Evaluation of Commodity Quality and Yield of Seven Dark-green Line Peppers Based on Principal Component and Cluster Analysis
[Objective]The differences in commodity quality and yield of dark-green line pepper varieties were explored,so as to provide scientific basis for adjusting the variety structure and advantageous regional layout of pepper industry in Guizhou.[Method]Seven dark green line pepper varieties(Changla 7,Xiangla 17,Zhuojiao 7,Zhuojiao 8,Xiangla 8,Hongguan 303,and Taifeng 5)were selected as the research objects.SPSS 26.0 was used for variation coefficient analysis and principal component analysis.Origin 2022 was used for correlation and cluster analysis.And the commodity quality and yield were comprehensively evaluated.[Result]The coefficient of variation for commodity quality and yield traits of seven dark green line pepper varieties was 6.91%-28.17%,with the smallest coefficient of variation for fruit shape and the largest coefficient of variation for fresh weight of single fruit.There was a highly significant correlation between fresh weight of single fruit and fruit longitudinal diameter,as well as between fresh pepper yield and dry matter content.There was a significant correlation between fruit longitudinal diameter and fruit transverse diameter,between fresh weight of single fruit and fruit transverse diameter,between dry pepper yield and number of fruits per plant,between number of fruits per plant and fruit longitudinal diameter,number of fruits per plant and fresh weight of single fruit,between fresh weight of single fruit and dry matter content.Based on the 9 traits of seven dark-green line pepper varieties,a comprehensive performance evaluation model was established through PCA to discover that Zhuojiao 7 had the best comprehensive performance.Zhuojiao 7 had the highest yield,which was 2410kg/667m2.Cluster analysis divided seven varieties into 3 categories,with one category suitable for fresh processing(Changla 7,Hongguan 303,Xiangla 8 and Xiangla 17),one category suitable for both fresh and dry processing(Taifeng 5 and Zhuojiao 8),and one category suitable for harvesting and marketing during the green maturity period(Zhoujiao 7).[Conclusion]The diversity of 7 dark green line pepper varieties is abundant.The fresh weight of single fruit,fruit transverse diameter,fruit longitudinal diameter,and number of fruits per plant are the main factors contributing to the yield of fresh pepper,while the number of fruits per plant is the main factor contributing to the yield of dry pepper.Zhuojiao 7 has the highest fresh pepper yield and is suitable for harvesting and marketing during the green ripening period.Zhuojiao 8 has moderate fruit shape and flesh thickness,with high yield of both fresh and dry pepper,making it an ideal processing variety.
pepperdark-green line pepper varietycommodity qualityvariety evaluationqualityyield
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