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首页> 外文期刊>Plant Pathology >Genetic structure of Mycosphaerella fijiensis populations from Australia,Papua new Guinea and the Pacific Islands
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Genetic structure of Mycosphaerella fijiensis populations from Australia,Papua new Guinea and the Pacific Islands

机译：澳大利亚，巴布亚新几内亚和太平洋岛屿的斐济分枝杆菌的遗传结构

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摘要

Single-copy restriction fragment length polymorphism(RFLP)markers were used to determine te genetic structure of Mycosphaerella fijiensis,the cause of black leaf streak (black Sigatoka)disease of banana and plantain,in the Torres strait,Papua New Guinea (PNG),and the pacific Islands.A moderate level of genetic variation was obserdved in al populations with genotypic diversity values of 60-78% of the theoretical maximum,and gene diversity (H)values between 0centre dot269 and 0centre dot336.All populations were at gametic equilibrium,and with the high level of genotypi diversity observed this indicated that sexual reproductin has a major role in the genetic structure of the M.fijiensis populations examined.Population differentiation was tested on several hierarchical scales.No evidence of population differentiation was observed between sites on mer Island.A moderate level of population differentiation was observed within the Torres strait,between Badu and Mer Islands (F_ST=0.097).On a reginal scale,the greatest differentiation was found between the populations of the Torres Strait and the Pacific.Populations from these regions were more closely related to the PNG populatin than to each other,suggesting they were founded in separate events from the same population.
机译：单拷贝限制性片段长度多态性（RFLP）标记用于确定斐济支原体的遗传结构，即香蕉和车前草黑叶条纹（黑Sigatoka）病的病因，在巴布亚新几内亚的托雷斯海峡，在所有种群中均观察到中等水平的遗传变异，其基因型多样性值是理论最大值的60-78％，基因多样性（H）值介于0centdot269和0centre dot336之间。所有种群均处于配子平衡状态，并观察到高水平的基因型多样性，这表明有性生殖素在所调查的斐济摩根氏菌种群的遗传结构中起着主要作用。在几个层次上对种群分化进行了测试。梅尔岛。巴杜岛和梅尔岛之间的托雷斯海峡内观察到中等程度的人口分化（F_ST = 0.097）。从人口规模上看，在托雷斯海峡和太平洋的种群之间存在最大的差异。这些地区的种群与巴布亚新几内亚人口之间的联系更为密切，而不是彼此相关，建议它们是在同一种群的不同事件中建立的。

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