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

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