中文摘要：

以27个分属MGⅠ—MGⅧ的北美大豆生育期组标准品种为参照，于2013—2015年在广西南宁市广西农业科学院明阳基地春播条件下，对广西春大豆主栽品种，新选育的春大豆品种及广西春大豆区域试验和热带亚热带地区春大豆区域试验对照种的生育期组归属进行了鉴定与划分。结果表明：在南宁春播条件下所有北美大豆生育期组标准品种均正常成熟，生育日数趋势基本是由短到长，但不同年份间却有所差异。不同年份不同生育期组内生育日数差异非常接近，同一年份不同生育期组间生育日数存在交叉现象。热带、亚热带南方春大豆区域试验对照品种华春6号生育期组归属于MGⅠ，春大豆晚熟品种华春1号生育期归属于MGⅤ，华春2号和华春5号生育期归属于MGⅣ。广西春大豆品种生育期组归属于biGⅢ和MGⅣ，夏大豆品种生育期组归属于MGⅦ和MGⅥ。鉴定结果可为我国大豆生育期组系统建立、大豆育种、引种及品种布局提供依据。

英文摘要：

This field experiment was conducted from 2013 to 2015, and planted at Naning in spring. Twenty-seven standard varieties which represent MG Ⅰ -MG Ⅷ of soybean were introduced from North America. In this study, the major cultivars, recently breed varieties, control cuhivars of regional trial in Guangxi and tropical zone were used as materials to identify their maturity groups. The results showed that all standard varieties of North American could mature in Nanning when planting in spring, and growth stages changed from short to long, but it had difference among different years. Growth stages of same maturity group standard rarities were very close in different years, but it had overlap between adjacent maturity group cuhiVars in the same year. Huachun 6 was classified into MG Ⅰ , Huaehun 1 was MG Ⅴ, Huachun 2 and Huachun 5 were MG Ⅳ, the spring eultivars of Guangxi belonged to MG Ⅲ and MG Ⅳ, the summer varieties belonged to MG Ⅶ and MG Ⅷ. The results of this experiment can provide a reference for establishing the MG system, breeding, introduction and distribution of soybean in China.