园艺学报 ›› 2016, Vol. 43 ›› Issue (7): 1245-1256.doi: 10.16420/j.issn.0513-353x.2015-0936

• 果树 • 上一篇    下一篇


张 莹,曹玉芬*,霍宏亮,田路明,董星光,齐 丹,张小双   

  1. (中国农业科学院果树研究所,农业部园艺作物种质资源利用重点实验室,辽宁兴城 125100)
  • 出版日期:2016-07-25 发布日期:2016-07-25

Research on Diversity of Pear Germplasm Resources Based on Flowers Phenotype Traits

ZHANG Ying,CAO Yu-fen*,HUO Hong-liang,TIAN Lu-ming,DONG Xing-guang,QI Dan,and ZHANG Xiao-shuang   

  1. (Research Institute of Pomology,Chinese Academy of Agricultural Sciences;Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(Germplasm Resources Utilization),Ministry of Agriculture,Xingcheng,Liaoning 125100,China)
  • Online:2016-07-25 Published:2016-07-25



关键词: 梨, 种质资源, 花, 表型性状, 多样性


Eleven phenotypic characters related to flower traits were collected from 625 accessions of 13 Pyrus species preserved in National Germplasm Repository of Apple and Pear. Distribution frequency,coefficient of variation,Simpson index and Shannon index were analyzed. Comparative analysis of intraspecific and interspecific diversities of 4 phenotypic characters,i.e. number of flowers per inflorescence,number of stamen,number of stigma and corolla diameter was carried out in 5 cultivated Pyurs species. The crisp-fleshed and soft-fleshed pear accessions were clustered. It showed that the phenotypic diversity in pear flower organ was abundant. White unopened flower,fuchsia anther,position of stigma above stamen,absent pubescence on the base of stigma had more proportion than other corresponding descriptors,accounting for 50.56%,47.52%,63.20% and 80.96% respectively. Anther color was found to have the richest diversity with 0.719 of Simpson index and 2.351 of Shannon indexrespectively,and deep red anther and deep purple anther were newly discovered. The average variation coefficient of flowers per inflorescence,number of stamencorolla diameter and number of stigma was 19.50%,15.12%,13.74% and 8.50%,respectively,which showed that genetic stability of number of stigma was higher than the other three traits. Based on the statistical analysis of frequency distribution of corolla diameter,5 levels of numerical classification and reference cultivars were proposed. There were significant differences in 4 flower traits of pear among and within populations,and phenotypic differentiation coefficient(VST)of intraspecies and interspecies was 72.97% and 27.03%respectively,which showed that the variation within populations was more abundant. Cluster analysis showed that 196 crisp-fleshed local pear cultivars could be divided into 5 categories and 72 soft-fleshed P. ussuriensis accessions into 4 categories.

Key words: pear, germplasm resource, flower, phenotypic character, diversity