Molecular identification of wheat leaf rust resistance genes in sixty Chinese wheat cultivars

Zhikuan Ren, Zaifeng Li, Lingzhi Shi, Xiaodong Wang, Lin Zhu, Xing Li and Daqun Liu
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Zhikuan Ren: College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Hebei Agricultural University, Baoding, P.R. China
Zaifeng Li: College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Hebei Agricultural University, Baoding, P.R. China
Lingzhi Shi: College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Hebei Agricultural University, Baoding, P.R. China
Xiaodong Wang: College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Hebei Agricultural University, Baoding, P.R. China
Lin Zhu: College of Plant Protection, Biological Control Center of Plant Diseases and Plant Pests of Hebei, Hebei Agricultural University, Baoding, P.R. China

Czech Journal of Genetics and Plant Breeding, 2018, vol. 54, issue 1, 1-8

Abstract: Common wheat (Triticum aestivum L.) is the major crop cultivated in Xinjiang and Anhui provinces of China. The climate in these two provinces is favourable for wheat leaf rust (Puccinia triticina) (Pt) infection. Here, we demonstrate a detailed investigation on the leaf rust resistance of 60 major wheat cultivars cultivated in these two regions. A mixture of high virulent Pt races (THTT, THTS, THTQ and PHPS) were used to phenotype all the collected wheat cultivars at an adult plant stage. Phenotypic disease severity (FDS) and the area under the disease progress curve (AUDPC) for each of these wheat cultivars were calculated. Among all the tested wheat cultivars, three cultivars (Xindong20, Xindong 29 and 99AR142-1) with the lowest FDS and AUDPC may carry major resistance genes. Twenty-seven cultivars (45% of the total tested ones) showed a relatively lower resistance with an average of 12.52% FDS and 126.3 AUDPC. Minor resistance or slow rusting genes may be present in this group of cultivars. Molecular markers for leaf rust resistance genes Lr1, Lr9, Lr19, Lr24, Lr26 and Lr34 were further used for the genotypic screening. Lr1, Lr19, Lr26 and Lr34 were detected in 19 (31.7%), 1 (1.7%), 12 (20%) and 6 (10%) wheat cultivars, respectively. Neither Lr9 nor Lr24 could be detected in any of the tested cultivars. These results will greatly improve wheat molecular breeding for leaf rust resistance in these areas.

Keywords: molecular-assisted selection; Puccinia triticina; STS markers; Triticum aestivum L (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjg:v:54:y:2018:i:1:id:6-2016-cjgpb

DOI: 10.17221/6/2016-CJGPB

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