Analysis of phenotypic genetic diversity in edible seed watermelon and its relatives
Analyzing the genetic diversity and phenotypic variation patterns of edible seed watermelon and its relatives can help select superior germplasm and provide a basis for accelerating edible seed watermelon breeding.The genetic diversity of 244 edible seed watermelon and its relatives was investigated by evaluating 34 phenotypic traits and using correlation analysis,cluster analysis and principal component analysis.The results showed that the phenotypic coefficient of variation ranged from 11.32% to 84.59%,and the Shannon-Weiner diversity index ranged from 0.63 to 2.08.Among them,the largest coefficient of variation was center hardness,and the largest diversity indices were leaf blade length,petiole length,petiole thickness and internode length.Cluster analysis divided the 244 materials into two major clusters.Cluster Ⅰ consisted of 138 materials,which were mainly composed of seeded watermelon,amaru watermelon,partially sticky-seeded watermelon and hairy watermelon,with larger seed length,thousand seeds mass,and cotyledons,with deeper leaf cleavage(deep fissure),and higher pulp hardness.Cluster Ⅱ had a total of 106 materials,consisting mainly of com-mon watermelon,partially seeded watermelon,sticky seeded watermelon and hairy watermelon,leaf and fruit are larger,mostly red flesh colour,small seeds and unisexual flowers for most of the materials.The principal component analysis combined 34 phenotypic traits into 9 principal components,with a cumulative contribution of 70.44%.In the comprehen-sive analysis,the participating edible seed watermelon and its relatives have rich genetic diversity,which can be used as a theoretical basis for genetic breeding of edible seed watermelon.
万方数据
维普
