qRgls1.06, a major QTL conferring resistance to gray leaf spot disease in maize

Crop Journal

Zhihong Li¹  Feng Teng¹  Lihong Zhai²  Hao Sun³  Zuxin Zhang³ 

[1] Hubei Tenglong Seed Co., Ltd, Xiangyang 441100, Hubei, China;Medical College, Hubei University of Arts and Science, Xiangyang 441053, Hubei, China;National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, Hubei, China;

关键词: Fine mapping;    Marker assisted selection;    Quantitative trait locus;    Yield-related traits;    Zea mays;   

DOI  :  

来源: DOAJ

【 摘 要 】

Gray leaf spot (GLS) caused by Cercospora zeae-maydis and C. zeina is an extremely devastating leaf disease that limits maize production annually. The use of GLS-resistant maize hybrids is the most cost-effective approach for reducing losses. Resistance to GLS is quantitatively inherited in maize (Zea mays L.) and further sources of resistance remain to be analyzed. Here, we detected qRgls1.06, a major quantitative trait locus for GLS resistance in bin 1.06 that explained approximately 55% of the phenotype variance. Fine mapping over 2 consecutive years localized qRgls1.06 to a 2.38-Mb region. Homozygous qRgls1.06WGR/WGR plants in DZ01 background displayed higher GLS resistance and 100-grain weight than DZ01 plants. The GLS responses of several susceptible elite inbred lines were improved by the introduction of qRgls1.06 by marker-assisted backcrossing. Our findings extend the understanding of the genetic basis of resistance to GLS and provide a set of resistant germplasm for genetic improvement of resistance to GLS in maize.

【 授权许可】

Unknown