{"id":481,"date":"2018-10-01T07:48:29","date_gmt":"2018-10-01T10:48:29","guid":{"rendered":"https:\/\/lageevo.crp.ufv.br\/?p=481"},"modified":"2018-10-12T06:03:42","modified_gmt":"2018-10-12T09:03:42","slug":"the-persevering-cytotaxonomy-discovery-of-a-unique-xx-xy-sex-chromosome-system-in-catfishes-suggests-the-existence-of-a-new-endemic-and-rare-species","status":"publish","type":"post","link":"https:\/\/lageevo.crp.ufv.br\/?p=481","title":{"rendered":"The Persevering Cytotaxonomy: Discovery of a Unique XX\/XY Sex Chromosome System in Catfishes Suggests the Existence of a New, Endemic and Rare Species"},"content":{"rendered":"<p>[:pb]Rocha-Reis D.A., de Oliveira Brand\u00e3o K., de Almeida-Toledo L.F., Pazza R., Kavalco K.F.<\/p>\n<p>The genus\u00a0<i>Hypostomus<\/i>\u00a0has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that\u00a0<i>Hypostomus<\/i><i>ancistroides<\/i>\u00a0represents a species complex in the Upper Paran\u00e1 River basin. In this paper, an unusual karyotype of an isolated\u00a0<i>H.<\/i>\u00a0aff.\u00a0<i>ancistroides<\/i>\u00a0population was investigated. All specimens of this sample have 2n = 66 chromosomes except for 1 male with 2n = 67, most likely due to a supernumerary chromosome. In this population, the sexes are dimorphic, the males are heterogametic, and an XX\/XY sex chromosome system is present. Phylogenetic analysis using mitochondrial and nuclear DNAs indicated that this population forms a monophyletic group separate from the other populations of\u00a0<i>H.<\/i><i>ancistroides<\/i>\u00a0and may represent an incipient species.<\/p>\n<p><em><strong>Cytogenetic and Genome Research<\/strong><\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1159\/000492959\">https:\/\/doi.org\/10.1159\/000492959<\/a>[:en]<strong>The Persevering Cytotaxonomy: Discovery of a Unique XX\/XY Sex Chromosome System in Catfishes Suggests the Existence of a New, Endemic and Rare Species<\/strong><\/p>\n<p>Rocha-Reis D.A., de Oliveira Brand\u00e3o K., de Almeida-Toledo L.F., Pazza R., Kavalco K.F.<\/p>\n<p>The genus\u00a0<i>Hypostomus<\/i>\u00a0has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that\u00a0<i>Hypostomus<\/i><i>ancistroides<\/i>\u00a0represents a species complex in the Upper Paran\u00e1 River basin. In this paper, an unusual karyotype of an isolated\u00a0<i>H.<\/i>\u00a0aff.\u00a0<i>ancistroides<\/i>\u00a0population was investigated. All specimens of this sample have 2n = 66 chromosomes except for 1 male with 2n = 67, most likely due to a supernumerary chromosome. In this population, the sexes are dimorphic, the males are heterogametic, and an XX\/XY sex chromosome system is present. Phylogenetic analysis using mitochondrial and nuclear DNAs indicated that this population forms a monophyletic group separate from the other populations of\u00a0<i>H.<\/i><i>ancistroides<\/i>\u00a0and may represent an incipient species.<\/p>\n<p><em><strong>Cytogenetic and Genome Research<\/strong><\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1159\/000492959\">https:\/\/doi.org\/10.1159\/000492959<\/a>[:]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[:pb]Rocha-Reis D.A., de Oliveira Brand\u00e3o K., de Almeida-Toledo L.F., Pazza R., Kavalco K.F. The genus\u00a0Hypostomus\u00a0has a broad geographic distribution in Brazilian rivers and comprises armored catfishes with a very complicated taxonomy due to the absence of morphological autapomorphies. The existence of nearly 10 allopatric populations with different karyotypes suggests that\u00a0Hypostomusancistroides\u00a0represents a species complex in the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[39],"tags":[8,43,10,42,15,41,40],"class_list":["post-481","post","type-post","status-publish","format-standard","hentry","category-publicacoes","tag-cascudos","tag-chromosomes","tag-citogenetica","tag-cytogenetics","tag-filogeografia","tag-genetica-ecologica","tag-hypostomus"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/481","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=481"}],"version-history":[{"count":2,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/481\/revisions"}],"predecessor-version":[{"id":486,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/481\/revisions\/486"}],"wp:attachment":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}