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首页> 外文期刊>Zoological Science >Morphological Variation Among Wild Populations of Chinese Rare Minnow (Gobiocypris rarus): Deciphering the Role of Evolutionary Processes
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Morphological Variation Among Wild Populations of Chinese Rare Minnow (Gobiocypris rarus): Deciphering the Role of Evolutionary Processes

机译：中国稀有Min鱼（Gobiocypris rarus）的野生种群之间的形态变异：解释进化过程的作用。

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摘要

Gobiocypris rarus Ye et Fu (1983) is an endemic cyprinid fish in China, and is considered to be an endangered species. From a conservation perspective, its population structure is interesting. In the present study, morphological variation, including morphometric and meristic traits, was assessed among wild samples collected in the upper Yangtze River basin. There were no significant meristic differences between sexes or among populations, except for scales in lateral line (LS). However, there were significant morphometric differences not only between sexes but also among populations. In discriminant function analysis, the first four discriminant functions explained 75.5% and 78% of the among-population morphometric variation for males and females, respectively. Almost all the truss network morphometric traits significantly contributed to population discrimination. By using all of the truss network morphometric traits, overall random assignments of male and female individuals into their original population were both 73.5%. In addition, the degree of differentiation in phenotypic traits (P-ST) significantly exceeds that in neutral molecular markers (F-ST). However, no significant correlation between P-ST and F-ST was found in males or females. Overall, these results suggest that two evolutionary processes, including phenotypic plasticity and natural selection, may contribute to the morphological patterns observed in G. rarus.
机译：Gobiocypris rarus Ye et Fu（1983）是中国特有的鲤科鱼类，被认为是濒危物种。从保护的角度看，其种群结构很有趣。在本研究中，评估了长江上游流域采集的野生样品的形态变异，包括形态和亲缘性状。除了横向线（LS）的比例外，性别之间或人群之间没有明显的差异。但是，不仅在性别之间，而且在人群之间，形态上也存在显着差异。在判别函数分析中，前四个判别函数分别解释了男性和女性的人口形态学变化的75.5％和78％。几乎所有的桁架网络形态特征都对人口歧视做出了重要贡献。通过使用所有的桁架网络形态特征，男性和女性个体在原始人群中的总体随机分配率均为73.5％。此外，表型性状（P-ST）的分化程度大大超过中性分子标记物（F-ST）。然而，在男性或女性中均未发现P-ST和F-ST之间存在显着相关性。总体而言，这些结果表明，包括表型可塑性和自然选择在内的两个进化过程可能有助于在罗氏沼虾中观察到形态学模式。

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