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Position: Home > Articles > Population genetic structure of Oidium heveae from rubber tree in Hainan Province Plant Protection 2019 (2) 121-124

海南橡胶树白粉菌的群体遗传结构研究

作  者：
曹学仁;车海彦;罗大全
单  位：
中国热带农业科学院环境与植物保护研究所农业农村部热带作物有害生物综合治理重点实验室
关键词：
橡胶树白粉病;橡胶树粉孢;ITS序列;群体遗传结构
摘  要：
白粉病是海南橡胶树上发生最严重的叶部病害,为了明确海南橡胶树白粉菌群体的遗传结构,本研究对海南7个市(县)的橡胶树白粉菌的ITS序列进行分析。结果表明,95个病菌样品可推导出5种单倍型,其中单倍型H1包含样品数为88个,且在7个市(县)均有分布;三亚种群的单倍型多样性和核苷酸多样性最高。总体和各地理群体的中性检验结果显示,群体扩张遵循中性进化,群体大小保持相对稳定。遗传分化指数(Fst)表明三亚种群与白沙、儋州、海口和琼中等四市(县)种群的遗传分化较大。AMOVA分析显示,遗传变异主要发生在种群内,占总变异的89.66%。因此海南橡胶树白粉菌菌株间虽存在一定的遗传分化,但整体遗传多样性偏低。
译  名：
Population genetic structure of Oidium heveae from rubber tree in Hainan Province
作  者：
CAO Xueren;CHE Haiyan;LUO Daquan;Institute of Environmental and Plant Protection,China Academy of Tropic Agricultural Sciences;Key Laboratory of Integrated Pest Management on Tropical Crops,Ministry of Agriculture and Rural Affairs;
单  位：
CAO Xueren%CHE Haiyan%LUO Daquan%Institute of Environmental and Plant Protection,China Academy of Tropic Agricultural Sciences%Key Laboratory of Integrated Pest Management on Tropical Crops,Ministry of Agriculture and Rural Affairs
关键词：
rubber tree powdery mildew;;Oidium heveae;;ITS sequence;;population genetic structure
摘  要：
Powdery mildew, caused by Oidium heveae, is the most serious leaf disease of rubber tree in Hainan. To clarify the population genetic structure of O. heveae from rubber tree in Hainan Province, ITS sequences of 95 O. heveae strains from rubber tree in seven counties were analyzed in this study. The results showed that 5 haplotypes were identified. Eighty-eight strains were considered to be Haplotype 1 which was distributed in all sampled counties. Strains sampled from Sanya had the highest haplotype diversity(Hd) and nucleotide diversity(Pi). Neutrality test on all samples for each population showed that population expansion followed the neutral theory of molecular evolution and the population size remained relatively stable. The genetic differentiation index, Fst, revealed significant genetic differentiation between Sanya and Baisha, Danzhou, Haikou, and Qiongzhong populations. AMOVA test showed that the genetic differentiation mainly occurred within populations, which accounted for 89.66% of the genetic differentiation. Therefore,genetic differentiation has taken place to some extent in O. heveae from Hainan, but the genetic diversity of O. heveae from Hainan was still not high.

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