Epigenetic Asymmetry as an Ecological Indicator in Muskrats
Epigenetic Asymmetry as an Ecological Indicator in Muskrats
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表观遗传不对称作为麝香鼠的生态指标
DOI：
10.2307/1380955
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
E. Pankakoski
中科院分区：
文献类型：
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作者：
E. Pankakoski
在九个芬兰麝香鼠 Ondatra zibethicus 种群（n = 555）中研究了头骨中神经孔数量的波动不对称性。动物生长指数（胴体重量/年龄）反映的不对称性种群平均值与栖息地适宜性之间存在高度负相关（r =−0.94）。这种关系在群体内的个体之间较弱。这些结果支持了在胚胎或哺乳期双侧对称结构的正常个体发育同步中应激诱导干扰的观点，尽管这仍需要实验证实。人群之间的遗传差异似乎不可能解释波动的不对称性。
Fluctuating asymmetry in numbers of nerve foramina in the skull was studied in nine Finnish populations of the muskrat, Ondatra zibethicus ( n = 555). A high negative correlation ( r =−0.94) was found between the population means of asymmetry and suitability of habitat as reflected in growth indices (carcass weight/age) of the animals. This relationship is weaker among individuals within populations. The results support the idea of stress-induced interference in the synchronization of normal ontogeny of bilaterally symmetric structures during embryonic or suckling stages, although this still needs to be confirmed experimentally. Genetic differences among populations seem improbable as an explanation of fluctuating asymmetry.