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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
03/02/2011 |
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Data da última atualização: |
24/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEIXOTO, M. G. C. D.; POGGIAN, C. F.; VERNEQUE, R. da S.; EGITO, A. A. do; CARVALHO, M. R. S.; PENNA, V. M.; BERGMANN, J. A. G.; VICCINI, L. F.; MACHADO, M. A. |
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Afiliação: |
MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; CECÍLIA FONSECA POGGIAN, UFJF; RUI DA SILVA VERNEQUE, CNPGL; ANDREA ALVES DO EGITO, CNPGC; MARIA RAQUEL SANTOS CARVALHO, UFMG; VÂNIA MALDINI PENNA, CBMG; JOSÉ AURÉLIO GARCIA BERGMANN, UFMG; LYDERSON FACIO VICCINI, UFJF; MARCO ANTONIO MACHADO, CNPGL. |
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Título: |
Genetic basis and inbreeding in the Brazilian Guzerat (Bos indicus) subpopulation selected for milk production. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Livestock Science, v. 131, n. 2/3, p. 168-174, 2010. |
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DOI: |
https://doi.org/10.1016/j.livsci.2010.03.015 |
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Idioma: |
Inglês |
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Conteúdo: |
The Guzerat breed is well adapted to the tropical conditions of Brazil. After 1940, the widespread use of Guzerat cattle for crossing has reduced its population size. In 1994, a selection program for milk production traits was initiated in some purebred herds. However, its success is compromised by genetic drift and an increased inbreeding coefficient (F). The objective of this study was to evaluate the genetic status of the Guzerat population under selection for milk production in order to monitor genetic variability. Genealogical data from 10,051 animals were used to estimate genetic parameters. The average F for all animals and for inbred animals in the pedigree was 0.009 and 0.025, respectively. Average relatedness was 0.011. The average generation interval was 7.48 years and the linear increase in F per generation was 0.0051. There was no trend of changes in the effective population size along generations, with the observation of an effective size of 98 in the last generation evaluated. The effective number of founders and ancestors was 318 and 101, respectively. Only 47 of 2106 ancestors contributed to 50% of the reference population. The bottleneck effect was 3.15. Average F and relatedness values are still low despite non-random mating. However, the reduced effective population size and effective number of ancestors indicate a risk of an increase in the inbreeding coefficient and genetic drift and consequent loss of variability. |
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Palavras-Chave: |
Effective population size; Genetic variability; Zebu cattle. |
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Thesaurus Nal: |
inbreeding coefficient. |
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Categoria do assunto: |
--
G Melhoramento Genético |
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Marc: |
LEADER 02347naa a2200277 a 4500
001 1881310
005 2023-03-24
008 2010 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.livsci.2010.03.015$2DOI
100 1 $aPEIXOTO, M. G. C. D.
245 $aGenetic basis and inbreeding in the Brazilian Guzerat (Bos indicus) subpopulation selected for milk production.$h[electronic resource]
260 $c2010
520 $aThe Guzerat breed is well adapted to the tropical conditions of Brazil. After 1940, the widespread use of Guzerat cattle for crossing has reduced its population size. In 1994, a selection program for milk production traits was initiated in some purebred herds. However, its success is compromised by genetic drift and an increased inbreeding coefficient (F). The objective of this study was to evaluate the genetic status of the Guzerat population under selection for milk production in order to monitor genetic variability. Genealogical data from 10,051 animals were used to estimate genetic parameters. The average F for all animals and for inbred animals in the pedigree was 0.009 and 0.025, respectively. Average relatedness was 0.011. The average generation interval was 7.48 years and the linear increase in F per generation was 0.0051. There was no trend of changes in the effective population size along generations, with the observation of an effective size of 98 in the last generation evaluated. The effective number of founders and ancestors was 318 and 101, respectively. Only 47 of 2106 ancestors contributed to 50% of the reference population. The bottleneck effect was 3.15. Average F and relatedness values are still low despite non-random mating. However, the reduced effective population size and effective number of ancestors indicate a risk of an increase in the inbreeding coefficient and genetic drift and consequent loss of variability.
650 $ainbreeding coefficient
653 $aEffective population size
653 $aGenetic variability
653 $aZebu cattle
700 1 $aPOGGIAN, C. F.
700 1 $aVERNEQUE, R. da S.
700 1 $aEGITO, A. A. do
700 1 $aCARVALHO, M. R. S.
700 1 $aPENNA, V. M.
700 1 $aBERGMANN, J. A. G.
700 1 $aVICCINI, L. F.
700 1 $aMACHADO, M. A.
773 $tLivestock Science$gv. 131, n. 2/3, p. 168-174, 2010.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pesca e Aquicultura. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
23/06/2020 |
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Data da última atualização: |
01/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
LIMA, A. F.; ALVES, R. R.; TORATI, L. S. |
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Afiliação: |
ADRIANA FERREIRA LIMA, CNPASA; ROSIANA RODRIGUES ALVES, CNPASA; LUCAS SIMON TORATI, CNPASA. |
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Título: |
Efficiency of color pattern as a method for sex identification in Arapaima gigas (Schinz, 1822). |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Pan-American Journal of Aquatic Sciences, v. 15, n. 2, p. 87-92, 2020. |
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ISSN: |
1809-9009 |
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Idioma: |
Inglês |
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Conteúdo: |
his study evaluated the utility of color pattern as a tool for sex identification inbroodstocks of Arapaima gigas. To do so, 110 individuals from three study sites had their sexdetermined with vitellogenin (VTG). Then, presence of red pigmentation was systematicallyevaluated scoring from the head (0) counting scales from the base of pectoral fin towards fishtail (1, 2, 3,...). Sex and study site were the variables that had significant effects on the zero-inflated negative binomial model (p<0.01) to assess color pattern. Discriminant functionanalysis (DFA) yielded 82 % of correct classification for females and 76 % for males. With suchmethod, both sexes could be identified with similar hit rates. Differences were seen in sexualcolor pattern comparing the different study sites. Therefore, application of the method should berestricted to site-specific broodstocks rather than be a general rule for all populations. Inconclusion, sex identification in Arapaima broodstocks through color pattern may be considereda cheap alternative for broodstock management but should be used in combination with otheravailable methods to yield optimal rates for sex identification (i.e. endoscopy, cannulationand/or vitellogenin). |
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Palavras-Chave: |
Dimorfismo sexual; Identificação sexual. |
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Thesagro: |
Identificação; Manejo; Peixe; Pigmentação; Pirarucu; Reprodutor. |
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Thesaurus NAL: |
Arapaima gigas; Fish; Sexual dimorphism. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02039naa a2200289 a 4500
001 2123419
005 2020-10-01
008 2020 bl uuuu u00u1 u #d
022 $a1809-9009
100 1 $aLIMA, A. F.
245 $aEfficiency of color pattern as a method for sex identification in Arapaima gigas (Schinz, 1822).$h[electronic resource]
260 $c2020
520 $ahis study evaluated the utility of color pattern as a tool for sex identification inbroodstocks of Arapaima gigas. To do so, 110 individuals from three study sites had their sexdetermined with vitellogenin (VTG). Then, presence of red pigmentation was systematicallyevaluated scoring from the head (0) counting scales from the base of pectoral fin towards fishtail (1, 2, 3,...). Sex and study site were the variables that had significant effects on the zero-inflated negative binomial model (p<0.01) to assess color pattern. Discriminant functionanalysis (DFA) yielded 82 % of correct classification for females and 76 % for males. With suchmethod, both sexes could be identified with similar hit rates. Differences were seen in sexualcolor pattern comparing the different study sites. Therefore, application of the method should berestricted to site-specific broodstocks rather than be a general rule for all populations. Inconclusion, sex identification in Arapaima broodstocks through color pattern may be considereda cheap alternative for broodstock management but should be used in combination with otheravailable methods to yield optimal rates for sex identification (i.e. endoscopy, cannulationand/or vitellogenin).
650 $aArapaima gigas
650 $aFish
650 $aSexual dimorphism
650 $aIdentificação
650 $aManejo
650 $aPeixe
650 $aPigmentação
650 $aPirarucu
650 $aReprodutor
653 $aDimorfismo sexual
653 $aIdentificação sexual
700 1 $aALVES, R. R.
700 1 $aTORATI, L. S.
773 $tPan-American Journal of Aquatic Sciences$gv. 15, n. 2, p. 87-92, 2020.
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Embrapa Pesca e Aquicultura (CNPASA) |
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