海南岛青梅AFLP标记的遗传多样性

被引:11
作者
黄久香 [1 ]
黄妃本 [1 ]
许涵 [2 ]
李意德 [2 ]
庄雪影 [1 ]
机构
[1] 华南农业大学林学院
[2] 中国林业科学研究院热带林业研究所
关键词
青梅; AFLP; 遗传多样性; 遗传分化; 保育措施;
D O I
暂无
中图分类号
S662.4 [梅];
学科分类号
090201 [果树学];
摘要
采用AFLP标记检测海南岛青梅7个主要自然居群192株个体的遗传多样性及遗传结构。应用筛选出的6对引物共扩增出频率大于5.00%的位点777个,其中多态位点比例为99.61%(774)。在种级水平上,Nei’s基因多样性指数(H)为0.2661,Shannon多态性信息指数(I)为0.4204;总基因多样度(Ht)为0.2684。居群水平的平均多态性位点数和多态性比例为617个和79.45%;H和I平均值分别为0.2153和0.3352。遗传分化指数(Fst)和基因流(Nm)分别为0.1980和1.0127。UPGMA聚类和遗传距离与空间距离相关性分析结果表明,居群间遗传亲缘关系与其地理位置关系不明显(P=0.2300,r2=0.2325)。综合研究结果表明,青梅具有较高的遗传多样性,居群间有一定的遗传分化。建议采取人工促进天然林下层苗木生长和人工造林等措施,促进现有青梅居群遗传多样性保育和发展。
引用
收藏
页码:46 / 52
页数:7
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