| 摘要: |
| 采用RAPD PCR方法探讨广西3个不同生境下桐花树种群的遗传多样性和遗传分化。结果表明：3个不同生境桐花树RAPD扩增多态百分率为20.2%，3个不同生境桐花树种群两两之间的遗传距离分别为0.195、0.169、0.26，平均遗传距离为0.208。同一种群不同个体的扩增多态百分率最高为37.28%，其次为20.93%，最小的为19.32%。Shannon’s遗传多样性指数3个种群分别为0.331、0.225和0.17，其大小顺序与多态百分率的结果一致。种群内遗传多样性比率为62.3%，种群间遗传多样性比率为37.7%。说明广西3个不同生境的桐花树种群的遗传变异大部分存在种群内，种群间遗传变异较小。 |
| 关键词: 红树林 桐花树 种群 遗传距离 遗传多样性 RAPD |
| DOI： |
| 分类号:Q948 |
| 基金项目: |
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| Study on genetic diversity of mangrove plant Aegiceras corniculatum populations in Guangxi |
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PAN Wen1， LI YuanYue2*， CHEN Pan3， ZHOU HanTao3， LIN Peng3
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1.College of Bioengineering， Jimei University， Xiamen 361021， China;2.College of Fisheries， Jimei University， Xiamen 361021， China;3．School of Life Sciences， Xiamen University， Xiamen 361005， China
1.College of Bioengineering， Jimei University， Xiamen 361021， China； 2.College of Fisheries， Jimei University， Xiamen 361021， China； 3．School of Life Sciences， Xiamen University， Xiamen 361005， China
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| Abstract: |
| RAPD PCR markers were used to investigate the genetic diversity and genetic differentiation among 3 populations with different habitats of Aegiceras corniculatum in Guanxi. The results showed that percentage of polymorphic band was 20.2%，and genetic distances among 3 A.corniculatum populations were 0.195，0.169 and 0.26，respectively，and 0.208 on average. The percentage of polymorphic band and Shonnon’s diversity index among individuals within the same population had the same trend，and each was 37.28% and 0.331，20.93% and 0.225，19.32% and 0.17. A large proportion of genetic variance(62.3%)of A.corniculatum was among individuals within population，while only 37.7% genetic variance was among populations. |
| Key words: angrove Aegiceras corniculatum populations genetic distances genetic diversity RAPD |
