Particular Structure of Plasmopara viticola Populations Evolved Under Greek Island Conditions.
Particular Structure of Plasmopara viticola Populations Evolved Under Greek Island Conditions.
复制标题
希腊岛屿条件下葡萄生单轴霉种群进化的特殊结构。
DOI：
10.1094/phyto-96-0501
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发表时间：
2006
期刊：
影响因子：
3.2
通讯作者：
C. Gessler
中科院分区：
文献类型：
--
作者：
A. Rumbou;C. Gessler
摘要利用微卫星分子标记对采自希腊西部地中海的爱奥尼亚海三个岛屿的葡萄生单轴霉种群进行了分析，以研究葡萄生单轴霉的种群结构。大陆地区的霜霉病种群遗传多样性较高，克隆性有限，而地中海岛屿地区的霜霉病种群遗传多样性有限，流行主要由一个或几个基因型的多克隆感染所驱动。来自不同岛屿的种群之间存在一定的分化，而同一地块内的亚种群之间也存在遗传分化。在某些情况下观察到多倍体个体和以无性形式越冬的个体。这项群体遗传学研究的结果提高了我们对病原体生物学的理解，并为该疾病提供了潜在的替代控制措施。
ABSTRACT Plasmopara viticola populations collected from three islands in the Ionian Sea-an arm of the Mediterranean Sea to the west of Greece-were analyzed with microsatellite molecular markers in order to investigate the pathogen population structure. Downy mildew populations from mainland regions previously studied were found to have high genotypic diversity and limited clonality; however, populations under Mediterranean island conditions mostly showed limited variation and the epidemics basically were driven by the multiple clonal infections of one or a few genotypes. Populations from different islands were differentiated from each other, whereas genetic divergence also was found among subpopulations of the same plot. Polyploid individuals and individuals that overwintered in asexual form were observed in some cases. The findings obtained by this population genetics study improve our understanding of the biology of the pathogen and lead to potential alternative control measures for the disease.