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Provedor de dados:  Genet. Mol. Biol.
País:  Brazil
Título:  Genetic diversity in a Brazilian bovine herd based on four microsatellite loci
Autores:  Almeida,Sabrina E. Matos
Machado,Márcia S.N.
Steigleder,Clara Sabina
Gama,Cleonice L.
Hutz,Mara Helena
Henkes,Luiz Ernani
Moraes,José Carlos F.
Weimer,Tania de Azevedo
Data:  2000-06-01
Ano:  2000
Resumo:  Microsatellites or short tandem repeats (STRs), DNA markers relatively abundant in the genome, have a high degree of polymorphism and therefore great potential for characterizing populations. The present study estimates genetic variability in a set of four microsatellites (BMS3013, BMS3004, HEL10 and TGLA122) in a Brazilian hybrid bovine breed (5/8 Aberdeen Angus x 3/8 Nelore). The objectives were to determine the effect of crossbreeding and selection in these animals' genetic diversity as well as to discover the herd's genetic relationship with that of other breeds. Low diversity was verified in BMS3013 and high diversity was detected in BMS3004, HEL10 and TGLA122. Two alleles in TGLA122 are described here for the first time (TGLA122*155 and TGLA122*163). These genes are possibly characteristics of Zebu animals since they have not been found in other taurine samples so far investigated. Low interpopulational diversity was observed among taurine cattle populations, and clusters obtained on TGLA122 phylogenetic trees agreed with the bovine herd's geographic origin. Therefore, despite TGLA122's high polymorphism and high levels of intrapopulational diversity, the system engenders consistent bovine phylogenies. We detected an intriguingly high similarity between Brangus Ibagé and Red Angus since the former is a hybrid having 3/8 of Nelore genes. Either these animals' environment or genetic selective practices applied to the breed probably favor the Angus genotype.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Genética
Relação:  10.1590/S1415-47572000000200018
Formato:  text/html
Fonte:  Genetics and Molecular Biology v.23 n.2 2000
Direitos:  info:eu-repo/semantics/openAccess

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