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

查看全文 作　　者：Jianwu [1,2,3,4]Li;Yihang [4]Wang;Guohong [4]Wen;Gaofeng [4]Li;Zhang [4]Li;Rong [4]Zhang;Sheng [4]Ma;Jun [1,2,3]Zhou;Conghua [1,2,3]Xie 高影响力作者 机构地区：[1]Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs;[2]Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Ministry of Education;[3]College of Horticulture and Forestry Sciences, Huazhong Agricultural University;[4]Gansu Academy of Agricultural Sciences高影响力机构 出　　处：《The Crop Journal》索引2019年第7卷第2期,共12页高影响力期刊 基　　金：supported by Earmarked Fund for China Agriculture Research System(CARS-09-P07);the National Natural Science Foundation of China(31160299,31760410) 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 × 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. 关 键 词：POTATO QTL TETRAPLOID TUBER starch content PLANT MATURITY
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