Índice de seleção utilizando dados simulados de tilápias do Nilo

• Ano de defesa: 2006
• Autor(a) principal: Aguiar, Humberto Neves de
• Orientador(a): Euclydes, Ricardo Frederico
• Banca de defesa: Lopes, Paulo Sávio , Carneiro, Antônio Policarpo Souza
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Tilápia; Genética; Melhoramento genético; Genesys
• Palavras-chave em Inglês: Tilapia; Genetics; Breeding; Genesys
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::GENETICA E MELHORAMENTO DOS ANIMAIS DOMESTICOS
• Link de acesso: http://locus.ufv.br/handle/123456789/5723

This thesis intends to demonstrate the existence of significant differences on the selection index when calculated at each generation and for both sex separately. For this purpose, the indexes were calculated using simulated data of heights and weights of sexually developed Nile tilapias. The simulation was made with two heritabilities for each characteristic (0,2 and 0,4 for weight and 0,3 and 0,5 for height) and with different pleiotropic effects (30, 50, 70%). A base population of 500 males and 500 females was simulated with a positive correlation between the characteristics. The female s potential was limited as 80% of the male s potential, for both characteristics. The initial population of 10 males and 100 females was random selected from base population. Ten fry, sex balanced, were random selected from each female. The simulation was made for 10 generations, 10 times for each generation. The first selection index was calculated with sex separation considering weight and height (b1 and b2 for males and b1 and b2 for females). A second index was established, using the same parameters, but sex was included in calculations. Different weights were used for each of the analyzed characteristics. These weights were stipulated considering the interest of each characteristic.