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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
24/10/2011 |
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Data da última atualização: |
19/02/2013 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
MUNIZ, F. L.; SILVEIRA, R. DA.; CAMPOS, Z.; MAGNUSSON, W. E.; HRBEK, T.; FARIAS, I. P. |
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Afiliação: |
FABIO L. MUNIZ, UNIVERSIDADE FEDERAL DO AMAZONAS; RONIS DA SILVEIRA, UNIVERSIDADE FEDERAL DO AMAZONAS; ZILCA MARIA DA SILVA CAMPOS, CPAP; WILLIAM E. MAGNUSSON, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; TOMAS HRBEK, UNIVERSIDADE FEDERAL DO AMAZONAS; IZENI P. FARIAS, UNIVERSIDADE FEDERAL DO AMAZONAS. |
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Título: |
Multiple paternity in the Black Caiman (Melanosuchus niger) population in the Anavilhanas National Park, Brazilian Amazonia. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Amphibia Reptilia, v.32, n.3, p. 428-434, aug., 2011. |
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Idioma: |
Português |
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Conteúdo: |
The formation of dominance hierarchies in which the female mates with a large dominant male is common among crocodilians. However, there is the possibility of polyandry, in which females mate with multiple partners during a single breeding season and generate offspring with multiple paternity. In the present study, eight pairs of heterologous primers developed for Alligator mississippiensis and Caiman latirostris were used to determine whether multiple paternity exists in the Black Caiman, Melanosuchus niger. For such, we analyzed 34 Black Caiman offspring from the Anavilhanas Archipelago in the Negro River (state of Amazonas, Brazil). The specimens came from six groups, each containing five or six hatchlings. Paternity exclusion and genetic identity indices were calculated to test the robustness of the microsatellite loci. Simple allele counts and maximum likelihood estimation of family clusters were used to determine the likelihood of occurrence of multiple paternity. Among the eight loci tested, five were effective at determining paternity, with paternity exclusion values close to 1.0 (QC = 0.92) and genetic identity values close to zero (IC < 0.01). Using the simple allele count, six cases of multiple paternity were detected and confirmed in three hatchling groups by four different microsatellite loci. However, maximum likelihood analysis indicated multiple paternity in all the groups analyzed, with five family clusters identified in one hatchling group alone. Considering that this species is listed according to IUCN as Lower Risk/Conservation Dependent, our results have direct conservation implications. Multiple paternity increases effective population size by maintaining genetic variation, and thus could be an important mechanism to maintain genetic diversity in isolated local populations. MenosThe formation of dominance hierarchies in which the female mates with a large dominant male is common among crocodilians. However, there is the possibility of polyandry, in which females mate with multiple partners during a single breeding season and generate offspring with multiple paternity. In the present study, eight pairs of heterologous primers developed for Alligator mississippiensis and Caiman latirostris were used to determine whether multiple paternity exists in the Black Caiman, Melanosuchus niger. For such, we analyzed 34 Black Caiman offspring from the Anavilhanas Archipelago in the Negro River (state of Amazonas, Brazil). The specimens came from six groups, each containing five or six hatchlings. Paternity exclusion and genetic identity indices were calculated to test the robustness of the microsatellite loci. Simple allele counts and maximum likelihood estimation of family clusters were used to determine the likelihood of occurrence of multiple paternity. Among the eight loci tested, five were effective at determining paternity, with paternity exclusion values close to 1.0 (QC = 0.92) and genetic identity values close to zero (IC < 0.01). Using the simple allele count, six cases of multiple paternity were detected and confirmed in three hatchling groups by four different microsatellite loci. However, maximum likelihood analysis indicated multiple paternity in all the groups analyzed, with five family clusters identified in one hatchling group alone. Considerin... Mostrar Tudo |
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Palavras-Chave: |
Microsatellites. |
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Thesaurus Nal: |
Alligatoridae; Melanosuchus niger. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02474naa a2200217 a 4500
001 1903858
005 2013-02-19
008 2011 bl --- 0-- u #d
100 1 $aMUNIZ, F. L.
245 $aMultiple paternity in the Black Caiman (Melanosuchus niger) population in the Anavilhanas National Park, Brazilian Amazonia.
260 $c2011
520 $aThe formation of dominance hierarchies in which the female mates with a large dominant male is common among crocodilians. However, there is the possibility of polyandry, in which females mate with multiple partners during a single breeding season and generate offspring with multiple paternity. In the present study, eight pairs of heterologous primers developed for Alligator mississippiensis and Caiman latirostris were used to determine whether multiple paternity exists in the Black Caiman, Melanosuchus niger. For such, we analyzed 34 Black Caiman offspring from the Anavilhanas Archipelago in the Negro River (state of Amazonas, Brazil). The specimens came from six groups, each containing five or six hatchlings. Paternity exclusion and genetic identity indices were calculated to test the robustness of the microsatellite loci. Simple allele counts and maximum likelihood estimation of family clusters were used to determine the likelihood of occurrence of multiple paternity. Among the eight loci tested, five were effective at determining paternity, with paternity exclusion values close to 1.0 (QC = 0.92) and genetic identity values close to zero (IC < 0.01). Using the simple allele count, six cases of multiple paternity were detected and confirmed in three hatchling groups by four different microsatellite loci. However, maximum likelihood analysis indicated multiple paternity in all the groups analyzed, with five family clusters identified in one hatchling group alone. Considering that this species is listed according to IUCN as Lower Risk/Conservation Dependent, our results have direct conservation implications. Multiple paternity increases effective population size by maintaining genetic variation, and thus could be an important mechanism to maintain genetic diversity in isolated local populations.
650 $aAlligatoridae
650 $aMelanosuchus niger
653 $aMicrosatellites
700 1 $aSILVEIRA, R. DA.
700 1 $aCAMPOS, Z.
700 1 $aMAGNUSSON, W. E.
700 1 $aHRBEK, T.
700 1 $aFARIAS, I. P.
773 $tAmphibia Reptilia$gv.32, n.3, p. 428-434, aug., 2011.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
01/03/2013 |
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Data da última atualização: |
03/03/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
IANELLA, P.; ARAUJO, R. O.; LACERDA, T. S.; MCMANUS, C. M.; CAETANO, A. R.; PAIVA, S. R. |
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Afiliação: |
PATRICIA IANELLA, DPD; RONYERE O. ARAUJO, UNB; THAISA S. LACERDA, UNB; CONCEPTA M. MCMANUS, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; ALEXANDRE RODRIGUES CAETANO, CENARGEN; SAMUEL REZENDE PAIVA, CENARGEN. |
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Título: |
SNP mining and linkage disequilibrium analysis in the PRNP gene of different brazilian sheep breeds. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
In: INTERNATIONAL PLANT & ANIMAL GENOME, 20., 2012, San Diego. Abstract... Jersey City: Scherago International, 2012. PO584. |
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Idioma: |
Inglês |
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Thesaurus NAL: |
sheep breeds. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00618nam a2200169 a 4500
001 1951884
005 2023-03-03
008 2012 bl uuuu u00u1 u #d
100 1 $aIANELLA, P.
245 $aSNP mining and linkage disequilibrium analysis in the PRNP gene of different brazilian sheep breeds.$h[electronic resource]
260 $aIn: INTERNATIONAL PLANT & ANIMAL GENOME, 20., 2012, San Diego. Abstract... Jersey City: Scherago International, 2012. PO584.$c2012
650 $asheep breeds
700 1 $aARAUJO, R. O.
700 1 $aLACERDA, T. S.
700 1 $aMCMANUS, C. M.
700 1 $aCAETANO, A. R.
700 1 $aPAIVA, S. R.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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