Genetic Diversity Analysis of Ornamental Peach Germplasm Based on Phenotypic Traits
With 106 ornamental peach germplasm resources collected from the ornamental peach resource nursery of Yanling Institute of Forestry Science as research materials,diversity analysis was conducted on 30 phenotypic traits(18 quality traits and 12 quantitative traits)by calculating coefficient of variation and diversity index,combining correlation,principal component,and cluster analysis.The results showed that there were significant differences in traits and rich genetic diversity among 106 ornamental peach germplasm resources.Among them,the average coefficient of variation for quantitative traits was 33.80%,with the maximum coefficient of variation for petal number,being 68.17%.The average diversity index was 1.82,with the highest diversity index for flower diameter and petal length,both being 2.07.The diversity index for quality traits(0.85)was lower than that for quantitative traits,with the highest diversity index for petal color,being 1.87.Correlation and principal component analysis showed that there were 111 pairs and 39 pairs of traits with extremly significantly and significantly correlated,and the cumulative contribution rate of 9 principal components was 72.691%.Dwarf type,flower type,petal type,number of sepals,flower diameter,number of petals,petal width,etc.were the main traits that affected the phenotype of ornamental peaches.Based on the genetic differences in traits between germplasms,when the genetic distance was 6.5,the test materials were divided into 11 groups.The genetic clustering was closely related to plant type,flower type,petal type,petal color,anther color,branch color,leaf color,and other traits.Based on the clustering results,18 excellent germplasm resources were selected.In summary,the main phenotypic traits of 106 ornamental peach germplasm resources exhibit rich genetic diversity.
万方数据
维普
