Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification
Abstract The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal rearrangements among its representatives. Studies indicate that translocation and Robertsonian rearrangements have triggered the karyotype evolution in the genus, including differentiation of sex chromosome systems. However, few studies used powerful tools, such as comparative whole chromosome painting, to clarify this highly diversified scenario. Here, we isolated probes from the X1 (a 5S rDNA carrier) and the X2 (a 45S rDNA carrier) chromosomes of Harttia punctata, which displays an X1X1X2X2/X1X2Y multiple sex chromosome system. Those probes were applied in other Harttia species to evidence homeologous chromosome blocks. The resulting data reinforce that translocation events played a role in the origin of the X1X2Y sex chromosome system in H. punctata. The repositioning of homologous chromosomal blocks carrying rDNA sites among ten Harttia species has also been demonstrated. Anchored to phylogenetic data it was possible to evidence some events of the karyotype diversification of the studied species and to prove an independent origin for the two types of multiple sex chromosomes, XX/XY1Y2 and X1X1X2X2/X1X2Y, that occur in Harttia species. The results point to evolutionary breakpoint regions in the genomes within or adjacent to rDNA sites that were widely reused in Harttia chromosome remodeling.
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Sociedade Brasileira de Genética
2022
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oai:scielo:S1415-475720220002002042022-05-18Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversificationDeon,Geize AparecidaGlugoski,LarissaHatanaka,TerumiSassi,Francisco de Menezes CavalcanteNogaroto,VivianeBertollo,Luiz Antonio CarlosLiehr,ThomasAl-Rikabi,AhmedMoreira Filho,OrlandoCioffi,Marcelo de BelloVicari,Marcelo Ricardo Chromosomal rearrangements fish species sex chromosome systems whole chromosome painting Abstract The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal rearrangements among its representatives. Studies indicate that translocation and Robertsonian rearrangements have triggered the karyotype evolution in the genus, including differentiation of sex chromosome systems. However, few studies used powerful tools, such as comparative whole chromosome painting, to clarify this highly diversified scenario. Here, we isolated probes from the X1 (a 5S rDNA carrier) and the X2 (a 45S rDNA carrier) chromosomes of Harttia punctata, which displays an X1X1X2X2/X1X2Y multiple sex chromosome system. Those probes were applied in other Harttia species to evidence homeologous chromosome blocks. The resulting data reinforce that translocation events played a role in the origin of the X1X2Y sex chromosome system in H. punctata. The repositioning of homologous chromosomal blocks carrying rDNA sites among ten Harttia species has also been demonstrated. Anchored to phylogenetic data it was possible to evidence some events of the karyotype diversification of the studied species and to prove an independent origin for the two types of multiple sex chromosomes, XX/XY1Y2 and X1X1X2X2/X1X2Y, that occur in Harttia species. The results point to evolutionary breakpoint regions in the genomes within or adjacent to rDNA sites that were widely reused in Harttia chromosome remodeling.info:eu-repo/semantics/openAccessSociedade Brasileira de GenéticaGenetics and Molecular Biology v.45 n.2 20222022-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572022000200204en10.1590/1678-4685-gmb-2021-0170 |
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Deon,Geize Aparecida Glugoski,Larissa Hatanaka,Terumi Sassi,Francisco de Menezes Cavalcante Nogaroto,Viviane Bertollo,Luiz Antonio Carlos Liehr,Thomas Al-Rikabi,Ahmed Moreira Filho,Orlando Cioffi,Marcelo de Bello Vicari,Marcelo Ricardo |
| spellingShingle |
Deon,Geize Aparecida Glugoski,Larissa Hatanaka,Terumi Sassi,Francisco de Menezes Cavalcante Nogaroto,Viviane Bertollo,Luiz Antonio Carlos Liehr,Thomas Al-Rikabi,Ahmed Moreira Filho,Orlando Cioffi,Marcelo de Bello Vicari,Marcelo Ricardo Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| author_facet |
Deon,Geize Aparecida Glugoski,Larissa Hatanaka,Terumi Sassi,Francisco de Menezes Cavalcante Nogaroto,Viviane Bertollo,Luiz Antonio Carlos Liehr,Thomas Al-Rikabi,Ahmed Moreira Filho,Orlando Cioffi,Marcelo de Bello Vicari,Marcelo Ricardo |
| author_sort |
Deon,Geize Aparecida |
| title |
Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| title_short |
Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| title_full |
Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| title_fullStr |
Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| title_full_unstemmed |
Evolutionary breakpoint regions and chromosomal remodeling in Harttia (Siluriformes: Loricariidae) species diversification |
| title_sort |
evolutionary breakpoint regions and chromosomal remodeling in harttia (siluriformes: loricariidae) species diversification |
| description |
Abstract The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal rearrangements among its representatives. Studies indicate that translocation and Robertsonian rearrangements have triggered the karyotype evolution in the genus, including differentiation of sex chromosome systems. However, few studies used powerful tools, such as comparative whole chromosome painting, to clarify this highly diversified scenario. Here, we isolated probes from the X1 (a 5S rDNA carrier) and the X2 (a 45S rDNA carrier) chromosomes of Harttia punctata, which displays an X1X1X2X2/X1X2Y multiple sex chromosome system. Those probes were applied in other Harttia species to evidence homeologous chromosome blocks. The resulting data reinforce that translocation events played a role in the origin of the X1X2Y sex chromosome system in H. punctata. The repositioning of homologous chromosomal blocks carrying rDNA sites among ten Harttia species has also been demonstrated. Anchored to phylogenetic data it was possible to evidence some events of the karyotype diversification of the studied species and to prove an independent origin for the two types of multiple sex chromosomes, XX/XY1Y2 and X1X1X2X2/X1X2Y, that occur in Harttia species. The results point to evolutionary breakpoint regions in the genomes within or adjacent to rDNA sites that were widely reused in Harttia chromosome remodeling. |
| publisher |
Sociedade Brasileira de Genética |
| publishDate |
2022 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572022000200204 |
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