qGLS1.02 , a novel major locus for resistance to gray leaf spot in maize
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qGLS1.02, a novel major locus for resistance to gray leaf spot in maize Xiangling Lv & Maoxing Song & Zixiang Cheng & Xiaoyan Yang & Xiaocong Zhang & Zhiqiang Zhou & Chaoshu Zhang & Lei Zheng & Yuan Li & Kairong Lei & Hongwei Wang & Wanli Du & Fenghai Li & Xinhai Li & Jianfeng Weng
Received: 19 October 2019 / Accepted: 6 May 2020 / Published online: 15 June 2020 # Springer Nature B.V. 2020
Abstract Gray leaf spot (GLS), caused by the fungal pathogen Cercospora zeae-maydis, is one of the most serious foliar diseases of maize worldwide. In the present study, a population of recombinant inbred lines
(RILs) derived from a gray leaf spot–resistant inbred line Qi319 and a susceptible line Ye478 was used to map quantitative trait loci (QTL) for GLS resistance. For initial QTL analysis, genetic maps containing 199
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11032-020-01134-8) contains supplementary material, which is available to authorized users. X. Lv : M. Song : Y. Li : H. Wang : W. Du : F. Li College of Agronomy, Shenyang Agricultural University, Shenyang 110161 Liaoning, China
Z. Cheng e-mail: [email protected]
X. Lv e-mail: [email protected]
X. Zhang e-mail: [email protected]
M. Song e-mail: [email protected]
Z. Zhou e-mail: [email protected]
Y. Li e-mail: [email protected]
C. Zhang e-mail: [email protected]
H. Wang e-mail: [email protected]
L. Zheng e-mail: [email protected]
W. Du e-mail: [email protected]
X. Yang : K. Lei Chongqing Academy of Agricultural Sciences, Chongqing 401329, China
F. Li e-mail: [email protected] M. Song : Z. Cheng : X. Zhang : Z. Zhou : C. Zhang : L. Zheng : X. Li (*) : J. Weng (*) Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China e-mail: [email protected] e-mail: [email protected]
X. Yang e-mail: [email protected] K. Lei e-mail: [email protected]
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simple sequence repeat (SSR) markers were constructed. One major QTL, qGLS1.02, was consistently detected between SSR markers umc2614 and bnlg1803, and explained 6.86–36.24% of the phenotypic variation in GLS resistance. The chromosome segment substitution lines harboring the qGLS1.02 from Qi319 were more resistant to GLS (P < 0.01). Using a recombinantderived progeny test strategy, the interval containing qGLS1.02 was narrowed to ~ 314 kb according to the B73 (RefGen_v4 genome) including 12 candidate genes; only six of them have been annotated functionally. Keywords Maize . Gray leaf spot . Recombinant inbred lines . Chromosome segment substitution lines . Fine mapping
Introduction Gray leaf spot (GLS) is one of the world’s most serious foliar diseases caused by the causal fungal pathogens Cercospora zeae-maydis and Cercospora zeina in China. This destructive disease has resulted in yield losses of over 50% in the USA and from 20 to 60% in South Africa in the case of outbreak (Nsibo et al. 2019; Ward et al. 1997, 1999). Cercospora zeae-maydis is the main fungal pathogen in Liaoning Province in
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