Phenotypic genetic diversity and comprehensive evaluation of 44 black seed coat peanut resources
In order to explore elite black seed coat peanut resources,observed phenotypes of 44 black seed coat peanut resources in consecutive 2 years were analyzed on their genetic diversity,correlation,systematic cluster-ing and principal component.Results showed that 6 qualitative traits had great differences among varieties.The 19 phenotypic traits demonstrated that the coefficient of variation ranged from 2.64%to 97.98%with the average of 24.28%,the genetic diversity index ranged from 0.8652 to 2.0704 with the average of 1.7622,indicating that 44 germplasm had rich genetic diversity.Significant positive correlations exhibited between growth period and lateral branch length(r= 0.82),main stem height and first lateral branch length(r= 0.87),primary branch numbers and ef-fective fruit numbers(r= 0.84),pod numbers per plant and full pods per plant(r= 0.96),rate of full pods weight and rate of full seeds weight(r= 0.88),shelling percentage and plumpness degree of pod(r= 0.82).Significant negative correlations were found between pod number per kilogram and 100 pods weight(r=-0.74),pod number per kilo-gram and 100 seeds weight(r =-0.62).The 44 black seed coat peanut germplasm were divided into 6 groups at the Euclidean distance 10.52.Principal component analysis showed that the accumulative contribution rate of 6 major factors to total variation of 17 phenotypic traits accounted for 89.45%,and 6 materials were identified,of which com-prehensive score F was 0.40 or more.
black seed coat peanutphenotypic traitsgenetic diversityprincipal component analysiscom-prehensive evaluation
万方数据
维普
