Studies on the Classification of Maturity Groups of Soybeans in China
2001; Science Press; Linguagem: Inglês
ISSN
0496-3490
Autores Tópico(s)Soybean genetics and cultivation
ResumoThe US maturity groups system has been extensively accepted, but was not used in China due to the complexity of maturity types and growing seasons. To link the Chinese system with the US maturity groups system, forty eight varieties of 13 MGs (Maturity groups) from the US and 256 land races from all of the soybean producing areas in China were tested under the spring planting and extended day length conditions, and some of the materials were also tested in Baoding, Hebei province and Harbin, Heilongjiang province. According to the US checks of the MGs, the Chinese varieties were grouped into 000, 00, 0, Ⅰ, Ⅱ, …, Ⅸ, total 12 groups of maturity, without Group Ⅹ which might not exist in China. Within the groups of 0, Ⅰ, Ⅱ, and Ⅲ, there existed different structure of growth periods. Those from the north of Qinling Mountain Huai River with relatively short period of days to flowering were further classified as 0 1, Ⅰ 1, Ⅱ 1, and Ⅲ 1; those from the south of it with relatively short period of flowering to maturity were further classified as 0 2, Ⅰ 2, Ⅱ 2, and Ⅲ 2. In this way, 12 groups including eight sub groups were classified in China. A set of US and Chinese checks for each of the groups as well as sub groups were nominated and can be used for identification of MG of any material. In addition, the geographic distribution of MGs in China was also presented.
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