Mapping QTL underlying tuber starch content and plant maturity in tetraploid potato

文献类型： 外文期刊

第一作者： Li, Jianwu

作者： Li, Jianwu;Zhou, Jun;Xie, Conghua;Li, Jianwu;Zhou, Jun;Xie, Conghua;Li, Jianwu;Zhou, Jun;Xie, Conghua;Li, Jianwu;Wang, Yihang;Wen, Guohong;Li, Gaofeng;Li, Zhang;Zhang, Rong;Ma, Sheng

作者机构：

关键词： Potato; QTL; Tetraploid; Tuber starch content; Plant maturity

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2019 年 7 卷 2 期

页码：

收录情况： SCI

摘要： Tuber starch content and plant maturity are two important agronomic traits of potato. To investigate the complex genetic basis of these traits in the cultivated potato, as well as the relationship between them, we developed a linkage map in a tetraploid population of 192 clones derived from the cross Longshu 8 x Zaodabai and mapped quantitative trait loci (QTL) for tuber starch content and plant maturity using data collected in three diverse environments over two years. We detected eleven QTL for tuber starch content distributed on seven chromosomes, of which four, on chromosomes I, II, and VIII, were expressed in at least three environments. For plant maturity, we identified six QTL on chromosomes II, IV, V, VII, and XI, one of which, on chromosome V, showed LOD peaks ranging from 45.2 to 62.5 cM and explained 21.6%-26.6% of phenotypic variation was expressed in five of the six environments. Because the reproducible QTL for plant maturity and tuber starch content mapped to different chromosomes and neither overlapping QTL, nor any genetic interaction between QTL were detected, we infer that tuber starch content and plant maturity are controlled by independent genetic loci. This inference supports the prospect of breeding potato for both early maturity and high starch content. (c) 2019 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V.

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