Identification and validation of an over-dominant QTL controlling soybean seed weight using populations derived from Glycine max x Glycine soja
文献类型： 外文期刊
作者： Yan, Long 1 ; Li, Ying-Hui 1 ; Yang, Chun-Yan 2 ; Ren, Shu-Xin 3 ; Chang, Ru-Zhen 1 ; Zhang, Meng-Chen 2 ; Qiu, Li-Jua 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Key Lab Crop Genet & Breeding, Inst Cereal & Oil Crops, Shijiazhuang Branch Ctr,Natl Ctr Soybean Improvem, Shijiazhuang 050035, Peoples R China
3.Virginia Sta
期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）
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收录情况： SCI
摘要： Heterosis, or hybrid vigour, has been used to improve seed yield in several important crops for decades and it has potential applications in soybean. The discovery of over-dominant quantitative trait loci (QTL) underlying yield-related traits, such as seed weight, will facilitate hybrid soybean breeding via marker-assisted selection. In this study, F-2 and F-2:3 populations derived from the crosses of Jidou 12' (Glycine max)xZYD2738' (Glycine soja) and Jidou 9' (G.max)xZYD2738' were used to identify over-dominant QTL associated with seed weight. A total of seven QTL were identified. Among them, qSWT_13_1, mapped on chromosome 13 and linked with Satt114, showed an over-dominant effect in two populations for two successive generations. This over-dominant effect was further examined by six subpopulations derived from Jidou12'xZYD2738'. The seed weight for heterozygous individuals was 1.1- to 1.6-fold higher than that of homozygous individuals among the six validation populations examined in different locations and years. Therefore, qSWT_13_1 may be a useful locus to improve the yield of hybrid soybean and to understand the molecular mechanism of heterosis in soybean
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