Phenotypic diversity analysis of chestnut cultivars planted in Luotian,Hubei province
[Objective]To explore the diversity of bracts and nuts in morphological traits of the main chestnut cultivars in Luotian county,Hubei province,the range of variation in these traits and the correlations among them were analyzed.[Method]Thirteen phenotypic indexes,including bract transverse longitudinal diameter,nut transverse longitudinal diameter,bract mass,nut grain number,and nut single grain mass,were measured.And correlation analyses were performed by methods of descriptive statistical analysis,analysis of variance(ANOVA),and multiple comparisons.[Result](1)There were significant or extremely significant differences in the same index among different varieties of chestnut.The average coefficient of variation of the 13 phenotypic traits was 6.80% .Among these traits,the coefficient of variation of the quality of single grain of the nut was the largest,which was 14.09%,while the coefficient of variation of the longitudinal diameter of the nut was the smallest,which was only 2.63% .(2)The trait stability of the nut phenotype was high,and its average coefficient of variation was 5.94%,which was significantly lower than that of the average coefficient of variation of the bract phenotype trait(7.80% ),indicating that the nut phenotype trait had greater genetic stability.(3)According to the correlation analysis,five pairs of traits showed highly significant positive correlation,six pairs showed significant positive correlation,one pair showed highly significant negative correlation,and one pair showed significant negative correlation.The bract mass was significantly positively correlated with nut transverse diameter,and highly significant positively correlated with nut individual grain mass and base transverse diameter.The nut individual grain mass was highly significant positively correlated with nut transverse diameter,and significantly positively correlated with base transverse diameter.Thus,the nut individual grain mass was more closely related to the phenotypic traits of chestnut nuts,and less correlated with the phenotypic traits of fruit bracts.[Conclusion]By analyzing the fruit phenotypic diversity of the main planted chestnut varieties in Luotian county,Hubei province,the pattern of genetic variation was revealed to a certain extent,which provided a reference for the evaluation of the germplasm resources of the main planted chestnut varieties and the breeding of the varieties in Luotian county,Hubei province.
万方数据
维普
