关键词: 杏, 遗传多样性, SRAP标记, 伊犁河谷, 遗传结构

Abstract:

The genetic diversity of 14 wild apricot populations which include 212 apricot germplasms in the Ili Valley were detected using SRAP markers. The results showed that 12 primers amplification out 143 bands，122 bands are polymorphic，as a ratio of 85.31%. The wild apricots in the Ili Valley still maintained a relatively high level of diversity（h = 0.2411，I = 0.3708，PPB = 85.31%）and populations Tu with the highest diversity. A relatively high intraspecific genetic diversity（76.42%）and low inter-population genetic differentiation was identi?ed with the moderate gene ?ow value（N_m = 1.3680）. The UPGMA and genetic structure analysis both showed that 14 wild apricot populations can be divided into predominantly Huocheng samples in subgroupⅠ，predominantly Gongliu and Yining samples in subgroup Ⅱ and predominantly Xinyuan samples in subgroup Ⅲ，and there is significant correlation  between genetic distance and geographic distance（r = 0.2634，P < 0.05）.

Key words: apricot, genetic diversity, SRAP marker, Ili Valley, genetic structure