不同基因型马铃薯块茎损伤性状的综合评价

Comprehensive Evaluation of Potato Bruises in Different Genotypes

【目的】筛选马铃薯块茎耐损伤种质,为损伤相关研究及育种提供理想材料。【方法】选用104份马铃薯品种(系),了解其表皮擦伤、内部损伤和损伤变色3个损伤指标并进行主成分、聚类和多元方差分析。【结果】主成分分析得到的主成分的特征向量值,表皮擦伤远大于内部损伤,内部损伤大于损伤变色。系统聚类分析把104份马铃薯品种(系)分为6个类群,类群间的3种损伤性状存在显著差异。【结论】3种损伤对块茎整体损伤的影响程度为:表皮擦伤>内部损伤>损伤变色,而且得到块茎整体损伤耐性理想的品种(系)类群。简化了损伤性状的研究,为后续的损伤性状研究提供了理想材料。

[Objective] The objective of the experiment was to obtain some bruise-tolerant potato genotypes for the bruising-related research. [Method] One hundred and four potato genotypes were used to assess their bruises by analyzing skinning, internal bruise and browning by Principle Component Analysis （PCA）, Multivariate Analysis of Variance （MAOVA） and cluster analysis. [Result] The vector of principle component was skinning〉internal bruise〉browning in PCA of three bruises while 104 potato genotypes can be clustered into six clusters with prominent difference. [Conclusion] The importance of three bruises for tuber was skinning （SK）〉internal bruise （IB）〉browning （BR）. Some genotypes with good integrative bruise tolerance were obtained. The result can simplify bruising problem and provide basic materials for further research.