Postzygotic isolation varies by ploidy level within a polyploid complex
Summary Whole genome duplication is considered to be a significant contributor to angiosperm speciation due to accumulation of rapid, strong interploid reproductive isolation. However, recent work suggests that interploid reproductive isolation may not be complete, especially among higher order cyto...
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Online Access: | http://dx.doi.org/10.1111/nph.14116 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.14116 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/am-pdf/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 |
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crwiley:10.1111/nph.14116 2024-09-15T18:00:53+00:00 Postzygotic isolation varies by ploidy level within a polyploid complex Sutherland, Brittany L. Galloway, Laura F. National Science Foundation Society for the Study of Evolution Botanical Society of America National Science Foundation Society for the Study of Evolution Torrey Botanical Society Botanical Society of America 2016 http://dx.doi.org/10.1111/nph.14116 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.14116 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/am-pdf/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor New Phytologist volume 213, issue 1, page 404-412 ISSN 0028-646X 1469-8137 journal-article 2016 crwiley https://doi.org/10.1111/nph.14116 2024-08-27T04:31:40Z Summary Whole genome duplication is considered to be a significant contributor to angiosperm speciation due to accumulation of rapid, strong interploid reproductive isolation. However, recent work suggests that interploid reproductive isolation may not be complete, especially among higher order cytotypes. This study evaluates postzygotic reproductive isolation among three cytotypes within a polyploid complex. We conducted reciprocal crosses using two diploid and two hexaploid populations each crossed to tetraploid populations spanning the geographic and phylogenetic range of the Campanula rotundifolia polyploid complex. Interploid and intrapopulation crosses were scored for fruit set, seed number, germination proportion and pollen viability. Postzygotic isolation was calculated for each cross as the product of these fitness components. A subset of offspring was cytotyped via flow cytometry. Postzygotic isolation was significantly lower in tetraploid–hexaploid crosses than diploid–tetraploid crosses, mostly due to substantially higher germination among tetraploid–hexaploid crosses. Tetraploid–hexaploid crosses produced pentaploids exclusively, whereas diploid–tetraploid crosses produced both triploids and tetraploids in high frequencies. Postzygotic isolation was weaker among higher order polyploids than between diploids and tetraploids, and unreduced gametes may facilitate diploid–tetraploid reproduction. This incomplete postzygotic isolation could allow ongoing interploid gene flow, especially among higher order polyploids, which may slow divergence and speciation in polyploid complexes. Article in Journal/Newspaper Campanula rotundifolia Wiley Online Library New Phytologist 213 1 404 412 |
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Wiley Online Library |
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English |
description |
Summary Whole genome duplication is considered to be a significant contributor to angiosperm speciation due to accumulation of rapid, strong interploid reproductive isolation. However, recent work suggests that interploid reproductive isolation may not be complete, especially among higher order cytotypes. This study evaluates postzygotic reproductive isolation among three cytotypes within a polyploid complex. We conducted reciprocal crosses using two diploid and two hexaploid populations each crossed to tetraploid populations spanning the geographic and phylogenetic range of the Campanula rotundifolia polyploid complex. Interploid and intrapopulation crosses were scored for fruit set, seed number, germination proportion and pollen viability. Postzygotic isolation was calculated for each cross as the product of these fitness components. A subset of offspring was cytotyped via flow cytometry. Postzygotic isolation was significantly lower in tetraploid–hexaploid crosses than diploid–tetraploid crosses, mostly due to substantially higher germination among tetraploid–hexaploid crosses. Tetraploid–hexaploid crosses produced pentaploids exclusively, whereas diploid–tetraploid crosses produced both triploids and tetraploids in high frequencies. Postzygotic isolation was weaker among higher order polyploids than between diploids and tetraploids, and unreduced gametes may facilitate diploid–tetraploid reproduction. This incomplete postzygotic isolation could allow ongoing interploid gene flow, especially among higher order polyploids, which may slow divergence and speciation in polyploid complexes. |
author2 |
National Science Foundation Society for the Study of Evolution Botanical Society of America National Science Foundation Society for the Study of Evolution Torrey Botanical Society Botanical Society of America |
format |
Article in Journal/Newspaper |
author |
Sutherland, Brittany L. Galloway, Laura F. |
spellingShingle |
Sutherland, Brittany L. Galloway, Laura F. Postzygotic isolation varies by ploidy level within a polyploid complex |
author_facet |
Sutherland, Brittany L. Galloway, Laura F. |
author_sort |
Sutherland, Brittany L. |
title |
Postzygotic isolation varies by ploidy level within a polyploid complex |
title_short |
Postzygotic isolation varies by ploidy level within a polyploid complex |
title_full |
Postzygotic isolation varies by ploidy level within a polyploid complex |
title_fullStr |
Postzygotic isolation varies by ploidy level within a polyploid complex |
title_full_unstemmed |
Postzygotic isolation varies by ploidy level within a polyploid complex |
title_sort |
postzygotic isolation varies by ploidy level within a polyploid complex |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/nph.14116 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.14116 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/am-pdf/10.1111/nph.14116 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14116 |
genre |
Campanula rotundifolia |
genre_facet |
Campanula rotundifolia |
op_source |
New Phytologist volume 213, issue 1, page 404-412 ISSN 0028-646X 1469-8137 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/nph.14116 |
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New Phytologist |
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213 |
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1 |
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404 |
op_container_end_page |
412 |
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1810438083673325568 |