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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: |
20/12/2022 |
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Data da última atualização: |
20/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
ST. LOUIS, T. J.; PEDROZA FILHO, M. X.; FLORES, R. M. V. |
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Afiliação: |
TRACY JEANEL ST. LOUIS, UNIVERSIDADE FEDERAL DO TOCANTINS; MANOEL XAVIER PEDROZA FILHO, CNPASA; ROBERTO MANOLIO VALLADAO FLORES, CNPASA. |
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Título: |
Understanding consumption frequency across consumer segments and regions in the Brazilian aquaculture market. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Aquaculture Economics & Management, 2022. |
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ISSN: |
1365-7305 |
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DOI: |
https://doi.org/10.1080/13657305.2022.2154869 |
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Idioma: |
Inglês |
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Conteúdo: |
Several socio-demographic factors influence fish consumption frequency and preferences in the Brazilian aquaculture market. Hence, the aims of this paper were (i) to acquire information on fish consumption frequency; (ii) to examine the associations between specific socio-demographic characteristics of aquaculture consumers; (iii) to investigate the consumption frequency of these specific characteristics relating to certain barriers and drivers of consumption frequency; and (iv) to explore whether consumption behavior varies across different groups of consumers and regions. The study involved an online survey of 1509 consumers across the five regions in Brazil. The results of this study indicated that the general fish consumption frequency pattern is highly seasonal. In addition, we determined that significant differences in fish consumption frequency, determinants, and habits were found among income levels, age groups and regions. Our results show that low-income consumers are highly disadvantaged and more likely to consume fish less frequently than the other income groups. We further recommend several marketing strategies and initiatives to stimulate the consumption frequency of fish amongst Brazilian consumers. |
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Thesagro: |
Aquicultura; Consumo Alimentar; Mercado. |
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Thesaurus NAL: |
Aquaculture; Consumers (people); Markets; Sociodemographic characteristics. |
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Categoria do assunto: |
D Governo, Leis e Regulamentações |
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Marc: |
LEADER 02018naa a2200253 a 4500
001 2150076
005 2022-12-20
008 2022 bl uuuu u00u1 u #d
022 $a1365-7305
024 7 $ahttps://doi.org/10.1080/13657305.2022.2154869$2DOI
100 1 $aST. LOUIS, T. J.
245 $aUnderstanding consumption frequency across consumer segments and regions in the Brazilian aquaculture market.$h[electronic resource]
260 $c2022
520 $aSeveral socio-demographic factors influence fish consumption frequency and preferences in the Brazilian aquaculture market. Hence, the aims of this paper were (i) to acquire information on fish consumption frequency; (ii) to examine the associations between specific socio-demographic characteristics of aquaculture consumers; (iii) to investigate the consumption frequency of these specific characteristics relating to certain barriers and drivers of consumption frequency; and (iv) to explore whether consumption behavior varies across different groups of consumers and regions. The study involved an online survey of 1509 consumers across the five regions in Brazil. The results of this study indicated that the general fish consumption frequency pattern is highly seasonal. In addition, we determined that significant differences in fish consumption frequency, determinants, and habits were found among income levels, age groups and regions. Our results show that low-income consumers are highly disadvantaged and more likely to consume fish less frequently than the other income groups. We further recommend several marketing strategies and initiatives to stimulate the consumption frequency of fish amongst Brazilian consumers.
650 $aAquaculture
650 $aConsumers (people)
650 $aMarkets
650 $aSociodemographic characteristics
650 $aAquicultura
650 $aConsumo Alimentar
650 $aMercado
700 1 $aPEDROZA FILHO, M. X.
700 1 $aFLORES, R. M. V.
773 $tAquaculture Economics & Management, 2022.
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Embrapa Pesca e Aquicultura (CNPASA) |
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