sexual reproduction in freshwater fairy shrimp, dendrocephalus brasiliensis (pesta, 1921) inferred by amplified fragment length polymorphism markers reprodução sexual do microcrustáceo de água doce, dendrocephalus brasiliensis (pesta, 1921), deduzida a partir de marcadores de polimorfismo de comprimento de fragmento amplificado

Clicks: 213
ID: 253525
2013
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Abstract
Fluctuations in world harvests of Artemia sp cysts have increased prices sharply in the past years. Several organisms have been tested as alternative sources for a total or partial replacement of Artemia sp, among which the microcrustacean (Anostraca) Dendrocephalus brasiliensis stands out. The objective of this study was to investigate the reproductive strategy of D. brasiliensis by means of AFLP markers. The distinction between sexual and parthenogenetic reproduction was conducted using 7 EcoRI and MseI primer combinations in a full-sib family composed of 13 progenies. Forty polymorphic markers were obtained, of these, 35% were from paternal origin and 65% were maternally inherited. Results showed mendelian segregation in all markers through the chi-square at P≤0.05. Sex changes were observed after 72 hours of grouping individuals of the same sex in a container, suggesting a possible sex density-dependent behavior. Paternal inheritance revealed that this species adopts sexual reproduction under experimental conditions.
Há vários anos que a produção de cistos de Artemia sp. apresenta flutuações, o que aumenta consideravelmente o seu valor. Vários organismos têm sido testados para a substituição total ou parcial da Artemia, dentre os quais se destaca o microcrustáceo (Anostraca) Dendrocephalus brasiliensis. O objetivo do presente trabalho foi investigar a estratégia reprodutiva de D. brasiliensis por meio de marcadores de AFLP. A distinção entre uma reprodução sexuada e partenogenética foi feita a partir da genotipagem de sete combinações de primers de AFLP em uma família composta de 13 progênies. Quarenta marcadores polimórficos foram obtidos, dos quais 35% foram de origem paterna e 65%, materna. Os resultados mostraram a segregação mendeliana de todos os marcadores através do teste de qui-quadrado a P≤0.05. Mudanças de sexo foram observadas após 72 horas do agrupamento de indivíduos de mesmo sexo em um recipiente, sugerindo uma possível razão sexual populacional densidade-dependente. A herança paterna mostrou que a reprodução sexual é adotada por essa espécie sob condições experimentais.
Reference Key
silva2013cinciasexual Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Suzianny Maria Bezerra Cabral da Silva;Leilane Bruna Gomes dos Santos;José Patrocínio Lopes;Alfredo Olivera Gálvez;Maria Raquel Moura Coimbra
Journal Trials
Year 2013
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600021
Keywords
paternal inheritance aflp sexual reproductionagricultureagriculture (general)

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