Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex
Abstract.—Although polyploidy plays a fundamental role in plant evolution, the elucidation of polyploid origins is fraught with methodological challenges. For example, allopolyploid species may confound phylogenetic reconstruction because commonly used methods are designed to trace divergent, rather...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1031.5999 2023-05-15T15:10:16+02:00 Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex Alessia Guggisberg Guilhem Mansion Elena Conti The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1031.5999 http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1031.5999 http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf text ftciteseerx 2016-10-30T00:13:32Z Abstract.—Although polyploidy plays a fundamental role in plant evolution, the elucidation of polyploid origins is fraught with methodological challenges. For example, allopolyploid species may confound phylogenetic reconstruction because commonly used methods are designed to trace divergent, rather than reticulate patterns. Recently developed techniques of phylogenetic network estimation allow for a more effective identification of incongruence among trees. However, in-congruence can also be caused by incomplete lineage sorting, paralogy, concerted evolution, and recombination. Thus, initial hypotheses of hybridization need to be examined via additional sources of evidence, including the partitioning of infraspecific genetic polymorphisms, morphological characteristics, chromosome numbers, crossing experiments, and dis-tributional patterns. Primula sect. Aleuritia subsect. Aleuritia (Aleuritia) represents an ideal case study to examine reticulation because specific hypotheses have been derived from morphology, karyology, interfertility, and distribution to explain the observed variation of ploidy levels, ranging from diploidy to 14-ploidy. Sequences from 5 chloroplast and 1 nuclear riboso-mal DNA (nrDNA) markers were analyzed to generate the respective phylogenies and consensus networks. Furthermore, extensive cloning of the nrDNA marker allowed for the identification of shared nucleotides at polymorphic sites, inves-tigation of infraspecific genetic polymorphisms via principal coordinate analyses PCoAs, and detection of recombination between putative progenitor sequences. The results suggest that most surveyed polyploids originated via hybridization and that 2 taxonomic species formed recurrently from different progenitors, findings that are congruent with the expectations of Text Arctic Unknown Arctic |
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Abstract.—Although polyploidy plays a fundamental role in plant evolution, the elucidation of polyploid origins is fraught with methodological challenges. For example, allopolyploid species may confound phylogenetic reconstruction because commonly used methods are designed to trace divergent, rather than reticulate patterns. Recently developed techniques of phylogenetic network estimation allow for a more effective identification of incongruence among trees. However, in-congruence can also be caused by incomplete lineage sorting, paralogy, concerted evolution, and recombination. Thus, initial hypotheses of hybridization need to be examined via additional sources of evidence, including the partitioning of infraspecific genetic polymorphisms, morphological characteristics, chromosome numbers, crossing experiments, and dis-tributional patterns. Primula sect. Aleuritia subsect. Aleuritia (Aleuritia) represents an ideal case study to examine reticulation because specific hypotheses have been derived from morphology, karyology, interfertility, and distribution to explain the observed variation of ploidy levels, ranging from diploidy to 14-ploidy. Sequences from 5 chloroplast and 1 nuclear riboso-mal DNA (nrDNA) markers were analyzed to generate the respective phylogenies and consensus networks. Furthermore, extensive cloning of the nrDNA marker allowed for the identification of shared nucleotides at polymorphic sites, inves-tigation of infraspecific genetic polymorphisms via principal coordinate analyses PCoAs, and detection of recombination between putative progenitor sequences. The results suggest that most surveyed polyploids originated via hybridization and that 2 taxonomic species formed recurrently from different progenitors, findings that are congruent with the expectations of |
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The Pennsylvania State University CiteSeerX Archives |
format |
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Alessia Guggisberg Guilhem Mansion Elena Conti |
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Alessia Guggisberg Guilhem Mansion Elena Conti Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
author_facet |
Alessia Guggisberg Guilhem Mansion Elena Conti |
author_sort |
Alessia Guggisberg |
title |
Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
title_short |
Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
title_full |
Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
title_fullStr |
Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
title_full_unstemmed |
Copyright c © Society of Systematic Biologists DOI:10.1093/sysbio/syp010 Disentangling Reticulate Evolution in an Arctic–Alpine Polyploid Complex |
title_sort |
copyright c © society of systematic biologists doi:10.1093/sysbio/syp010 disentangling reticulate evolution in an arctic–alpine polyploid complex |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1031.5999 http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf |
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Arctic |
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Arctic |
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Arctic |
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Arctic |
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http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1031.5999 http://sysbio.oxfordjournals.org/content/early/2009/01/01/sysbio.syp010.full.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766341317232689152 |