Avaliação do tamanho efetivo (Ne) como indicador de endogamia em caprinos

Abstract

Effective size is defined as the number of individuals of both sexes who are contributing genetically in a given population. This concept is fundamental because the number of animals of reproductive age in a population is generally greater than the number of animals that actually contribute genetically to the next generation. Knowledge of genetic and phenotypic parameters is critical to effective management of any animal breeding program. Genetic change analyzes in a herd are essential to evaluate the degree of efficiency in the selection process of the animals. The objective of this study was to evaluate the inbreeding indicator in goats, characterizing the production system adopted by the breeder and evaluate the breeding methods adopted by the same. The study was carried out with data referring to goats, belonging to the Cristal farm located in the municipality of Vargem Grande, where a semi-structured questionnaire was applied to the producer. In the data analysis it was observed that using the Effective Size (Ne) formula, the value found was 24.83. In view of this, it is concluded that there is loss of genetic diversity, since this value is below the minimum recommended by the FAO that is 50.