Consulta: creatorFacets:"Barbosa,Ana Carla Borges"
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Data/hora: 16/06/2024 09:00:02

Population structure of Nellore cattle in northeastern Brazil
Provedor de dados: 96
Autores: Barbosa,Ana Carla Borges; Malhado,Carlos Henrique Mendes; Carneiro,Paulo Luiz Souza; Muniz,Lorena Mirelle Santos; Ambrosini,Diego Pagung; Carrillo,José Adrián; Martins-Filho,Raimundo.
The objective of this study was to evaluate the population genetic structure of Nellore cattle in northeastern Brazil. Pedigree information was collected from 175,231 animals born from 1967 to 2007. Probability of gene origin, inbreeding, average relatedness coefficient (AR), completeness pedigree, effective population size and generation interval were calculated. Generation interval was high due to the long period of time animals were used as reproducers. The bottleneck effect was evidenced as a result of intensive use of limited breeders over the last years. Low values were observed ​​in the effective number of founder animals (434) and ancestors (427) comparing with the number on the base (175,231) and reference populations (130,038). Generally, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effective size; Generation intervals; Inbreeding; Pedigree.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900005

Principal components for the in vivo and carcass conformations of Anglo-Nubian crossbred goats
Provedor de dados: 65
Autores: Ribeiro,Marta Jeidjane Borges; Pinto,Luís Fernando Batista; Barbosa,Ana Carla Borges; Santos,Gladston Rafael de Arruda; Pinto,Ana Paula Gomes; Nascimento,Carlos Souza do; Barbosa,Leandro Teixeira.
ABSTRACT: This study aimed to identify the principal components (PC) that explain the highest percentages of total variance and best characterize the in vivo and carcass morphologies of Anglo-Nubian crossbred goats. Nineteen carcass morphometric traits and six in vivo morphometric traits were measured in 28 kids at eight months of age. Principal component analysis indicated that five PC were able to explain 83.57% of the total variance in the 19 original carcass traits. Those components were termed PC1-Carcass Size, PC2 - Body Condition, PC3-Carcass Width, PC4-Chest Depth, and PC5 - Hindquarter. For in vivo morphometric traits, the first two principal components explained 78.86% of the total variance. These components were called PC1-In vivo Size and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Correlation; Multivariate analysis; Variance.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600653