Journal article
Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
Theoretical and applied genetics, Vol.123(1), pp.143-157
06/2011
Handle:
https://hdl.handle.net/2376/104393
PMCID: PMC4761445
PMID: 21455722
Abstract
A mapping population of 186 recombinant inbred lines developed from a cross between UC1110, an adapted California spring wheat, and PI610750, a synthetic derivative from CIMMYT’s Wide Cross Program, was evaluated for its response to current California races of stripe rust (Puccinia striiformis f. sp. tritici) in replicated field trials over four seasons (2007–2010) in the northern Sacramento Valley. A genetic map was constructed consisting of 1,494 polymorphic probes (SSRs, DArTs, and ESTs) mapped to 558 unique loci, and QTL analysis revealed the presence of four stripe rust resistance QTL segregating in this population, two from UC1110 (on chromosomes 3BS and 2BS) and two from PI610750 (5AL and 2AS). The two QTL of largest effects (on 3BS and 5AL) were validated in independent populations and their intervals narrowed to 2.5 and 5.3 cM, respectively. The 3BS QTL was shown, by allelism test and genotype, to carry a gene different from the Yr30/Sr2 complex. Mapped position also suggests that the 3BS QTL is associated with a gene different from either Yrns-B1 or YrRub, two stripe rust resistance genes mapped to this region in other studies. The 5AL QTL carries a previously unreported partial stripe rust resistance gene, designated here as Yr48. This paper discusses the individual contributions to resistance of these four QTL, their epistatic interactions, and their potential in durable resistance breeding strategies based on combinations of partial resistance genes.
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Details
- Title
- Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
- Creators
- Iago Lowe - Department of Plant Sciences University of California One Shields Av. Davis CA 95616 USALjupcho Jankuloski - Department of Genetics and Plant Breeding Faculty of Agricultural Sciences and Food 1000 Skopje Republic of MacedoniaShiaoman Chao - Cereal Crops Research Unit USDA-ARS Fargo ND 58102 USAXianming Chen - Wheat Genetics, Quality Physiology, and Disease Research Unit USDA-ARS Pullman WA 99164 USADeven See - Wheat Genetics, Quality Physiology, and Disease Research Unit USDA-ARS Pullman WA 99164 USAJorge Dubcovsky - Department of Plant Sciences University of California One Shields Av. Davis CA 95616 USA
- Publication Details
- Theoretical and applied genetics, Vol.123(1), pp.143-157
- Academic Unit
- Plant Pathology, Department of
- Publisher
- Springer-Verlag; Berlin/Heidelberg
- Identifiers
- 99900546926901842
- Language
- English
- Resource Type
- Journal article