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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (16): 94-100.doi: 10.11924/j.issn.1000-6850.casb15010121

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Genetic Variation Analysis of Ziziphus jujuba ‘Zanhuang Dazao’ by SSR Markers

Gao Jiao1, Liu Jun1, Shen Lianying2, Chu Xinfang3, Xu Chaoqun1, Du Zengfeng4, Li Dengke5, Wang Zhe1, Zhang Zhendong1, Pang Xiaoming1   

  1. (1National Engineering Laboratory for Tree Breeding/ College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083; 2Research Center of Chinese Jujube, Agricultural University of Hebei, Baoding Hebei 071001;3Zan huang Forestry Bureau, Shijiazhuang 051230; 4National Improved Cultivar Station of Jujube, Cangzhou Heibei 061000; 5Pomology Institute, Shanxi Academy of Agricultural Science, Taigu Shanxi 030815)
  • Received:2015-01-18 Revised:2015-05-22 Accepted:2015-03-23 Online:2015-07-27 Published:2015-07-27

Abstract: Information about the genetic variation of Ziziphus jujuba ‘Zanhuang Dazao’ at molecular level can provide effective basis for selective breeding of new cultivars. 395 samples of Ziziphus jujuba ‘Zanhuang Dazao’ were collected and were amplified by PCR using 16 SSR markers. The genetic relationships among them were investigated based on analysis of fingerprint data after capillary electrophoresis. Totally, 51 alleles were detected and the number of alleles amplified by per primer ranged from 2 to 9 with an average value of 3.2. The sizes of PCR products ranged from 104 bp to 304 bp. The amount of rare alleles was 16 and polymorphic loci percentage was 75%. After clustering, 28 unique genotypes which were different from each other were obtained within 395 samples, which meant 28 different genotypes were distinguished. Further cluster analysis showed that genetic similarities among these 28 genotypes ranged from 0.7500 to 0.9804 with an average of 0.9047. At the genetic similarity of 0.90, the genotypes were classified into 5 groups. The results indicated that there was a certain degree of genetic variation among Ziziphus jujuba ‘Zanhuang Dazao’ and still had potential to select new cultivars with better quality.