Triploidy in a sexually dimorphic passerine provides new evidence for the effect of the W chromosome on secondary sexual traits in birds

Autor(es)

de Camargo, Crisley ^[1] ; Lisle Gibbs, H. ^[2] ; Costa, Mariellen C. ^[3] ; Silveira, Luis F. ^[4] ; Rainho, Claudia A. ^[1] ; Ribolla, Paulo E. M. ^[5] ; Wasko, Adriane P. ^[1] ; Francisco, Mercival R. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias, Dept Genet, Botucatu, SP - Brazil

^[2] Ohio State Univ, Dept Evolut Ecol & Organismal Biol, Columbus, OH 43210 - USA

^[3] Univ Fed Sao Carlos, Programa Posgrad Ecol & Recursos Nat, Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Secao Aves, Museu Zool, Sao Paulo, SP - Brazil

^[5] Univ Estadual Paulista, Inst Biotecnol, Botucatu, SP - Brazil

^[6] Univ Fed Sao Carlos, Dept Ciencias Ambientais, Sorocaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF AVIAN BIOLOGY; v. 48, n. 11, p. 1475-1480, NOV 2017.
• Citações Web of Science: 1

Resumo

In birds, there are two main models for the determination of sex: the Z Dosage' model in which the number, or dose, of Z chromosomes determines sex, and the Dominant W' model which argues that a specific gene in the W chromosome may influence Z gene expression and determine sex. The best evidence for W determination of sex comes from birds with 2 copies of the Z chromosome paired with a single W (e.g. ZZW) which are nonetheless females. Here, we expand the species where such a mechanism may operate by reporting a case of a triploid Neotropical passerine bird with sexually dimorphic plumage, the SAo Paulo marsh antwren Formicivora paludicola. Evidence from 17 autosomal unlinked microsatellite loci, and CHD1 sex-linked locus, indicate that this individual is a 3n ZZW triploid with intermediate plumage pattern. This example expands our knowledge of sex determination mechanisms in birds by demonstrating that both the W and the two Z chromosomes affect the expression of morphological secondary sexual traits in a non-galliform bird. (AU)

• Processo FAPESP: 12/09105-7 - Análise populacional do bicudinho-do-brejo-paulista, Formicivora aff. acutirostris (Passeriformes: Thamnophilidae): uma espécie recém descoberta no Alto Tietê, São Paulo, Brasil
• Beneficiário: Crisley de Camargo
• Modalidade de apoio: Bolsas no Brasil - Mestrado