Desempenho produtivo e reprodutivo de grupos genéticos da raça girolando

• Ano de defesa: 2014
• Autor(a) principal: Leite, Marcello Barros
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; Brasil; Programa de Pós-graduação em Ciências Veterinárias
• Palavras-chave em Português: Veterinária; Evolução (Biologia); Genética; Heterose; Reprodução animal; Evolução genética; Produção; Reprodução; Período do ano; Genetic evolution; Heterosis; Production; Reproduction; Period of the year; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/17987; https://doi.org/10.14393/ufu.di.2014.438

Were obtained with the Associação Brasileira dos Criadores de Girolando, 27354 data for production and reproduction between the years 1974 to 2012. For comparison to age at first calving (IPP), age at second calving (ISP), production at first calving (LAC1), age at the first calving (IPP), calving intervals (IEP), age at the second calving (ISP), producing on the second calving (LAC2); between genetic groups (GG) 1/2 (1/2 Holstein + 1/2 Gir), 3/8 (3/8 Holstein + 5/8 Gir) 3/4 (3/4 Holstein + 1/4 Gir), 5/8 (5/8 Holstein + 3/8 Gir), 7/8 (7/8 de Holstein + 1/8 Gir) e 1/4 (1/4 Holstein + 3/4 de Gir) and season of year autumn/winter or spring/summer (PA). To study the genetic evolution of Girolando cattle, the original data was held and reviews LAC1, IPP, ISP and IEP from the data 1974 to 2010. All data were analyze using the general linear model (GLM) procedure. The results showed interaction of the productive performance between season and different blood degrees. Showing worst production to blood levels of high percentage of blood Zebu in LAC1: 1/4, 3382,95 (autumn/winter), 3373,31 (spring/summer); 3/8, 4223,25 (autumn/winter), 3882,40 (spring/summer) and LAC2: 1/4, 3367,01 (autumn/winter), 3204,83 (spring/summer); 3/8, 3979,30 (autumn/winter), 3848,61 (spring/summer) and better for the animals with the highest percentage of Holstein blood in LAC1: 3/4, 5064,02 (autumn/winter), 4882,33 (spring/summer); 7/8, 5538,23 (autumn/winter), 5472,81 (spring/summer), in LAC2: 3/4, 4836,96 (autumn/winter), 4528,06 (spring/summer); 7/8, 5397,14 (autumn/winter), 4991,43 (spring/summer). The data also demonstrate a significant gain in production for 1/2 genetic group in LAC1: 4673,74 (autumn/winter), 4364,33 (spring/summer) and lac2: 4494,14 (autumn/winter), 4094,20 (spring/summer), probably due to genetic gain stemmed from heterosis. Analyzing the periods1980 to 2010, there was a gain in production and reproduction of Girolando cattle: in period 2 (1980-1989) in LAC1 3151,96 and IEP 616,02 and in period 4 (2000-2010) LAC1 at 4899,91 and IEP 482,38.