Genetic structure of a population of the ectomycorrhizal fungus Russula vinosa in subtropical woodlands in southwest China
Genetic structure of a population of the ectomycorrhizal fungus Russula vinosa in subtropical woodlands in southwest China
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DOI：
10.1007/s00572-003-0260-7
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发表时间：
2004-08-01
期刊：
影响因子：
3.9
通讯作者：
Ma, KP
中科院分区：
文献类型：
--
作者：
Liang, Y;Guo, LD;Ma, KP
使用随机扩增的多态性 DNA 标记分析了外生菌根真菌 Russula vinosa 群体的遗传结构。在121个带中，114个带（94.2%）是多态性的，该种群具有较高的遗传多样性（H=34.98）。每个子实体代表不同的基因，基因大小不大于1 m。距离小于10 m的成对子实体具有显着更高的遗传相似性。二阶分析表明，整个群体和3个遗传群体均存在半径约为20 m的团块，简单匹配相似系数（S-m）分别为0.5-0.6、0.6-0.7和0.7-0.8。高遗传相似性组倾向于具有高密度的小团块，而低遗传相似性组倾向于具有低密度的大团块。空间格局分析表明，种群的传播主要通过短距离孢子扩散，而不是通过双核菌丝体的营养生长或长距离孢子扩散。
The genetic structure of a population of the ectomycorrhizal fungus Russula vinosa was analyzed using random amplified polymorphic DNA markers. Of 121 bands, 114 (94.2%) were polymorphic and there was a high genetic diversity (H=34.98) in this population. Each sporocarp represented a different genet and the genet size was no larger than 1 m. Pairwise sporocarps closer than 10 m had significantly higher genetic similarity. Second-order analysis indicated clumps with a radius of about 20 m in the whole population as well as in three genetic groups, i.e. simple matching similarity coefficients (S-m) 0.5-0.6, 0.6-0.7, and 0.7-0.8, respectively. The high-genetic-similarity group tended to have small clumps with high density, whereas the low-genetic-similarity group tended to have large clumps with low density. The spatial pattern analysis showed that the population mainly spread by short-distance spore dispersal rather than vegetative growth of dicaryophytic mycelia or long-distance spore dispersal.