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Title:: A Preliminary Report on the Study of Maturity Group Classification of Soybean Varieties(Lines)in HuangHuai

Author(s):: ?WANG Da-gang¹; HU Guo-yu¹; LI Jie-kun¹; HUANG Zhi-ping¹; YU Guo-yi²; ZHANG Lei¹

Abstract:: ?In order to promote scientific introduction between China’s different regions and international exchange and cooperation，the maturity group(MG)categories for 95 varieties(lines)from the major varieties and new varieties(lines)of Huang-Huai were identified by comparing these varieties(lines)with 13 MG standard varieties of North America，which covered MGII-MGV.All standard and major varieties and new varieties(lines)were sown at Huaiyuan and Hefei in summer.The results showed that the 13 MG standard varieties could mature normally in 2 years，3-point trials，except PI561400 was immatured in Hefei in 2012 and the MGs of 95 varieties(lines)ranged from MGII to MGV.Thirty-six soybean varieties(lines)belonged to MGIII，account for 37.9%，in Huaiyuan，in 2011 and 2012.Twenty-nine and 21 soybean varieties(lines)were classified into MGII and MGIV，account for 30.5% and 22.1%.Eleven varieties from Hefei could be classified into the same MGs with Huaiyuan，but 10 could be late 1-2 MGs.Zhonghuang 13 and Wandou 28，the major varieties of Huang-Huai，the growth periods(VE-R8)ranged 94-96 d and 97-100 d in 2 years，3-point trials，belonged to MGII and MGIII，respectively.The results of this experiment can provide a reference for establishing the MG system and regionalize the soybean production regions in China.
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