基于主成分分析的辣椒新品种引进评价OA

[Objective]New pepper varieties suitable for cultivation in Fuquan City were selected to provide a scientific basis for popularization and cultivation of pepper in Fuquan City,Guizhou.[Method]The agronomic traits of 13 pepper varieties newly bred by Guizhou Pepper Research Institute were determined and comprehensively evaluated by PCA and clustering analysis.[Result]The average variable coefficient of pepper agronomic traits was 22.41%,which indicated there was rich in variation of different agronomic traits.The variable coefficient of stem diameter and single fruit weight was 10.16%(the minimum)and 40.14%(the maximum)respectively.There were significant differences in correlations between different agronomic traits of pepper,of which,yield per plant and yield/667m2 were positively related to stem diameter and single fruit weight very significantly,positively related to fruit width and flesh thickness significantly,negatively related to plant height and first flower position significantly and very significantly,and not related to bearing fruit number.The PCA showed that all agronomic traits were divided into 3 principal components with 83.02%accumulative contribution rate.Stem diameter,fruit width,flesh thickness and single fruit weight were the key indexes affecting pepper yield.The comprehensive score of Layan 903,Layan 904,Layan 905 and Layan 901 was 2.97,0.73,0.70 and-1.48 respectively.13 tested pepper varieties were divided into 4 groups.Layan 903 and Layan 901 belonged to GroupⅠand Group Ⅱseparately.Layan 911,Layan 912 and Layan 913 belonged to Group Ⅲ.Layan 910,Layan 801,Layan 909,Layan 904,Layan 908,Layan 907,Layan 902 and Layan 905 belonged to Group Ⅳ.[Conclusion]Layan 903,Layan 904 and Layan 905 with a higher comprehensive score are suitable for popularization and cultivation in Fuquan City,Guizhou.