum-based inoculation and timed misting; and in the scab-prone rice region of southwest Louisiana without misting. Two replications of ‘headrows’ in a RCBD will be grown at each location. Data on heading date, foliar diseases, and FHB will be collected from these trails and samples will be submitted for toxin analysis. Several replicated yield trials (AR and LSU trials) non-replicated observation yield trials will be conducted at two locations for advanced lines derived from FHB-specific crosses. All entries in these trials will be also evaluated in misted, inoculated nurseries at three locations and tested for the presence of major QTL for FHB 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: 10/22/2014
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