TWO-WAY SELECTION FOR DAILY GAIN AND FEED CONVERSION IN A COMPOSITE RABBIT POPULATION
| Autor: | William R. Lamberson, D. W. Vogt, Ana Silvia Alves Meira Tavares Moura, Miroslav Kapš |
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| Přispěvatelé: | University of Missouri, University of Hawaii, Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Male
Litter (animal) Growth Weight Gain regression analysis Eating energy metabolism animal genetics Genetics education.field_of_study General Medicine Random effects model Phenotype female Regression Analysis Female Genetic Parameters Rabbits medicine.symptom phenotype Population rabbit Environment Biology Models Biological Feed conversion ratio Genetic correlation Animal science medicine Feed Conversion Animals Selection Genetic education Selection Selection (genetic algorithm) growth development and aging Models Genetic Rabbits. Selection Feed conversion Genetic parameters Heritability biological model Selection (Genetics) genetic selection physiology Animal Science and Zoology Energy Metabolism Weight gain Food Science |
| Zdroj: | ResearcherID Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:18:16Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:44:31Z : No. of bitstreams: 1 2-s2.0-0031228705.pdf: 225228 bytes, checksum: 9bd024de48f3845dab92881916e5e798 (MD5) Made available in DSpace on 2014-05-27T11:18:16Z (GMT). No. of bitstreams: 0 Previous issue date: 1997-09-01 We conducted a two-way selection experiment in a composite rabbit population to investigate the responses to selection for postweaning ADG and feed conversion (FC). Two generations of crossing, followed by four generations of random pair matings, preceded three generations of selection. Selection was practiced within four lines: high-feed conversion (HFC), low-feed conversion (LFC), high gain (HG), and low gain (LG). Data on 1,446 rabbits from the random mating and selection generations were fitted to an animal model to estimate heritabilities of and the genetic correlation between ADG and FC. The two-trait model included rabbit and common litter random effects and line, generation, and sex fixed effects. Estimates of heritability of ADG and FC were .48 and .29, respectively, and the genetic correlation between them was -.82. Common litter environmental effects accounted for a proportion of .11 and . 13 of the phenotypic variation of the two traits, respectively. For ADG (in g/d) the regressions of mean breeding values on generation number during the selection period were 1.23 ± .12 (P < .01) in the HG line and -.86 ± .12 (P < .01) in the LG line; the regressions for FC (in g feed/g gain) were -.07 ± .01 (P < .01) in the HFC line and .03 ± .01 (P < .05) in the LFC line. Selection for ADG was effective in improving ADG and FC. Department of Animal Sciences University of Missouri, Columbia, MO 65211 Animal Sciences Department University of Hawaii, Honolulu, HI 96822 Depto. de Prod. e Exploracao Animal FMVZ UNESP, Botucatu - SP 18618-000 Depto. de Prod. e Exploracao Animal FMVZ UNESP, Botucatu - SP 18618-000 |
| Databáze: | OpenAIRE |
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