Repeatability estimation for egg and chick production in meat-type chickens
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/4713 |
Resumo: | Repeatabilities were estimated for hatchability of fertile eggs (ECLOD), hatchability of all eggs set (NASC) and percentage of lay (POST). Data from three meat-type chicken populations were utilized in two experiments. Females were artificially inseminated, twice a week, with a pool semen of more than 20 males from their own populations. Average repeatability in the first and second experiments were all significant (P<0.01) and equal to 0.10±0.06 and 0.17±0.08 for ECLOD, 0.16±0.06 and 0.16±0.08 for NASC, 0.33±0.07 and 0.33±0.09 for POST, respectively. It was concluded that about 30 females was an appropriate number to obtain satisfactory estimates of repeatabilities for these traits. Repeatabilities were utilized as a superior limit of the heritabilities in establishing adequate numbers of measures that would give sound genetic responses when selecting females based on their own performances. The expected increase in genetic gain from selection, as a function of the number of hatches used for evaluating ECLOD, NASC and POST, was considerable as compared to the estimates obtained with only one measurement. About 103 days for measuring individual egg production was satisfactory for reaching a repeatability estimate of 0.40. For hatchability of all eggs set and hatchability of fertile eggs, at least 150 days would be necessary to attain 0.20 for ECLOD and 0.30 for NASC. |
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Repeatability estimation for egg and chick production in meat-type chickensObtenção de repetibilidades na produção de ovos e pintos de um dia em galinhas para corteheritability of reproductive character; hatchability of fertile eggs; hatchability of egg set; egg layherança de caracteres reprodutivos; eclodibilidade de ovos férteis; nascimento de pintos; postura de ovosRepeatabilities were estimated for hatchability of fertile eggs (ECLOD), hatchability of all eggs set (NASC) and percentage of lay (POST). Data from three meat-type chicken populations were utilized in two experiments. Females were artificially inseminated, twice a week, with a pool semen of more than 20 males from their own populations. Average repeatability in the first and second experiments were all significant (P<0.01) and equal to 0.10±0.06 and 0.17±0.08 for ECLOD, 0.16±0.06 and 0.16±0.08 for NASC, 0.33±0.07 and 0.33±0.09 for POST, respectively. It was concluded that about 30 females was an appropriate number to obtain satisfactory estimates of repeatabilities for these traits. Repeatabilities were utilized as a superior limit of the heritabilities in establishing adequate numbers of measures that would give sound genetic responses when selecting females based on their own performances. The expected increase in genetic gain from selection, as a function of the number of hatches used for evaluating ECLOD, NASC and POST, was considerable as compared to the estimates obtained with only one measurement. About 103 days for measuring individual egg production was satisfactory for reaching a repeatability estimate of 0.40. For hatchability of all eggs set and hatchability of fertile eggs, at least 150 days would be necessary to attain 0.20 for ECLOD and 0.30 for NASC.Esta pesquisa teve por objetivo o estudo da herança de caracteres reprodutivos em galinhas de corte. Três populações de galinhas de corte do Departamento de Genética da ESALQ/USP foram utilizadas em dois experimentos. Repetibilidades foram estimadas para eclodibilidade de ovos férteis (ECLOD), nascimento de pintos (NASC) e postura (POST). Em ambos os experimentos as fêmeas foram inseminadas com uma mistura de sêmen de mais de 20 galos de suas respectivas populações. As repetibilidades médias no primeiro e segundo experimentos foram 0,10±0,06 e 0,17±0,08 para ECLOD; 0,16±0,06 e 0,16±0,08 para NASC; 0,33±0,07 e 0,33±0,09 para POST. Concluiu-se que cerca de 30 galinhas foram apropriadas para a obtenção de boas estimativas de repetibilidade para esses caracteres. Os aumentos esperados nos ganhos genéticos pela seleção de ECLOD, NASC e POST, com base em médias de diversas incubações, foram consideráveis em relação a uma única observação. Cerca de 103 dias de controle da postura parecem satisfatórios para se atingir uma repetibilidade relativamente elevada (0,40). Com relação à incubabilidade de ovos férteis e de ovos incubados, pelo menos 150 dias de coleta de ovos seriam necessários para se atingir repetibilidades de 0,20 para ECLOD e 0,30 para NASC.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCustódio, Randolfo William Silvestre1997-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4713Pesquisa Agropecuaria Brasileira; v.32, n.8, ago. 1997; 765-771Pesquisa Agropecuária Brasileira; v.32, n.8, ago. 1997; 765-7711678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4713/7309info:eu-repo/semantics/openAccess2015-03-05T17:11:45Zoai:ojs.seer.sct.embrapa.br:article/4713Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2015-03-05T17:11:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Repeatability estimation for egg and chick production in meat-type chickens Obtenção de repetibilidades na produção de ovos e pintos de um dia em galinhas para corte |
title |
Repeatability estimation for egg and chick production in meat-type chickens |
spellingShingle |
Repeatability estimation for egg and chick production in meat-type chickens Custódio, Randolfo William Silvestre heritability of reproductive character; hatchability of fertile eggs; hatchability of egg set; egg lay herança de caracteres reprodutivos; eclodibilidade de ovos férteis; nascimento de pintos; postura de ovos |
title_short |
Repeatability estimation for egg and chick production in meat-type chickens |
title_full |
Repeatability estimation for egg and chick production in meat-type chickens |
title_fullStr |
Repeatability estimation for egg and chick production in meat-type chickens |
title_full_unstemmed |
Repeatability estimation for egg and chick production in meat-type chickens |
title_sort |
Repeatability estimation for egg and chick production in meat-type chickens |
author |
Custódio, Randolfo William Silvestre |
author_facet |
Custódio, Randolfo William Silvestre |
author_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Custódio, Randolfo William Silvestre |
dc.subject.por.fl_str_mv |
heritability of reproductive character; hatchability of fertile eggs; hatchability of egg set; egg lay herança de caracteres reprodutivos; eclodibilidade de ovos férteis; nascimento de pintos; postura de ovos |
topic |
heritability of reproductive character; hatchability of fertile eggs; hatchability of egg set; egg lay herança de caracteres reprodutivos; eclodibilidade de ovos férteis; nascimento de pintos; postura de ovos |
description |
Repeatabilities were estimated for hatchability of fertile eggs (ECLOD), hatchability of all eggs set (NASC) and percentage of lay (POST). Data from three meat-type chicken populations were utilized in two experiments. Females were artificially inseminated, twice a week, with a pool semen of more than 20 males from their own populations. Average repeatability in the first and second experiments were all significant (P<0.01) and equal to 0.10±0.06 and 0.17±0.08 for ECLOD, 0.16±0.06 and 0.16±0.08 for NASC, 0.33±0.07 and 0.33±0.09 for POST, respectively. It was concluded that about 30 females was an appropriate number to obtain satisfactory estimates of repeatabilities for these traits. Repeatabilities were utilized as a superior limit of the heritabilities in establishing adequate numbers of measures that would give sound genetic responses when selecting females based on their own performances. The expected increase in genetic gain from selection, as a function of the number of hatches used for evaluating ECLOD, NASC and POST, was considerable as compared to the estimates obtained with only one measurement. About 103 days for measuring individual egg production was satisfactory for reaching a repeatability estimate of 0.40. For hatchability of all eggs set and hatchability of fertile eggs, at least 150 days would be necessary to attain 0.20 for ECLOD and 0.30 for NASC. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-08-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/4713 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/4713 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/4713/7309 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.32, n.8, ago. 1997; 765-771 Pesquisa Agropecuária Brasileira; v.32, n.8, ago. 1997; 765-771 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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