Karyotypes of four catfishes of the genus Mystus Scopoli, 1777 (family Bagridae), M. atrifasciatus Fowler, 1937, M. mysticetus Roberts, 1992, M. singaringan (Bleeker, 1846) and M. wolffii (Bleeker, 1851), were analysed by conventional and Ag-NOR banding as well as fluorescence in situ hybridization (FISH) techniques. Microsatellite d(GC)15, d(CAA)10, d(CAT)10 and d(GAA)10 repeat probes were applied in FISH. The obtained data revealed that the four studied species have different chromosome complements. The diploid chromosome numbers (2n) and the fundamental numbers (NF) range between 52 and 102, 54 and 104, 56 and 98, or 58 and 108 in M. mysticetus, M. atrifasciatus, M. singaringan or M. wolffii, respectively. Karyotype formulae of M. mysticetus, M. atrifasciatus, M. singaringan and M. wolffii are 24m+26sm+4a, 26m+24sm+2a, 24m+18sm+14a and 30m+22sm+6a, respectively. A single pair of NORs was identified adjacent to the telomeres of the short arm of chromosome pairs 3 (metacentric) in M. atrifasciatus, 20 (submetacentric) in M. mysticetus, 15 (submetacentric) in M. singaringan, and 5 (metacentric) in M. wolffii. The d(GC)15, d(CAA)10, d(CAT)10 and d(GAA)10 repeats were abundantly distributed in species-specific patterns. Overall, we present a comparison of cytogenetic and molecular cytogenetic patterns of four species from genus Mystus providing insights into their karyotype diversity in the genus.

中文翻译：

---

来自泰国的四种 Mystus 物种（Bagridae，Siluriformes）的比较研究：对其核型多样性的见解

分析了四种鲶鱼的核型 Mystus Scopoli, 1777 (family Bagridae), M. atrifasciatus Fowler, 1937, M. mysticetus Roberts, 1992, M. singaringan (Bleeker, 1846) 和 M. wolffii (Bleeker, 1851)通过常规和 Ag-NOR 条带以及荧光原位杂交 (FISH) 技术。微卫星 d(GC)15、d(CAA)10、d(CAT)10 和 d(GAA)10 重复探针应用于 FISH。获得的数据显示，四个研究物种具有不同的染色体互补。M. mysticetus、M. atrifasciatus、M. singaringan 或 M. wolffii 的二倍体染色体数 (2n) 和基本数 (NF) 分别介于 52 和 102、54 和 104、56 和 98、或 58 和 108 之间. M. mysticetus、M. atrifasciatus、M. singaringan 和 M. wolffii 的核型公式为 24m+26sm+4a、26m+24sm+2a，分别为 24m+18sm+14a 和 30m+22sm+6a。在 M. atrifasciatus 中染色体对 3（中着丝粒）的短臂端粒附近鉴定出一对 NOR，在 M. mysticetus 中为 20（亚中着丝粒），在 M.singaringan 中为 15（亚中着丝粒）和 5（中着丝粒）在 M. wolffii 中。d(GC)15、d(CAA)10、d(CAT)10 和d(GAA)10 重复以物种特异性模式大量分布。总体而言，我们比较了 Mystus 属的四个物种的细胞遗传学和分子细胞遗传学模式，提供了对该属的核型多样性的见解。d(GC)15、d(CAA)10、d(CAT)10 和d(GAA)10 重复以物种特异性模式大量分布。总体而言，我们比较了 Mystus 属的四个物种的细胞遗传学和分子细胞遗传学模式，提供了对该属的核型多样性的见解。d(GC)15、d(CAA)10、d(CAT)10 和d(GAA)10 重复以物种特异性模式大量分布。总体而言，我们比较了 Mystus 属的四个物种的细胞遗传学和分子细胞遗传学模式，提供了对该属的核型多样性的见解。