Cytogenetical characterization of bovine breeds Caracu, Junqueira, Pantaneiro and Patua

Authors

  • Rita Maria Ladeira Pires Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Genética e Reprodução Animal, Nova Odessa, SP
  • Rafael Herrera Alvarez Agência Paulista de Tecnologia dos Agronegócios (APTA), Polo Centro Sul, Piracicaba, SP
  • Jackson Barros do Amaral Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Genética e Reprodução Animal, Nova Odessa, SP
  • Fábio Morato Monteiro Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro APTA Bovinos de Corte, Sertãozinho, SP
  • Alfredo José Ferreira de Melo Instituto de Terras do Estado de São Paulo, Presidente Venceslau, SP
  • Eduardo Trevisol Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP
  • Maria Aparecida Cassiano Lara Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Genética e Reprodução Animal, Nova Odessa, SP

DOI:

https://doi.org/10.17523/bia.v71n4p332

Keywords:

chromosomal abnormalities, karyotype, Y chromosome, natives breeds

Abstract

During the adaptive process to Brazilian conditions, the native cattle breeds acquired physiological and phenotypic characteristics wich differs them from European breeds, from which they derive. The objectives of present study were to compare the sex chromosomes morphologies between four Brazilian native cattle breeds as well as the incidence of chromosomal abnormalities. The karyotype of 332 animals from four breeds were analyzed: Caracu (115 females and 159 males), Junqueira (13 females and 3 males), Pantaneiro (8 males) and Patua (21 females and 13 males). The Giemsa coloring were used to read the chromosome. All cattle breeds studied showed the normal chromosome (2n=60) consisting of 58 acrocentric autosomes and two submetacentric X chromosomes in females, and one X and one Y in males. In Caracu breed, selected for dairy or beef, it was developed by animals dimorphism carriers of Y chromosome (acrocentric and submetacentric), and the beef bloodlines showed higher percentage of acrocentric Y chromosome. There was 1% significant difference in Chi-Square test. In two females and two male born from twin birth of Caracu breed it was observed chemerism 60, XX/ 60, XY, and in other female from same breed it was observed 60, XX/ 61 XXY. For other three breeds, no chromosomal abnormality was observed. The Y chromosome morphology of the Pantaneiro and Patua breeds showed dimorphism of Y chromosome (submetacentric an acrocentric). In the Junqueira breed, only submetacentric morphology was observed.

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Published

2014-04-22

Issue

Section

GENETIC

How to Cite

Cytogenetical characterization of bovine breeds Caracu, Junqueira, Pantaneiro and Patua. (2014). Bulletin of Animal Husbandry, 71(4), 332-340. https://doi.org/10.17523/bia.v71n4p332

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