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Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
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Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
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Mapping and validation of QTL which confer partial resistance to broadly virulent post-2000 North American races of stripe rust in hexaploid wheat
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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
2011
Overview
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.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
/ Basidiomycota - pathogenicity
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Classical genetics, quantitative genetics, hybrids
/ crossing
/ Fundamental and applied biological sciences. Psychology
/ Genes
/ genetics
/ Genetics of eukaryotes. Biological and molecular evolution
/ Genotype
/ loci
/ Plant Breeding/Biotechnology
/ Plant Diseases - microbiology
/ Plant-pathogen relationships
/ races
/ Seasons
/ Triticum
/ Vegetals
/ Wheat
