Czech J. Genet. Plant Breed., 2015, 51(3):79-85 | DOI: 10.17221/51/2015-CJGPB

QTL mapping for adult-plant leaf rust resistance genes in Chinese wheat cultivar Weimai 8Original Paper

Jiazhen WANG1, Zaifeng LI1, Lingzhi SHI1, Lin ZHU1, Zhikuan REN1, Xing LI1, Daqun LIU1, Syed Jawad Ahmad SHAH2
1 College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Agricultural University of Hebei, Baoding, P.R. China
2 NIFA Tarnab, Peshawar, Pakistan

The wheat cultivar Weimai 8 is a good source of adult-plant resistance to leaf rust in China. In order to understand the genetic background of the resistance genes, 179 F2:3 families derived from the cross Weimai 8 and Zhengzhou 5389 (susceptible to leaf rust) were used to construct a linkage map. Results showed that there was a major QTL on chromosome 2AS, temporarily named QLr.hbau-2AS, responsible for the resistance. QLr.hbau-2AS from the resistant parent Weimai 8 was between the SSR markers Xcfd36 and Xbarc1138, with an interval length of 2.58 cM. In the 2010-2011, 2011-2012 and 2012-2013 crop seasons, it explained 25.79, 71.55 and 60.72% of the phenotypic variation, respectively. The location of QLr.hbau-2AS was close to the leaf rust resistance gene Lr37. However, they may not be the same since QLr.hbau-2AS has a different virulence test response from Lr37. This study identified two closely linked flanking molecular markers QLr.hbau-2AS and these molecular markers will help marker-assisted selection in breeding resistant cultivars in the future.

Keywords: gene postulation; molecular marker; QTL loci; wheat leaf rust

Published: September 30, 2015  Show citation

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WANG J, Zaifeng L, SHI L, ZHU L, REN Z, Xing L, et al.. QTL mapping for adult-plant leaf rust resistance genes in Chinese wheat cultivar Weimai 8. Czech J. Genet. Plant Breed. 2015;51(3):79-85. doi: 10.17221/51/2015-CJGPB.
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