Photosynthetic and Physiological Characteristics of Soybean Sibling Cultivars Jidou 17 ,Ji nf58 and Their Relationships with Yield Traits

doi:10.15933/j.cnki.1004-3268.2017.04.008

Abstract：Jidou 17,Ji nf58 and their parents were planted from 2013 to 2015,the yield and related agronomic traits were investigated,the net photosynthetic rate,soluble sugar content,soluble protein content and antioxidase activity were measured at full-bloom stage,podding stage and seed filling stage,the difference of the above indexes of Jidou 17,Ji nf58 and their parents and their relationships with yield were analyzed,so as to provide theoretical guidance for high yield breeding.The results showed that yield and related agronomic traits of Jidou 17 and Ji nf58 were higher than that of their parents,among which yield,plant height,number of nodes on main stem and biomass at full-bloom stage,podding stage and seed filling stage of Jidou 17 and Ji nf58 were significantly higher than that of their parents.For Jidou 17,the seed weight per plant and 100-seed weight were significantly higher than that of the parents.The net photosynthetic rate of Jidou 17 and Ji nf58 were higher than that of their parents at full-bloom stage,podding stage and seed filling stage,especially at podding stage and seed filling stage for Jidou 17.Soluble sugar content and soluble protein content of Jidou 17 and Ji nf58 were higher than that of their parents at the three stages.The activities of superoxide dismutase,catalase and glutamine synthetase were higher in Jidou 17 and Ji nf58 compared to their parents at full-bloom stage.There were extremely significantly positive correlation between yield and biomasses at three stages.There were significantly or extremely significantly positive correlation between yield and net photosynthetic rate at podding stage and seed filling stage.Yield also had significantly or extremely significantly positive correlation with soluble protein content at three stages.There were significantly or extremely significantly positive correlation between yield and soluble sugar content at podding stage,superoxide dismutase at full-bloom stage and podding stage,activity of glutamine synthetase at flowering stage.It was beneficial to improvement of yield when the net photosynthetic rate at podding stage and seed filling stage,the soluble protein content at three stages,the soluble sugar content at podding stage,the activities of superoxide dismutase and glutamine synthetase at full-bloom stage were higher in soybean.Therefore,these physiological characteristics could be used as theoretical bases for high yield breeding.