Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae)
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Genetics and Molecular Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600016 |
Resumo: | The utility of microsatellites (SSRs) in reconstructing phylogenies is largely confined to studies below the genus level, due to the potential of homoplasy resulting from allele size range constraints and poor SSR transferability among divergent taxa. The eucalypt genus Corymbia has been shown to be monophyletic using morphological characters, however, analyses of intergenic spacer sequences have resulted in contradictory hypotheses- showing the genus as either equivocal or paraphyletic. To assess SSR utility in higher order phylogeny in the family Myrtaceae, phylogenetic relationships of the bloodwood eucalypts Corymbia and related genera were investigated using eight polymorphic SSRs. Repeat size variation using the average square and Nei's distance were congruent and showed Corymbia to be a monophyletic group, supporting morphological characters and a recent combination of the internal and external transcribed spacers dataset. SSRs are selectively neutral and provide data at multiple genomic regions, thus may explain why SSRs retained informative phylogenetic signals despite deep divergences. We show that where the problems of size-range constraints, high mutation rates and size homoplasy are addressed, SSRs might resolve problematic phylogenies of taxa that have diverged for as long as three million generations or 30 million years. |
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Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae)microsatellite phylogenyparaphyletichomoplasyincongruenceeucalyptsThe utility of microsatellites (SSRs) in reconstructing phylogenies is largely confined to studies below the genus level, due to the potential of homoplasy resulting from allele size range constraints and poor SSR transferability among divergent taxa. The eucalypt genus Corymbia has been shown to be monophyletic using morphological characters, however, analyses of intergenic spacer sequences have resulted in contradictory hypotheses- showing the genus as either equivocal or paraphyletic. To assess SSR utility in higher order phylogeny in the family Myrtaceae, phylogenetic relationships of the bloodwood eucalypts Corymbia and related genera were investigated using eight polymorphic SSRs. Repeat size variation using the average square and Nei's distance were congruent and showed Corymbia to be a monophyletic group, supporting morphological characters and a recent combination of the internal and external transcribed spacers dataset. SSRs are selectively neutral and provide data at multiple genomic regions, thus may explain why SSRs retained informative phylogenetic signals despite deep divergences. We show that where the problems of size-range constraints, high mutation rates and size homoplasy are addressed, SSRs might resolve problematic phylogenies of taxa that have diverged for as long as three million generations or 30 million years.Sociedade Brasileira de Genética2007-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600016Genetics and Molecular Biology v.30 n.4 2007reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572007000600016info:eu-repo/semantics/openAccessOchieng,Joel W.Steane,Dorothy A.Ladiges,Pauline Y.Baverstock,Peter R.Henry,Robert J.Shepherd,Mervyneng2007-12-13T00:00:00Zoai:scielo:S1415-47572007000600016Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2007-12-13T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false |
dc.title.none.fl_str_mv |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
title |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
spellingShingle |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) Ochieng,Joel W. microsatellite phylogeny paraphyletic homoplasy incongruence eucalypts |
title_short |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
title_full |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
title_fullStr |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
title_full_unstemmed |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
title_sort |
Microsatellites retain phylogenetic signals across genera in eucalypts (Myrtaceae) |
author |
Ochieng,Joel W. |
author_facet |
Ochieng,Joel W. Steane,Dorothy A. Ladiges,Pauline Y. Baverstock,Peter R. Henry,Robert J. Shepherd,Mervyn |
author_role |
author |
author2 |
Steane,Dorothy A. Ladiges,Pauline Y. Baverstock,Peter R. Henry,Robert J. Shepherd,Mervyn |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Ochieng,Joel W. Steane,Dorothy A. Ladiges,Pauline Y. Baverstock,Peter R. Henry,Robert J. Shepherd,Mervyn |
dc.subject.por.fl_str_mv |
microsatellite phylogeny paraphyletic homoplasy incongruence eucalypts |
topic |
microsatellite phylogeny paraphyletic homoplasy incongruence eucalypts |
description |
The utility of microsatellites (SSRs) in reconstructing phylogenies is largely confined to studies below the genus level, due to the potential of homoplasy resulting from allele size range constraints and poor SSR transferability among divergent taxa. The eucalypt genus Corymbia has been shown to be monophyletic using morphological characters, however, analyses of intergenic spacer sequences have resulted in contradictory hypotheses- showing the genus as either equivocal or paraphyletic. To assess SSR utility in higher order phylogeny in the family Myrtaceae, phylogenetic relationships of the bloodwood eucalypts Corymbia and related genera were investigated using eight polymorphic SSRs. Repeat size variation using the average square and Nei's distance were congruent and showed Corymbia to be a monophyletic group, supporting morphological characters and a recent combination of the internal and external transcribed spacers dataset. SSRs are selectively neutral and provide data at multiple genomic regions, thus may explain why SSRs retained informative phylogenetic signals despite deep divergences. We show that where the problems of size-range constraints, high mutation rates and size homoplasy are addressed, SSRs might resolve problematic phylogenies of taxa that have diverged for as long as three million generations or 30 million years. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600016 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600016 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1415-47572007000600016 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
dc.source.none.fl_str_mv |
Genetics and Molecular Biology v.30 n.4 2007 reponame:Genetics and Molecular Biology instname:Sociedade Brasileira de Genética (SBG) instacron:SBG |
instname_str |
Sociedade Brasileira de Genética (SBG) |
instacron_str |
SBG |
institution |
SBG |
reponame_str |
Genetics and Molecular Biology |
collection |
Genetics and Molecular Biology |
repository.name.fl_str_mv |
Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG) |
repository.mail.fl_str_mv |
||editor@gmb.org.br |
_version_ |
1752122381029081088 |