First evidence of inbreeding, relatedness and chaotic genetic patchiness in the holoplanktonic jellyfish Pelagia noctiluca (Scyphozoa, Cnidaria).
First evidence of inbreeding, relatedness and chaotic genetic patchiness in the holoplanktonic jellyfish Pelagia noctiluca (Scyphozoa, Cnidaria).
复制标题
全繁殖，关联性和混乱的遗传斑块中的第一个证据证明了holoplanktonic水母pelagia noctiluca（scyphozoa，cnidaria）。
DOI：
10.1371/journal.pone.0099647
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Piraino S
中科院分区：
文献类型：
--
作者：
Aglieri G;Papetti C;Zane L;Milisenda G;Boero F;Piraino S
遗传漂移和非随机交配很少影响繁殖种群大和扩散潜力高的物种，其特征是非结构化基因库和低于个体最小扩散范围的泛混合。本研究开发了一套9个微卫星标记，并利用该标记研究了南第勒尼安海全浮游水母夜光水母的时空遗传格局。在8个座位上检测到纯合子过量，至少有3个样本的个体表现出比预期更高的群体内亲缘关系。这一结果得到了至少5个样本中兄弟姐妹的存在的支持，其中4个样本除了半同胞二聚体外还含有全同胞。在测试并排除了作为无效等位基因的替代解释后，我们的结果表明，正如种群遗传学分析的结果所指出的那样，生殖和行为特征在塑造夜光夜蛾遗传结构方面的影响。事实上，种群间的遗传分化在全球范围内很小，但突出了：a)空间遗传斑块与采样地点之间的距离无关，b)不同年份在同一地点收集的样本之间存在显著的遗传异质性。因此，尽管有极大的扩散潜力，夜光海蜇并不保持单一的同质种群，而是这些水母似乎具有花内局部招募和/或个体凝聚力，因此兄弟姐妹更有可能聚集在一起，作为一个单一的群体，并在产卵事件后保持密切关系。这些发现首次提供了在整个生命周期中具有高度分散潜力的物种的家庭结构和随之而来的遗传斑块的证据，有助于理解海洋环境中的扩散和连通性模式。
Genetic drift and non-random mating seldom influence species with large breeding populations and high dispersal potential, characterized by unstructured gene pool and panmixia at a scale lower than the minimum dispersal range of individuals. In the present study, a set of nine microsatellite markers was developed and used to investigate the spatio-temporal genetic patterns of the holoplanktonic jellyfish Pelagia noctiluca (Scyphozoa) in the Southern Tyrrhenian Sea. Homozygote excess was detected at eight loci, and individuals exhibited intra-population relatedness higher than expected by chance in at least three samples. This result was supported by the presence of siblings in at least 5 out 8 samples, 4 of which contained full-sib in addition to half-sib dyads. Having tested and ruled out alternative explanations as null alleles, our results suggest the influence of reproductive and behavioural features in shaping the genetic structure of P. noctiluca, as outcomes of population genetics analyses pointed out. Indeed, the genetic differentiation among populations was globally small but highlighted: a) a spatial genetic patchiness uncorrelated with distance between sampling locations, and b) a significant genetic heterogeneity between samples collected in the same locations in different years. Therefore, despite its extreme dispersal potential, P. noctiluca does not maintain a single homogenous population, but rather these jellyfish appear to have intra-bloom localized recruitment and/or individual cohesiveness, whereby siblings more likely swarm together as a single group and remain close after spawning events. These findings provide the first evidence of family structures and consequent genetic patchiness in a species with highly dispersive potential throughout its whole life cycle, contributing to understanding the patterns of dispersal and connectivity in marine environments.
登录
查看更多内容
影响因子：
2.4
作者：
Calderon, I.;Pita, Lucia;Turon, X.
通讯作者：
Turon, X.
影响因子：
1.9
作者：
CHAKRABORTY, R;DEANDRADE, M;BUDOWLE, B
通讯作者：
BUDOWLE, B
DOI：
10.2307/1350339
发表时间：
1967-01-01
期刊：
CHESAPEAKE SCI
影响因子：
--
作者：
CARGO, DAVID G.;SCHULTZ, LEONARD P.
通讯作者：
SCHULTZ, LEONARD P.
影响因子：
2.7
作者：
Abdelkrim, Jawad;Robertson, Bruce C.;Gemmell, Neil J.
通讯作者：
Gemmell, Neil J.
DOI：
10.1111/j.1439-0485.1994.tb00038.x
发表时间：
1994-01-01
期刊：
MARINE ECOLOGY-PUBBLICAZIONI DELLA STAZIONE ZOOLOGICA DI NAPOLI I
影响因子：
--
作者：
BOERO, F
通讯作者：
BOERO, F