Journal article
Multi-location wheat stripe rust QTL analysis: genetic background and epistatic interactions
Theoretical and applied genetics, Vol.128(7), pp.1307-1318
07/2015
Handle:
https://hdl.handle.net/2376/107441
PMID: 25847212
Abstract
Epistasis and genetic background were important influences on expression of stripe rust resistance in two wheat RIL populations, one with resistance conditioned by two major genes and the other conditioned by several minor QTL.
Stripe rust is a foliar disease of wheat (Triticum aestivum L.) caused by the air-borne fungus Puccinia striiformis f. sp. tritici and is present in most regions around the world where commercial wheat is grown. Breeding for durable resistance to stripe rust continues to be a priority, but also is a challenge due to the complexity of interactions among resistance genes and to the wide diversity and continuous evolution of the pathogen races. The goal of this study was to detect chromosomal regions for resistance to stripe rust in two winter wheat populations, ‘Tubbs’/‘NSA-98-0995’ (T/N) and ‘Einstein’/‘Tubbs’ (E/T), evaluated across seven environments and mapped with diversity array technology and simple sequence repeat markers covering polymorphic regions of ≈1480 and 1117 cM, respectively. Analysis of variance for phenotypic data revealed significant (P < 0.01) genotypic differentiation for stripe rust among the recombinant inbred lines. Results for quantitative trait loci/locus (QTL) analysis in the E/T population indicated that two major QTL located in chromosomes 2AS and 6AL, with epistatic interaction between them, were responsible for the main phenotypic response. For the T/N population, eight QTL were identified, with those in chromosomes 2AL and 2BL accounting for the largest percentage of the phenotypic variance.
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Details
- Title
- Multi-location wheat stripe rust QTL analysis: genetic background and epistatic interactions
- Creators
- M Vazquez - Department of Botany and Plant Pathology Oregon State University Corvallis OR 97331-2902 USARobert Zemetra - Department of Crop and Soil Science Oregon State University Corvallis OR 97331 USAC Peterson - Limagrain Cereals Seeds 3515 Richards Lake Road Fort Collins CO 80524 USAXianming Chen - US Department of Agriculture, Agricultural Research Service, Wheat Genetics, Quality, Physiology, and Disease Research Unit, Department of Plant Pathology Washington State University Pullman WA 99164-6430 USAAdam Heesacker - Department of Crop and Soil Science Oregon State University Corvallis OR 97331 USAChristopher Mundt - Department of Botany and Plant Pathology Oregon State University Corvallis OR 97331-2902 USA
- Publication Details
- Theoretical and applied genetics, Vol.128(7), pp.1307-1318
- Academic Unit
- Plant Pathology, Department of
- Publisher
- Springer Berlin Heidelberg; Berlin/Heidelberg
- Identifiers
- 99900547139501842
- Language
- English
- Resource Type
- Journal article