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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Induction of embryonic dormancy in the calanoid copepod Acartia hudsonica: heritability and phenotypic plasticity in two geographically separated populations
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Induction of embryonic dormancy in the calanoid copepod Acartia hudsonica: heritability and phenotypic plasticity in two geographically separated populations

机译：the足类pe足类螨中胚胎休眠的诱导：两个地理上分离的群体的遗传力和表型可塑性

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摘要

The planktonic copepod Acartia hudsonica apparently requires summer diapause or dormancy to persist in Narragansett Bay, RI. In estuaries to the north, however, active A. hudsonica populations are present year-round and may not express dormancy. Using a full-sibling rearing design and analysis of variance (ANOVA), I assessed the importance of phenotypic and genetic sources of variation in two geographically separate populations, one from Maine and one from Rhode Island. Both populations showed phenotypic plasticity in the percentage of dormant eggs produced. Moreover, experiments revealed significant sibship-environment interactions in both populations, indicating that the phenotypic plasticity has a genetic component. Both populations also revealed a significant amount of genetic variation in the percentage of dormant eggs produced. For the Maine population, broad sense heritability was high (0.91, 1.10) in two short-day (12L:12D) treatments and near zero (0.08) in the long-day treatment (15L∶9D). For a Rhode Island population, broad sense heritability was higher (0.95) in a low-temperature short-day treatment (13.5℃, 12L∶12D) than in a high-temperature short-day treatment (17.5℃, 12L∶12D; h~2=0.25).
机译：浮游的pe足类A螨明显需要夏天滞育或休眠才能在罗纳德州纳拉甘西特湾持续。然而，在北部的河口，活跃的拟南芥种群全年存在，可能未表现出休眠状态。通过使用全同胞饲养设计和方差分析（ANOVA），我评估了两个地理上分离的种群（一个来自缅因州，一个来自罗德岛州）的表型和遗传来源的重要性。两种种群在产生的休眠卵的百分比中均表现出表型可塑性。此外，实验揭示了两个种群中显着的同胞关系-环境相互作用，表明表型可塑性具有遗传成分。两种种群还揭示了休眠卵产生百分比的显着遗传变异。对于缅因州人群，两种短日治疗（12L：12D）的广义遗传力较高（0.91，1.10），而长日治疗（15L∶9D）的广义遗传力接近零（0.08）。对于罗得岛人口，低温短日处理（13.5℃，12L∶12D）的广义遗传力高于高温短日处理（17.5℃，12L∶12D； h）（h = 0.95）； h 〜2 = 0.25）。

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