Record Details

Genetic analysis of adult plant, quantitative resistance to stripe rust in wheat cultivar ‘Stephens’ in multi-environment trials

OAR@ICRISAT

View Archive Info
 
 
Field Value
 
Relation http://oar.icrisat.org/5517/
http://dx.doi.org/10.1007/s00122-011-1681-x
 
Title Genetic analysis of adult plant, quantitative resistance to stripe rust in wheat cultivar ‘Stephens’ in multi-environment trials
 
Creator Vazquez, M D
et al, .
 
Subject Genetics and Genomics
 
Description The wheat (Triticum aestivum L.) cultivar
‘Stephens’ has been grown commercially in the USA
Pacific Northwest for 30 years. The durable resistance of
‘Stephens’ to stripe rust (Puccinia striiformis f. sp. tritici)
was believed to be due to a combination of seedling and
adult plant resistance genes. Multilocation field trials,
diversity array technology (DArT), and simple sequence
repeat (SSR) markers were used to identify quantitative
trait loci (QTL) for resistance. Recombinant inbred lines
were assessed for stripe rust response in eight locations/
years, five in 2008 and three in 2009. The data from Mt. Vernon, WA, differed from all other environments, and
composite interval mapping (CIM) identified three QTL,
QYrst.orr-1AL, QYrst.orr-4BS, and QYrpl.orr-6AL, which
accounted for 12, 11, and 6% of the phenotypic variance,
respectively. CIM across the remaining six environments
identified four main QTL. Two QTL, QYrst.orr-2BS.2 and
QYrst.orr-7AS, were detected in five of six environments
and explained 11 and 15% of the phenotypic variance,
respectively. Two other QTL, QYrst.orr-2AS and QYrpl.
orr-4BL, were detected across four and three of six
environments, and explained 19 and 9% of the phenotypic variance, respectively. The susceptible parent ‘Platte’
contributed QYrpl.orr-4BL and QYrpl.orr-6AL, with the
remaining QTL originating from ‘Stephens’. For each
environment, additional minor QTL were detected, each
accounting for 6–10% of the phenotypic variance. Different
QTL with moderate effects were identified in both
‘Stephens’ and ‘Platte’. Significant QTL 9 environment
interactions were evident, suggesting that specificity to
plant stage, pathogen genotype, and/or temperature was
important
 
Publisher Springer Verlag
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/5517/1/TheorAppl%20Genet_124_1%E2%80%9311_2012.pdf
Vazquez, M D and et al, . (2012) Genetic analysis of adult plant, quantitative resistance to stripe rust in wheat cultivar ‘Stephens’ in multi-environment trials. TAG Theoretical and Applied Genetics, 124 (1). pp. 1-11. ISSN 1432-2242