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首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Karyotype Analysis of the New Catfish Mystus ngasep (Siluriformes: Bagridae) from Manipur, India
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Karyotype Analysis of the New Catfish Mystus ngasep (Siluriformes: Bagridae) from Manipur, India

机译：印度曼尼普尔邦的新型Man鱼Mystus ngasep（Siluriformes：Bagridae）的核型分析

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摘要

Karyotypic and cytogenetic characteristics of catfish Mystus ngasep, a new species of bagrid catfish described from the Northeast India, Manipur was studied for the first time by examining 200 metaphase spreads chromosome from the kidney cells of 25 healthy specimens. The diploid chromosome number of this species was 2n=56 and the total fundamental arm number was determined as NF=90. The karyotype consisted of 12 Metacentric (m), 22 Submetacentric (Sm), 8 Subtelocentric (St) and 14 Telocentric (t) chromosomes. The chromosome formula can be represented as 2n= 12m + 22Sm + 8St + 14t. No heteromorphic sex chromosomes were cytologically detected. Chromosome number, formula and karyotype of Mystus ngasep differentiate it from other closely related species. The largest chromosome in this species is a pair of metacentric chromosomes and the present study is the first report on the karyology of this particular species which will pave the way for the future studies on this line of karyology for this genus. Thus, this study is of importance in the analysis of karyotypic evolutionary trends, classification and taxonomy of the genus Mystus and better understanding of the karyotype diversity and chromosome evolution processes.
机译：examining鱼Mystus ngasep的核型和细胞遗传学特征，是印度东北部Manipur描述的一种新的袋状cat鱼，通过检查25个健康标本的肾脏细胞中的200个中期扩散染色体来进行首次研究。该物种的二倍体染色体数为2n = 56，总基本臂数确定为NF = 90。核型由12个亚中心（m），22个亚中心（Sm），8个亚中心（St）和14个中心（t）染色体组成。染色体公式可以表示为2n = 12m + 22Sm + 8St + 14t。细胞学上未检测到异型性染色体。纳豆酶的染色体数目，分子式和核型使它与其他密切相关的物种区别开来。该物种中最大的染色体是一对亚中心染色体，本研究是关于该特定物种的染色体学的首次报道，这将为该属的该领域的未来研究铺平道路。因此，本研究对于分析Mystus属的核型进化趋势，分类和分类学以及更好地了解核型多样性和染色体进化过程具有重要意义。

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