Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (1): 89-98.doi: 10.3864/j.issn.0578-1752.2013.01.011

• HORTICULTURE • Previous Articles     Next Articles

Genetic Diversity and Population Structure of the North China Populations of Apricot (Prunus armeniaca L.)

 ZHANG  Qiu-Ping, LIU  Dong-Cheng, LIU  Wei-Sheng, LIU  Shuo, ZHANG  Ai-Min, LIU  Ning, ZHANG  Yu-Ping   

  1. 1.Liaoning Institute of Pomolgy, Yingkou 115009, Liaoning
    2.Institute of Genetics and Developmental Biology,                     Chinese Academy of Sciences, Beijing 100101
  • Received:2012-08-30 Online:2013-01-01 Published:2012-10-25

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Abstract: 【Objective】The objective of the present study is to reveal the genetic diversity, specificity and population differentiation of the North China populations in common apricot (Prunus armeniaca L.). 【Method】 A total of 21 simple sequence repeat (SSR) primers were used to detect the genetic variation, genetic diversity and population structure of 67 common apricots sampled from different regions. 【Result】 All of the 21 SSR loci were polymprphic among the 67 accessions and a total of 301 allelic variations were detected. The average number of allelic variations per locus was 14.33, ranging from 8 to 24. The average Shannon’s information index (I) per locus was 1.934 with a range of 0.65-2.67. By comparison of the diversity among different origins, the genetic diversity of local apricot was rich in the northwest Loess Plateau region. More complementary alleles existed among different geographical origin types and specific alleles existed among different geographical origin types. According to the model-based clustering method, seven groups in the North China populations were detected, and the accessions of different geographical origins were divided into three or more groups. When K=4, all the 63 tested genotypes (expect for kernel-using apricot) were divided into 3 populations: Southwestern group, North China Plain group and Eastern Hills group (Shandong and Southern of Liaoning). This is similar to the traditional classification. 【Conclusion】 A high level of genetic diversity was found in the North China population of common apricot. The most abundant genetic diversity was found in the population from the Northwest. The kernel-using apricot has a narrow genetic base, but has more specific alleles and unique ancestry source. The common apricot of the North China population can be divided into three subgroups, and the accessions from the same origin trends to be divided into the same group, with a few exception.

Key words: common apricot (Prunus armeniaca L.), North China populations, genetic diversity, genetic structure

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