Patterns of genetic diversity of local pig populations in the State of Pernambuco, Brazil

Revista Brasileira de Zootecnia

Gomes Filho, Manoel Adrião¹  Ferreira, Débora Nathália de Moura¹  Caetano, Alexandre Rodrigues²  Paiva, Samuel Rezende²  Silva, Elizabete Cristina da¹  Ianella, Patrícia²  Oliveira, Cláudio José Parro de¹  Dutra Junior, Wilson Moreira¹ 

[1] Universidade Federal Rural de Pernambuco;Embrapa Recursos Genéticos e Biotecnologia, Brasília, Brazil

关键词: animal genetics resources;    genetic variability;    microsatellites loci;    Sus Scrofa    Introduction A great portion of the Brazilian swine herd is composed of breeds with high genetic potential for meat production (Duroc;    Landrace;    Large White;    Hampshire and Pietrain);    which were intensively introduced in the country during the 60's;    and commercial or specialized breeds (mostly composed by crossbreeding) that were more recently introduced;   

DOI  :  10.1590/S1516-35982011000800010

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

This study estimated the genetic diversity and structure of 12 genetic groups (GG) of locally adapted and specialized pigs in the state of Pernambuco using 22 microsatellite markers. Nine locally adapted breeds (Baé, Caruncho, Canastra, Canastrão, Mamelado, Moura, Nilo, Piau and UDB (Undefined Breed)) and 3 specialized breeds (Duroc, Landrace and Large White), totaling 190 animals, were analyzed. The Analysis of Molecular Variance (AMOVA) showed that 3.2% of the total variation was due to differences between genetic groups, and 3.6% to differences between local and commercial pigs. One hundred and ninety eight alleles were identified and apart from the Large White breed, all GG presented Hardy-Weinberg Equilibrium deviations for some loci. The total and effective allele means were lower for Duroc (3.65 and 3.01) and higher for UDB (8.89 and 4.53) and Canastra (8.61 and 4.58). Using Nei's standard genetic distance and the UPGMA method, it was possible to observe that the Landrace breed was grouped with the local genetic groups Canastra, Moura, Canastrão, Baé and Caruncho. Due to the complex admixture pattern, the genetic variability of the 12 genetic groups can be analyzed by distributing the individuals into two populations as demonstrated by a Bayesian analysis, corroborating the results from AMOVA, which revealed a low level of genetic differentiation between the inferred populations.

【 授权许可】

CC BY-NC