Data/hora: 11/06/2024 04:08:53

Provedor de dados: | 96
País: | Brazil
Título: | Mapping quantitative trait loci in Gallus gallus using principal components
Autores: | Pinto,Luís Fernando Batista; Packer,Irineu Umberto; Ledur,Mônica Corrêa; Moura,Ana Silvia Alves Meira Tavares; Nones,Kátia; Coutinho,Luiz Lehmann.
Data: | 2010-11-01
Ano: | 2010
Palavras-chave: | Broilers; Canonical variables; Chickens; Genome.
Resumo: | This study aimed at mapping QTL (quantitative trait loci) using linear combinations of characteristics of economical interest in Gallus gallus. A total of 350 F2 chickens from an initial crossing among males from a broiler line (TT) with females from a layer line (CC) were used. It was conducted a QTL mapping in chromosomes of Gallus gallus (GGA1, GGA3, GGA5, GGA8, GGA11, and GGA13) for 20 performance and carcass traits. For detecting QTL, it was used the likelihood ratio test between a reduced model (including fixed effects of sex, hatch and random effect of infinitesimal genetic value) and a full model (including all the previous effects plus QTL effects). When original characterists were analyzed, that is, before the formation of linear combinations, six significant QTLs were mapped at 1% in the genome, four in the GGA1 (live weight at 35 days of age and at 42 days of age, abdominal fat and heart weight); and two on GGA3 (live weight at 35 and 42 days of age); three significant QTLs at 5% in the genome, one on GGA1 (head weight), one on GGA3 (wings weight), and one on GGA8 (gizzard weight); besides seven suggestive linkages for several traits. When QTLs were mapped for principal components, many mapped QTLs were confirmed for original traits, in addition to finding three QTLs and eight suggestive linkages not mapped for the original traits.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100016
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982010001100016
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.39 n.11 2010
Fonte: | info:eu-repo/semantics/openAccess