Quantitative traits in meat-type quail through two-trait analysis/ Caracteristicas quantitativas em matrizes de codorna de corte atraves de analises multicaracteristica
The aim of this paper to evaluate the productive and reproductive performance of different strains of meat-type quail hens, estimating the genetic parameters measured. Two groups were evaluated genetic and UFV2 UFV1 matrix quail cutting, with 1110 being the first animal and second with 1026. Multiva...
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Published in: | Ciência rural Vol. 42; no. 12; p. 2259 |
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Main Authors: | , , , , , , , , |
Format: | Journal Article |
Language: | Spanish |
Published: |
Universidade Federal de Santa Maria
01-12-2012
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Subjects: | |
Online Access: | Get full text |
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Summary: | The aim of this paper to evaluate the productive and reproductive performance of different strains of meat-type quail hens, estimating the genetic parameters measured. Two groups were evaluated genetic and UFV2 UFV1 matrix quail cutting, with 1110 being the first animal and second with 1026. Multivariate analysis were conducted using the methodology of principal components to define the most important variables. Then, two-trait analysis to estimate covariances and genetic correlations of traits. The characteristics of the analysis were: weight of the bird (P0, P7, P14, P21, P28, P35, P42, P77, P112 and P147), average egg weight (POM1, POM2, and POM3 POM4), average weight of the shell (PCM1, pcm2, and PCM3 PCM4), average weight of yolk (PGM1, PGM2, and PGM3 PGM4), weight of albumen (PAM1, PAM2, and PAM3 PAM4), average egg specific gravity (DM1, DM2, DM3 and DM4), average width of the egg (LOM1, LOM2, and LOM3 LOM4), average length of egg (COM1, COM2, COM3 and COM4), eggs (N1, N2, N3 and N4), total egg production (TXT) and age at first egg (IDPO). For the group of genetic UFV1, an increase in weight of birds may result in an early and that IDPO to select for increased body weight of birds does not result in significant losses in egg quality. As for UFV2, a selection made at 35 days can identify the most weight matrices throughout the production cycle, and do not generate large losses in total egg production. Key words: main components, Coturnix coturnix, genetic correlations. RESUMO Objetivou-se no presente trabalho avaliar o desempenho produtivo e reprodutivo de diferentes linhagens de codornas de corte, estimando os parametros geneticos das caracteristicas mensuradas. Avaliaram-se dois grupos geneticos UFV2 e UFV1 de matrizes de codorna de corte, sendo o primeiro com 1110 animais e o segundo com 1026. Foram realizadas analises multivariadas, utilizando a metodologia de componentes principais, para definir as variaveis de maior importancia. Em seguida, foram feitas analises bicaracteristicas para estimacao das covariancias e correlacoes geneticas, das caracteristicas selecionadas. As caracteristicas utilizadas na analise foram: peso da ave (P0, P7, P14, P21, P28, P35, P42, P77, P112 e P147), peso medio do ovo (POM1, POM2, POM3 e POM4), peso medio da casca (PCM1, PCM2, PCM3 e PCM4), peso medio da gema (PGM1, PGM2, PGM3 e PGM4), peso medio do albumen (PAM1, PAM2, PAM3 e PAM4), gravidade especifica media do ovo (DM1, DM2, DM3 e DM4), largura media do ovo (LOM1, LOM2, LOM3 e LOM4), comprimento medio do ovo (COM1, COM2, COM3 e COM4), numero de ovos (N1, N2, N3 e N4), taxa de postura total (TXT) e idade ao primeiro ovo (IDPO). Para o grupo genetico UFV1, um aumento do peso das codornas pode resultar em uma precocidade a IDPO e a selecao feita para aumento do peso corporal das codornas nao resulta em perdas significativas na qualidade dos ovos. Ja para UFV2, uma selecao feita aos 35 dias pode identificar as matrizes de maior peso ao longo do ciclo de producao, alem de nao gerar grandes perdas na taxa de postura total. Palavras-chave: componentes principais, Coturnix coturnix, correlacoes geneticas. |
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ISSN: | 0103-8478 |