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Title: Multi-environment quantitative trait loci analysis for resistance to stripe rust and cephalosporium stripe, in two recombinant inbred line populations

Author
item VAZQUEZ, DORLES - Oregon State University
item HEESACKER, A. - Oregon State University
item PETERSON, C. JAMES - Limagrain Cereal Seeds
item Chen, Xianming
item MUNDT, C. - Oregon State University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/30/2011
Publication Date: 6/13/2011
Citation: Vazquez, D.M., Heesacker, A., Peterson, C., Chen, X., Mundt, C. 2011. Multi-environment quantitative trait loci analysis for resistance to stripe rust and cephalosporium stripe, in two recombinant inbred line populations. Meeting Abstract. Pg 186 in Abstracts of BGRI Tech. Workshop.

Interpretive Summary:

Technical Abstract: Stripe rust (Puccinia striiformis) and Cephalosporium stripe (Cephalosporium gramineum) can cause severe loss of wheat (Triticum aestivum) yield and grain quality in the Pacific Northwest, USA. Favorable weather conditions and the appearance of new races are becoming an important factor for annual development of stripe rust disease in the area. Cephalosporium stripe can be a limiting factor in the adoption of conservation tillage practices and little is known about the inheritance of resistance. Two recombinant inbred lines (RILs) populations (Einstein x Tubbs and Tubbs x NSA 95-0995) weare assessed for quantitative trait loci (QTL) analysis toon stripe rust and Cephalosporium stripe. A linkage map whas been created for each population based on diversity array technology (DArT) and simple sequence repeat (SSR) markers. Field screenings for stripe rust were done in six environments under natural inoculafection. Field screenings for Ccephalosporium stripe under artificially inoculated conditions and based on whiteheads (sterile heads caused by pathogen infection) were done in three environments for the Einstein x Tubbs population and in two environments for the Tubbs x NSA 95-0995 population. Results from the QTL analysis identified common regions associated with resistance to stripe rust and Ccephalosporium stripe. A more thorough assessment with additional phenotypic data and a denser genetic map is ongoing.