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Genetic overlap between salt and low-temperature tolerance loci at germination stage of soybean

Qiu Pengcheng  Du Yongchun  Song Mangang  Jiang Hongwei  Zhang Wenbo  Chang Guoyou  Kong Guodong  Hu Guohua  Chen Qingshan  
【摘要】:Salt and low temperature were both very important factors for soybean production. It was necessary to improve the salt stress and low-temperature tolerance of soybean. The main purpose of this paper was to map the quantitative trait loci(QTL) related with salt tolerance and low- temperature tolerance at germination stage with backcross introgression lines(BILs),and analyze the genetic overlap between them. There were 22 QTL located with BC2 F4 introgression populations after salt stress,and 15 QTL were mapped after low-temperature stress. Seven overlapping QTLs between salt tolerance and low-temperature tolerance were detected on 6 linkage groups at germination stage. In total,there were 31.81 % of salt tolerance and low-temperature tolerance loci existed genetic overlap.

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