Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil

ABSTRACT Genetic variation and population structure of the sea star Coscinasterias tenuispina were investigated using allozyme electrophoresis (seven polymorphic loci out of nine sampled) at seven sites on the coast of Rio de Janeiro State. Observed values of heterozygosity's were high (HOBS =...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Pazoto,Carmen, Ventura,Carlos, Duarte,Michelle, Silva,Edson
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2018
Materias:	Coscinasterias tenuispina echinoderms reproduction asexual gene flow heterozygosity allozyme electrophoresis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000200355
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-560X2018000200355
record_format	dspace
spelling	oai:scielo:S0718-560X20180002003552018-06-13Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, BrazilPazoto,CarmenVentura,CarlosDuarte,MichelleSilva,Edson Coscinasterias tenuispina echinoderms reproduction asexual gene flow heterozygosity allozyme electrophoresis ABSTRACT Genetic variation and population structure of the sea star Coscinasterias tenuispina were investigated using allozyme electrophoresis (seven polymorphic loci out of nine sampled) at seven sites on the coast of Rio de Janeiro State. Observed values of heterozygosity's were high (HOBS = 0.31 – 0.53), although similar to those found for others marine invertebrates. Departures from Hardy-Weinberg expectations were found only for one locus in three populations. No evidence of linkage disequilibrium was found among any loci for any population. The genetic identities vary from 0.882 to 0.988. The average θ was low and insignificant statistically (θ = 0.017). Furthermore, Bayesian analysis of population partitioning showed that the highest LnP(D) value was achieved for K = 1. These results do not corroborate any effect by upwelling limiting gene flow among the analyzed populations or the hypothesis that the strong sex ratio imbalance previously recorded to Itaipu population has been maintained by asexual reproduction.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.2 20182018-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000200355en10.3856/vol46-issue2-fulltext-11
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Coscinasterias tenuispina echinoderms reproduction asexual gene flow heterozygosity allozyme electrophoresis
spellingShingle	Coscinasterias tenuispina echinoderms reproduction asexual gene flow heterozygosity allozyme electrophoresis Pazoto,Carmen Ventura,Carlos Duarte,Michelle Silva,Edson Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
description	ABSTRACT Genetic variation and population structure of the sea star Coscinasterias tenuispina were investigated using allozyme electrophoresis (seven polymorphic loci out of nine sampled) at seven sites on the coast of Rio de Janeiro State. Observed values of heterozygosity's were high (HOBS = 0.31 – 0.53), although similar to those found for others marine invertebrates. Departures from Hardy-Weinberg expectations were found only for one locus in three populations. No evidence of linkage disequilibrium was found among any loci for any population. The genetic identities vary from 0.882 to 0.988. The average θ was low and insignificant statistically (θ = 0.017). Furthermore, Bayesian analysis of population partitioning showed that the highest LnP(D) value was achieved for K = 1. These results do not corroborate any effect by upwelling limiting gene flow among the analyzed populations or the hypothesis that the strong sex ratio imbalance previously recorded to Itaipu population has been maintained by asexual reproduction.
author	Pazoto,Carmen Ventura,Carlos Duarte,Michelle Silva,Edson
author_facet	Pazoto,Carmen Ventura,Carlos Duarte,Michelle Silva,Edson
author_sort	Pazoto,Carmen
title	Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
title_short	Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
title_full	Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
title_fullStr	Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
title_full_unstemmed	Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil
title_sort	genetic variation and population homogeneity of the sea star coscinasterias tenuispina (forcipulatida: asteroidea) on the coast of rio de janeiro, brazil
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000200355
work_keys_str_mv	AT pazotocarmen geneticvariationandpopulationhomogeneityoftheseastarcoscinasteriastenuispinaforcipulatidaasteroideaonthecoastofriodejaneirobrazil AT venturacarlos geneticvariationandpopulationhomogeneityoftheseastarcoscinasteriastenuispinaforcipulatidaasteroideaonthecoastofriodejaneirobrazil AT duartemichelle geneticvariationandpopulationhomogeneityoftheseastarcoscinasteriastenuispinaforcipulatidaasteroideaonthecoastofriodejaneirobrazil AT silvaedson geneticvariationandpopulationhomogeneityoftheseastarcoscinasteriastenuispinaforcipulatidaasteroideaonthecoastofriodejaneirobrazil
_version_	1714205199040512000

Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: Asteroidea) on the coast of Rio de Janeiro, Brazil

Ejemplares similares