ABSTRACT The objective of this study was to assess the genetic structure and diversity of six Santa Inês sheep flocks from the Central-Northern Brazil. A panel of 20 highly polymorphic and informative microsatellite loci was selected and amplified. The following parameters were obtained: overall mean of number of alleles = 15.4; expected heterozygosity (He) = 0.89; polymorphism information content (PIC) = 0.88; discriminatory capacity = 0.95; combined probability of identity = 1.50 × 10−34; and probability of exclusion = 1.00. […]

The objective of this study was to characterize the genetic variability of Anglo-Nubian goats using microsatellite markers. The study was conducted using herds from four municipalities of Central-Northern Piauí (Teresina, José de Freitas, Campo Maior, and Angical), where technical information is scarce. Seven markers suggested by FAO were used (ILSTS11, McM527, INRA23, ETH10, OarfCB304, OarfCB48, and MAF209). The samples were genotyped using a 7% polyacrylamide gel. The average number of alleles per locus was 4.0, with observed and expected heterozygosity […]

O objetivo deste trabalho foi descrever a estrutura genética da raça Sindi no Brasil, utilizando dados do registro genealógico de animais nascidos entre 1955 e 1998. O banco de dados foi separado nos seguintes períodos: 1979-1983, 1984-1988, 1989-1993 e 1994-1998. A endogamia total aumentou de 0,38 para 10,13%; a esperada sob acasalamento ao acaso, de 0,07 para 5,65%; e a endogamia atribuída à subdivisão populacional, de 0,30 para 4,74%, considerando os períodos inicial e final, indicando a existência de subdivisão […]