Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”)
Abstract The Cyprinidae family is a highly diversified but demonstrably monophyletic lineage of cypriniform fishes. Among them, the genus Osteochilus contains 35 recognized valid species distributed from India, throughout Myanmar, Laos, Thailand, Malaysia, Indonesian archipelago to southern China. I...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Genética
2020-11-01
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| Series: | Genetics and Molecular Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000600206&tlng=en |
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| author | Pasakorn Saenjundaeng Weerayuth Supiwong Francisco M. C. Sassi Luiz A. C. Bertollo Petr Rab Rafael Kretschmer Alongklod Tanomtong Chatmongkon Suwannapoom Montri Reungsing Marcelo de Bello Cioffi |
| author_facet | Pasakorn Saenjundaeng Weerayuth Supiwong Francisco M. C. Sassi Luiz A. C. Bertollo Petr Rab Rafael Kretschmer Alongklod Tanomtong Chatmongkon Suwannapoom Montri Reungsing Marcelo de Bello Cioffi |
| author_sort | Pasakorn Saenjundaeng |
| collection | DOAJ |
| description | Abstract The Cyprinidae family is a highly diversified but demonstrably monophyletic lineage of cypriniform fishes. Among them, the genus Osteochilus contains 35 recognized valid species distributed from India, throughout Myanmar, Laos, Thailand, Malaysia, Indonesian archipelago to southern China. In this study, karyotypes and other chromosomal characteristics of five Osteochilus species occurring in Thailand, namely O. lini, O. melanopleura, O. microcephalus, O. vittatus and O. waandersii were examined using conventional and molecular cytogenetic protocols. Our results showed they possessed diploid chromosome number (2n) invariably 2n = 50, but the ratio of uni- and bi-armed chromosomes was highly variable among their karyotypes, indicating extensive chromosomal rearrangements. Only one chromosome pair bearing 5S rDNA sites occurred in most species, except O. melanopleura, where two sites were detected. In contrast, only one chromosomal pair bearing 18S rDNA sites were observed among their karyotypes, but in different positions. These cytogenetic patterns indicated that the cytogenomic divergence patterns of these Osteochilus species were largely corresponding to the inferred phylogenetic tree. Similarly, different patterns of the distributions of rDNAs and microsatellites across genomes of examined species as well as their different karyotype structures indicated significant evolutionary differentiation of Osteochilus genomes. |
| first_indexed | 2024-12-23T19:08:25Z |
| format | Article |
| id | doaj.art-a56263855fc64ca8adea8684a1eae80e |
| institution | Directory Open Access Journal |
| issn | 1678-4685 |
| language | English |
| last_indexed | 2024-12-23T19:08:25Z |
| publishDate | 2020-11-01 |
| publisher | Sociedade Brasileira de Genética |
| record_format | Article |
| series | Genetics and Molecular Biology |
| spelling | doaj.art-a56263855fc64ca8adea8684a1eae80e2022-12-21T17:34:33ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1678-46852020-11-0143410.1590/1678-4685-gmb-2020-0195Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”)Pasakorn SaenjundaengWeerayuth SupiwongFrancisco M. C. SassiLuiz A. C. BertolloPetr RabRafael Kretschmerhttps://orcid.org/0000-0002-6856-2152Alongklod TanomtongChatmongkon SuwannapoomMontri ReungsingMarcelo de Bello Cioffihttps://orcid.org/0000-0003-4340-1464Abstract The Cyprinidae family is a highly diversified but demonstrably monophyletic lineage of cypriniform fishes. Among them, the genus Osteochilus contains 35 recognized valid species distributed from India, throughout Myanmar, Laos, Thailand, Malaysia, Indonesian archipelago to southern China. In this study, karyotypes and other chromosomal characteristics of five Osteochilus species occurring in Thailand, namely O. lini, O. melanopleura, O. microcephalus, O. vittatus and O. waandersii were examined using conventional and molecular cytogenetic protocols. Our results showed they possessed diploid chromosome number (2n) invariably 2n = 50, but the ratio of uni- and bi-armed chromosomes was highly variable among their karyotypes, indicating extensive chromosomal rearrangements. Only one chromosome pair bearing 5S rDNA sites occurred in most species, except O. melanopleura, where two sites were detected. In contrast, only one chromosomal pair bearing 18S rDNA sites were observed among their karyotypes, but in different positions. These cytogenetic patterns indicated that the cytogenomic divergence patterns of these Osteochilus species were largely corresponding to the inferred phylogenetic tree. Similarly, different patterns of the distributions of rDNAs and microsatellites across genomes of examined species as well as their different karyotype structures indicated significant evolutionary differentiation of Osteochilus genomes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000600206&tlng=enFish cytogeneticskaryotype evolutionrepetitive DNAsThai ichthyofauna |
| spellingShingle | Pasakorn Saenjundaeng Weerayuth Supiwong Francisco M. C. Sassi Luiz A. C. Bertollo Petr Rab Rafael Kretschmer Alongklod Tanomtong Chatmongkon Suwannapoom Montri Reungsing Marcelo de Bello Cioffi Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) Genetics and Molecular Biology Fish cytogenetics karyotype evolution repetitive DNAs Thai ichthyofauna |
| title | Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) |
| title_full | Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) |
| title_fullStr | Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) |
| title_full_unstemmed | Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) |
| title_short | Chromosomes of Asian cyprinid fishes: Variable karyotype patterns and evolutionary trends in the genus Osteochilus (Cyprinidae, Labeoninae, “Osteochilini”) |
| title_sort | chromosomes of asian cyprinid fishes variable karyotype patterns and evolutionary trends in the genus osteochilus cyprinidae labeoninae osteochilini |
| topic | Fish cytogenetics karyotype evolution repetitive DNAs Thai ichthyofauna |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000600206&tlng=en |
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