浙江红花油茶实生群体性状变异及综合评价OA北大核心CSTPCD

In this study,seedling populations of Camellia chekiangoleosa were analyzed to investigate their phenotypic variation,screen for superior individuals,and strengthen the conservation of genetic resources for breeding utilization.Variation,correlation,regression,and path analyses were performed on important economic traits.Principal component analysis as well as the subordinate function value and multidimensional coordinate synthetic evaluation methods were used to select the superior individuals.The results showed high phenotypic variation among the individual plants,with the coefficient of variation of 25 traits being 5.74%-57.16%and the diversity index being 1.934 6-2.095 9.The regression analysis revealed that the number of fruits,fresh seed weight per fruit,dry kernel weight per fruit,and kernel oil content were the key phenotypic traits affecting oil yield per plant.The path analysis identified the dry kernel weight per fruit as the main decision variable and the number of fruits as the main limiting variable.With principal component analysis,the 25 traits were transformed into 6 main principle components with a cumulative contribution rate of 86.557%.Nine superior individuals were screened out by using the above three methods.In conclusion,the high phenotypic variation among seedling populations of C.chekiangoleosa provides a material basis for the breeding of new high-yielding and high-quality varieties.