Degree of intraspecific genetic divergence and variability in three Sciaenid species
Degree of intraspecific genetic divergence and variability in three Sciaenid species
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三个 Sciaenid 物种的种内遗传分化和变异程度
DOI：
10.11369/jji1950.37.39
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Shingo Seki
中科院分区：
文献类型：
--
作者：
M. R. Menezes;N. Taniguchi;Shingo Seki
摘要 采用电泳法分析了不同产地的水母鱼、白鱼鱼和银鱼的遗传变异。 N. mirsukurii 的遗传变异性相对较高。根据两地异质性卡方值和遗传距离（D）值，将有明海和内海或东海的白花猪笼草（平均D=O.OO92）和土佐湾VS渥美湾的米苏库里猪笼草（D=~O.OO67）视为独立亚群，内海VS华东的白花猪笼草D值海洋很小(D=0.0010)，在P. argenrara种群中，D值也很小。此外，还讨论了在这三个物种中观察到的遗传距离和地理距离之间的关系，与 N. mirsukurii 或 N, albifiora 相比，P. argenrata 在这两个因素之间显示出正相关关系。看来遗传分化水平较低可能是由于种群规模大、分布范围广，基因流动频繁。在过去的十年中，凝胶电泳与选择性酶染色相结合的应用表明，许多物种的自然种群中存在大量遗传变异（Allen dorf 和 Utter，1979）。等位酶的表型可以在其生命周期的大多数阶段进行评分，并且其遗传学比鱼类分类学中使用的比例和分数特征更容易解释。可以想象，由于亚种群内迁移的基因流动，特定水域内种群之间的遗传差异可能会随着时间的推移而减少。或者，随着时间的推移，遗传分化可能会变得更加明显，这可能是因为亚种群与离散繁殖区域的联系越来越紧密（Felley 和 Avise，1980）。石首鱼科鱼类对世界温暖浅海和河口的渔业做出了巨大贡献。 Nibea mitsukurii（Jordan et Snyder）俗称nibe croak er，沿着太平洋海岸从北部的仙台湾延伸到南部的日向盆地（一个开放的海湾）。 Nibea albiflora (Richardson)，俗称roncader，分布于香港、东海以及向北至旅顺港和日本南部。 Pennahia argentata (Houttuyn)，俗称白鱼，广泛分布于日本、韩国和中国水域（Trewavas，1977）。
Abstrllct Genetic variations in Nibea mitsukurii, N. albijfora and Pennahia argentara from different localities were assayed electrophoretically. The genetic variability in N. mirsukurii was relatively high. According to the chi-square values for heterogeneity between two localities and genetic distance (D) values, N. albijfora from the Ariake Sea and the Inland Sea or the East China Sea (D=O.OO92 in average), and N. misukurii, from Tosa Bay vs, Atsumi Bay (D=~O.OO67) were considered to be independent subpopulations, The D value in N. albifiora from the Inland Sea VS, the East China Sea was quite small (D=O.OOlO), In P. argenrara populations, the D values were also small. Further, the relationship between genetic and geographic distances observed in the three species were discussed, P. argenrata showed a positive relationship between these two factors as compared to N. mirsukurii or N, albifiora. It seemed that the lower level of genetic divergence might be due to the frequent gene flow within the large-scale and wide distributional range of the population. During the past decade the application of gel electrophoresis coupled with selective enzyme stain ing has shown that a large amount genetic variation exists in natural populations of many species (Allen dorf and Utter, 1979). Phenotypes of allozyme can be scored during most stages of their life cycle and their genetics more easily interpreted than the pro portional and meristic characters employed in fish taxonomy. Genetic differences among populations within a defined body of water may conceivably decrease with time, due to gene flow by migration within sub populations. Alternatively, genetic differentiation could become· accentuated through time, perhaps because subpopulations become increasingly associ ated with discrete breeding areas (Felley and Avise, 1980). The fishes of the family Sciaenidae contribute sub stantially to the fisheries of the warm and shallow seas and estuaries of the world. Nibea mitsukurii (Jordan et Snyder) commonly known as nibe croak er, extends along the coast of the Pacific Ocean from Sendai Bay in the north to Hyuga Basin (an open bay) in the south. Nibea albiflora (Richardson), commonly known as roncader, occurs in Hong kong, the East China Sea and northwards to Port Arthur and southern Japan. Pennahia argentata (Houttuyn), commonly known as white croaker, is widely distributed in Japanese, Korean and Chinese waters (Trewavas, 1977).