Berganês, a new sheepbreed from the Brazilian semiarid: performance and carcass traits in different sex-classes by univariate and multivariate approaches

Silva Filho, José Renaldo Vilar daMoura Neto, João Bandeira deChagas, Ellio Celestino de OiveiraSantos, Lays Thayse Alves dosSouza, José Ilson Rodrigues deQueiroz, Mário Adriano ÁvilaRodrigues, Rafael Torres de SouzaVoltolini, Tadeu Vinhas

Twenty-four lambs between four and five months of age were divided into sex classes: uncastrated males, castrated males and females, eight for each treatment, with an average body weight of 27.00 ± 3.13 kg. dry matter and water intakes were higher for uncastrated males (p < 0.001). final body weight, body weight at slaughter, average daily gain and cold carcass weight were greater for uncastrated, intermediate for castrated and lower for females (p < 0.05).hot and cold carcass yields were higher for castrated males and females, respectively. (p < 0.05).based on principal component analysis, twenty-five variables were selected out ofthirty-two, in some of the seven principal components generated, summarizing 21.87% data dimension. Discriminant analysis identified greater discrimination power for body weight at slaughter, thorax width, thorax depth, fatness, dry matter intake and hot carcass weight.All lambs were classified into their respective sex classes. Therefore, uncastrated males have performed betterthan castrated ones and both showedhigher performance than females.Females and castrated males showedhigher carcass yield.Discriminant analysis indicated heterogeneity between sex classes.(AU)

1. sheepbreeding
2. native sheep
3. multivariate analysis
4. commercial cuts
5. cooling loss