Analysis of Genetic Variation of Soybean Germplasm Resources under Two Phosphorus Levels
[Objective] The genetic variation of soybean protein and fat traits and a part of environmental influence to genetic variation were studied.This study would provide germplasm resources and theoretical basis in improving the yield and quality of soybean in south China.[Method]335 soybean materials were choose from different source in China.And we sowed them in red soil lacking phosphorus where we did not provide phosphorus fertilizer (LP) but provide surface-soil calcium (160 kg/hm2,HP) in Eshan County,Yunnan province,in 2015-2016.Then we determined the key indicators such as the content of protein and oil.[Results] After 2 years,protein content variation of the soybean germplasm resources was the largest,followed by oil content,protein + oil content variation,and the variation coefficient of which was 5.35 ％,5.21％ and 2.86 ％,respectively.Under the condition of high phosphorus and low phosphorus,the protein variation amplitude was 34.78 ％-49.32 ％ and 33.98 ％-49.32 ％,oil content was 17.24 ％-23.43 ％ and 23.43 ％-14.68 ％,respectively.Protein traits between interarnual variations were larger,and the variation coefficient was 5.34 ％ and 5.07 ％ respectively under the condition of high phosphorus and low phosphorus.The oil content was relatively stable,and the variation coefficient was 4.95 ％ and 4.96 ％,respectively.Crude fat content of soybean planted in high latitudes was higher,and higher protein content of soybean varieties in low latitudes.In the evolution process from wild to half wild to cultivated,the content of crude protein gradually decreased,the crude fat content gradually increased,protein and fat content gradually increased firstly and then decreased.Phosphate could increase the crude protein content in soybean,but significantly reduce the content of crude fat.The water shortage had a relatively strong impact on the protein content in growth period.[Conclusion] Soybean quality traits were mainly controlled by genetic factors,but phosphorus nutrition and precipitation and other environmental factors also played an important role.The results of the study provided an important theoretical basis in improving the south soybean yield and grain protein traits.
NETL
NSTL
万方数据
维普
