Collection and diversity evaluation of sesame germplasm resources in Shanxi Province
To evaluate the genetic diversity of 58 sesame local germplasm resources collected from 38 counties in Shanxi Province during the Third Crop Germplasm Resource Census and Collection Action in 2020,field investigations were conducted on 41 phenotypic traits of 57 resources. The study was conducted using coefficient of variation,genetic diversity index,correlation coefficient,and cluster analysis methods,and excellent germplasm was screened. The results revealed abundant genetic variations in quantitative traits,with an average genetic diversity index of 1.826 for 27 traits. 1000-grain weight showed the highest genetic diversity index (2.09),and calyx length exhibited the lowest (1.23);The height of the initial branch exhibited the highest coefficient of variation (72.05％),and the growth period showed the lowest (4.01％). The length of the corolla,the height of the initial branch,the length of the main stem fruit axis,the length and thickness of the capsule,the length and width of the basal and middle leaves are significantly positively correlated with the yield per plant. Cluster analysis divided the resource into five groups:materials with multiple branches and high yield;dwarf type;a long growth period with multiple branches but low yield type;high stem,high yield,and large grain;and those has moderate comprehensive traits and has potential for increasing yield after improvement. Excellent germplasm resources were selected based on comprehensive phenotypic traits,including P141028023,P141032019,P140502022,and P140830014. This study provides theoretical reference for the excavation and utilization of sesame local germplasm,and provides excellent parental materials for new variety breeding.
万方数据
维普
