Identification and Fine Mapping of qSCR4.01, a Novel Major QTL for Resistance to Puccinia polysora in Maize

文献类型： 外文期刊

第一作者： Deng, Ce

作者： Deng, Ce;Lv, Meng;Li, Xueying;Zhao, Xiaodi;Li, Huimin;Li, Zhimin;Tian, Zhiqiang;Ding, Junqiang;Deng, Ce;Lv, Meng;Li, Xueying;Zhao, Xiaodi;Li, Huimin;Li, Zhimin;Tian, Zhiqiang;Ding, Junqiang;Leonard, April;Jaqueth, Jennifer;Li, Bailin;Hao, Junjie

作者机构：

关键词： maize; southern corn rust; novel QTL; fine mapping

期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）

ISSN： 0191-2917

年卷期： 2020 年 104 卷 7 期

页码：

收录情况： SCI

摘要： Southern corn rust (SCR) is a prevalent foliar disease that can lead to severe yield losses in maize. Growing SCR-resistant varieties is the most effective way to control the disease. To identify major quantitative trait loci (QTLs) for SCR resistance, a recombinant inbred line population derived from a cross between CIMBL83 (resistant) and Lx9801 (sus-ceptible) was analyzed. The resistance to SCR had high heritability within the population, and a major QTL on chromosome 4 (gSCR4.01), which can explain 48 to 65% of the total phenotypic variation, was consistently detected across multiple environments. Using a progeny-based fine-mapping strategy, we delimited gSCR4.01 to an interval of -770 kb. In contrast to other major QTLs for SCR resistance previously reported on the short arm of chromosome 10, gSCR4.01 is a novel QTL and, therefore, a desirable source of SCR resistance in maize breeding programs.

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