SSR Analysis of Genetic Diversity of Pear Cultivars

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (2): 305-310.

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SSR Analysis of Genetic Diversity of Pear Cultivars

CAO Yu-fen¹, L IU Feng-zhi¹, GAO Yuan¹, JIANG L i-jie², WANG Kun¹, MA Zhi-yong¹, and ZHANG Kai-chun^2*

(¹Research Institute of Pom ology, Chinese Academy of Agricultural Sciences, Xingcheng, Liaoning 125100, China; ²Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China)

Received:2006-07-11 Revised:2006-12-04 Online:2007-04-25 Published:2007-04-25
Contact: ZHANG Kai-chun

Abstract

Abstract: Genetic diversity of 41 pear cultivars was analyzed by using SSR markers. Twelve SSR markers amp lified 114 alleles, with an average of 915 alleles per locus. Locus heterozygosity was 0.1517-0.7079, and the genetic diversity index was 014630. Two pairs of p rimer (BGT23b and CHO2D11) could
distinguish all of the pear cultivars except the mutant cultivars. UPGMA cluster analysis showed that the cultivars could be classified into two groups, the occidental pear and oriental pear. Pyrus bretschneideri Rehd. , P. ussuriensis Maxim. , and some P. pyrifolia (Burm. f. ) Nakai cultivars originated in China
interveined each other; Kuerlexiang and other P. sinkiangensis Yüvarieties could be clustered together. Chinese P. py rifolia Baozhu and Deshengxiang, Japanese P. pyrifolia Shinseiki and Housui, Korean P. py rifolia Whangkeumbae were clustered together in the dendrogram. The coefficient between Qiubai andMiliwas high,and they belonged to the same population, so as Nanguo, Manyuanxiang, Qiuzi and Balixiang. Jinhua originated correlatively with J inchuanxue and Cangxixue.

Key words: Pear, Cultivar, Genetic diversity, SSR

CLC Number:

S 661.2

CAO Yu-fen;L IU Feng-zhi;GAO Yuan;JIANG L i-jie;WANG Kun;MA Zhi-yong;and ZHANG Kai-chun. SSR Analysis of Genetic Diversity of Pear Cultivars[J]. ACTA HORTICULTURAE SINICA, 2007, 34(2): 305-310.

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SSR Analysis of Genetic Diversity of Pear Cultivars

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