Environmental gradients structure Daphnia pulex × pulicaria clonal distribution
Environmental gradients structure Daphnia pulex × pulicaria clonal distribution
复制标题
环境梯度结构 水蚤 × 水蚤克隆分布
DOI：
10.1111/j.1420-9101.2010.02196.x
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发表时间：
2011
影响因子：
2.1
通讯作者：
M. Leibold
中科院分区：
文献类型：
--
作者：
J. Pantel;T. Juenger;M. Leibold
真核生物无性繁殖的罕见性通常归因于相对于有性繁殖而言遗传变异减少的缺点。然而，从有性祖先反复进化而来的孤雌生殖谱系可以产生表型多样性克隆的区域池。各种理论来解释这种遗传多样性的维持，作为环境和空间异质性的结果[冻结生态位变异（FNV），通用基因型]在概念上类似于社区生态学解释区域物种多样性的维持。采用群落生态学研究中常用的多元统计方法对淡水甲壳动物蚤状蚤（Daphnia pulex × pulicaria）的种群遗传结构进行了研究。 这种单性生殖的杂交后代是由有性生殖的祖先反复进化而来的。 蚤状蚤和蚤状蚤种群间存在显著的遗传变异，各池塘的克隆组成与营养水平和捕食性无脊椎动物密度相对应。 FNV假说所描述的克隆间选择过程可能构成了我们的D。 蚤属种群
The rarity of eukaryotic asexual reproduction is frequently attributed to the disadvantage of reduced genetic variation relative to sexual reproduction. However, parthenogenetic lineages that evolved repeatedly from sexual ancestors can generate regional pools of phenotypically diverse clones. Various theories to explain the maintenance of this genetic diversity as a result of environmental and spatial heterogeneity [frozen niche variation (FNV), general‐purpose genotype] are conceptually similar to community ecological explanations for the maintenance of regional species diversity. We employed multivariate statistics common in community ecological research to study population genetic structure in the freshwater crustacean, Daphnia pulex × pulicaria. This parthenogenetic hybrid arose repeatedly from sexual ancestors. Daphnia pulex × pulicaria populations harboured substantial genetic variation among populations and the clonal composition at each pond corresponded to nutrient levels and invertebrate predator densities. The interclonal selection process described by the FNV hypothesis likely structured our D. pulex × pulicaria populations.
影响因子：
3.1
作者：
KONDRASHOV, AS
通讯作者：
KONDRASHOV, AS