Research on Quantitative Classification of Native Persimmon Varieties in Zhejiang Province

ZHAO Xian-min1,GONG Bang-chu1,WU Kai-yun1,CHEN Hong-xing2,LV Xian-liang3,WANG Nian-jin4(1.Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Fuyang 311400,Zhejiang,China; 2.Forestry Bureau of Pan'an County,Zhejiang Province,Pan'an 322399,Zhejiang,China; 3.Forestry Bureau of Liandu District,Lishui City,Lishui 323000,Zhejiang,China; 4.Forestry Bureau of Chun'an County,Zhejiang Province,Chun'an 311700,Zhejiang,China)

native persimmon;quantitative classification;principal component analysis;cluster analysis

The phenotype analysis and quantitative classification were carried on 76 native persimmon varieties of Zhejiang Province.The results showed that the descriptive traits took on diversification,and fruit,leaf,branches and other tissues or organs had rich variation on morphological characteristics.The coefficient of variation of quantitative traits was ranged from 0.11 to 0.88,which showed higher variation.The results of classifying the quantitative traits on the native persimmon showed that when taking the fruit weight of 81 g and 123 g as the division points,the small weight fruit accounted for 30%,the large weight fruit for 30%,and the middle weight fruit for 40%;when taking the fruit shape index of 0.9 and 1.1 as the division points,the flat-shaped fruit accounted for 30%,the round-shaped fruit for 40%,and the long-shaped fruit for 30%.With the principal component analysis on phenotype indicator,all the first four principal components could be summarized as comprehensive factors.The first,second and fourth principal components were respectively summarized as fruit integrated factor,leaves integrated factor,and branches integrated factor,and the third principal component was mainly related with the fruit characters.The indicators of low contribution could be removed to achieve the target of indicator optimization.The Q cluster analysis was carried with those optimization indicators,and each group had different feature on different division line and threshold value,and the clustering results were consistent with the traditional morphological classification of persimmon,and the Jinzaoshi persimmon series and other persimmons could be clearly divided into two groups.The R cluster analysis showed that many fruit characters were clustered as a group,and branches,leaves and other traits had not obvious rule to follow,but it was found that some phenotypic traits associated with persimmon vegetative growth were clustered as a group.The paper also resolved the problem of homonym and synonym,and by observation and cluster analysis,it was confirmed that in fact,the 76 native persimmon varieties belong to 68 native persimmon varieties.