园艺学报2026，Vol.53Issue(5)：1237-1252,16.DOI:10.16420/j.issn.0513-353x.2025-0325
264份梨种质资源枝条、叶片表型多样性评价
Phenotypic Diversity Evaluation of Shoots and Leaves in 264 Pear Germplasm Accessions
摘要
Abstract
Using 264 pear germplasm accessions preserved in the Pear Germplasm Repository of Nanjing Agricultural University as the research materials,22 descriptive traits,including one-year-old shoot color and lenticel density,and 10 quantitative traits,including petiole length and leaf length,were investigated.The Shannon-Wiener diversity index,coefficient of variation,comparative analyses of inter-and intra-population diversity,correlation analysis and principal component analysis of quantitative traits,and cluster analysis were conducted.The results showed that the diversity indices of the descriptive and quantitative traits ranged from 0.025 to 1.637 and from 2.004 to 2.087,the diversity of quantitative traits was markedly higher than that of descriptive traits.Among the descriptive traits,young leaf color had the highest diversity index(H'=1.637).The coefficients of variation of the 10 quantitative traits ranged from 11.18％to 36.56％,with leaf area showing the highest value(CV=36.56％).Both inter-and intra-population variation of the nine quantitative traits related to shoots and leaves were relatively high,indicating that both contributed substantially to the phenotypic diversity of pear germplasm resources.Based on the comprehensive analysis of correlation and principal component analysis,leaf area,one-year shoot length,and flower bud length can serve as important indicators for evaluating the variation in shoot and leaf traits.Cluster analysis divided the 264 pear germplasm accessions into five groups.Pyrus communis could be distinguished from most Oriental pears,whereas P.bretschneideri and P.pyrifolia within the Oriental pear group did not form independent clusters but showed an intermingled distribution.关键词
梨/种质资源/枝条特征/叶片特征/表型性状/遗传多样性Key words
pear/germplasm resources/shoot traits/leaf traits/phenotypic traits/genetic diversity分类
农业科技引用本文复制引用
徐慧男,高梦洁,齐开杰,崔艳波,吴潇,陶书田,张绍铃,殷豪..264份梨种质资源枝条、叶片表型多样性评价[J].园艺学报,2026,53(5):1237-1252,16.基金项目
新疆维吾尔自治区重大科技专项(2024A02006-1) （2024A02006-1）
江苏省农业科技自主创新资金项目[CX(24)3057] （24）
