Genetic Diversity Analysis of Processing Pepper Germplasm Resources
To evaluate the genetic diversity of processing pepper germplasm resources,24 agronomic traits,8 quality traits and anthracnose resistance of 33 processing pepper germplasm resources were analyzed by genetic diversity,correlation and cluster analyses.The results showed that among the 24 agronomic traits,the Shannon-Wiener diversity index(H′)of plant width,fruit pedicel length and pulp thickness were higher,indicating rich genetic diversity;the variation coefficient was the highest in yield per plant and the lowest in ventricle number,which was 73.55%and 9.18%,respectively.The yield per plant was significantly positively correlated with fruit flesh thick,fruit length,and fruit diameter.Among the 8 quality traits,the variation coef-ficients of capsaicin and dihydrocapsaicin contents were higher as 106.98%and 112.44%,respectively.The Scoville Heat Unit was significantly positively correlated with the crude fiber and protein,extremely signifi-cantly positively correlated with the capsaicin and dihydrocapsaicin contents,and significantly negatively cor-related with moisture content.The 33 processing-type pepper germplasms were clustered into 3 groups based on the average membership degree of the quality characters,and their average membership degree were 0.32,0.47 and 0.64,respectively.Correlation analysis between anthracnose resistance and agronomic and quality traits showed that anthracnose resistance was extremely significantly positively correlated with moisture content,fruit length and ventricle number,and extremely significantly negatively correlated with protein and crude fiber contents.These research results would provide theoretical bases for the application and breeding of processing-type pepper varieties.
万方数据
维普
