摘要
【目的】分析橄榄种质果实表型性状多样性,并根据其多样性进行数量分类。【方法】参考《果树种质资源描述符—记载项目及评价标准》和《橄榄种质资源描述规范和数据标准》等标准进行观测和描述,应用Q型聚类、R型聚类和主成分分析等方法。【结果】11个数量性状中,单果质量的变异系数最大为42.00%,可食率的变异系数最小为3.44%。16个描述性状平均变异类型2.9个,果实形状的变异类型最为丰富,为5个。Q型聚类分析将60份种质资源在欧氏距离为27.81时分为3个组群,组群内的种质资源以果实的形状、大小和品质聚类;R型聚类分析将27个表型性状在相关系数2.27处聚为3组,多数性状表现两两相关或关系密切;主成分分析结果将27个表型性状简化为8个主成分,包含果实形状等16个表型性状。【结论】橄榄种质资源的果实表型性状存在丰富的多样性,果实形状等16个表型性状对数量分类起重要作用。
【Objective】The phenotypic genetic diversity of fruit in Chinese olive germplasm resources was analyzed,and the numerical classification was studied based on the diversity.【Methods】The methods of observation and description were determined according to the books of‘fruit germplasm descriptor： record items and evaluation standards＇ and‘descriptors and data standard for Chinese olive＇,and the data were analyzed by Q cluster analysis,R cluster analysis and principal component analysis.【Results】Among 11 numerical characters,the weight of single fruit was the largest and the coefficient of variation was 42.00%,and the smllest coefficient of variation of the edible rate was 3.44%. The average variable type among 16 discribed characters was up to 2.9,and the shape of fruit had the largest variation with coefficient 5. The result of Q cluster analysis showed that 60 Chinese olive germplasm resources were divided into three groups at the Euclidean distance of 27.81,and clustered in a group based on the shape,size and quality of fruit. The result of R cluster analysis showed that 27 phenotypic characters closely related were significantly clustered into three groups at coefficient of 2.27. 27 phenotypic characters were mainly composed of 8 independent principal components,including 16 phenotypic characters such as the shape of fruit.【Conclusion】The phenotypic genetic diversity of fruit was abundant in Chinese olive germplasm resources. 16 phenotypic characters such as the shape of fruit played an important role in the numerical classification.
出处
《果树学报》
CAS
CSCD
北大核心
2015年第5期797-805,共9页
Journal of Fruit Science
基金
农业部热带作物种质资源保护项目(14RZZY-26
15 RZZY-26)
关键词
橄榄
种质资源
果实
表型性状
多样性
数量分类
Chinese olive
Germplasm resources
Fruit
Phenotypic characters
Diversity
Numerical classification
