Mapping QTL affecting the vertical distribution and seed set of soybean [Glycine max (L.) Merr.] pods

Publication date: Available online 6 June 2019Source: The Crop JournalAuthor(s): Shiping Liu, Hong Xue, Kaixin Zhang, Ping Wang, Daiqun Su, Wenbin Li, Shichao Xu, Jianan Zhang, Zhongying Qi, Yanlong Fang, Xiyu Li, Yue Wang, Xiaocui Tian, Jie Song, Jiajing Wang, Chang Yang, Sitong Jiang, Wenxia Li, Hailong NingAbstractNumber of pods per plant and number of seeds per pod are quantitative, multigenic traits and important components of yield in soybean [Glycine max (L.) Merr.]. Pods are distributed unevenly in the upper, middle, and lower segments of the plant and this distribution is affected by sowing date (SD). A population of four-way recombinant inbred lines (FW-RIL), containing 160 F2:8 individuals, was generated from the cross (Kenfeng 14 × Kenfeng 15) × (Heinong 48 × Kenfeng 19). A linkage map consisting of 275 simple sequence repeat (SSR) markers was used to map quantitative trait loci (QTL) associated with the production of one, two, three, and four seeds per pod in the upper, middle, and lower segments of plants at two SDs, totaling 12 measurements per SD. A wide range of variation in the twelve characteristics was observed among the four parental lines and the FW-RIL population at the two SDs. The effect of SD2 (May 17, 2016) on pod number was stronger than that of SD1 (May 7, 2016) because the heritability of each trait in the SD1 experiment was generally greater than that of SD2. The study identified 76 QTL controlling pod number, with the phenotypic ...

Source: The Crop Journal - June 7, 2019 Category: Food Science Source Type: research