A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.

The evolution of the flower is commonly thought to have spurred angiosperm diversification. Similarly, particular floral traits might have promoted diversification within specific angiosperm clades. We hypothesize that traits promoting the precise positional transfer of pollen between flowers might...

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Autores principales:	Benjamin C Haller, Jurriaan M de Vos, Barbara Keller, Andrew P Hendry, Elena Conti
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ca8dc22485764ab792efbd3350c003c4
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spelling	oai:doaj.org-article:ca8dc22485764ab792efbd3350c003c42021-11-25T06:00:57ZA tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.1932-620310.1371/journal.pone.0106512https://doaj.org/article/ca8dc22485764ab792efbd3350c003c42014-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0106512https://doaj.org/toc/1932-6203The evolution of the flower is commonly thought to have spurred angiosperm diversification. Similarly, particular floral traits might have promoted diversification within specific angiosperm clades. We hypothesize that traits promoting the precise positional transfer of pollen between flowers might promote diversification. In particular, precise pollen transfer might produce partial reproductive isolation that facilitates adaptive divergence between parapatric populations differing in their reproductive-organ positions. We investigate this hypothesis with an individual-based model of pollen transfer dynamics associated with heterostyly, a floral syndrome that depends on precise pollen transfer. Our model shows that precise pollen transfer can cause sexual selection leading to divergence in reproductive-organ positions between populations served by different pollinators, pleiotropically causing an increase in reproductive isolation through a "magic trait" mechanism. Furthermore, this increased reproductive isolation facilitates adaptive divergence between the populations in an unlinked, ecologically selected trait. In a different pollination scenario, however, precise pollen transfer causes a decrease in adaptive divergence by promoting asymmetric gene flow. Our results highlight the idea that magic traits are not "magic" in isolation; in particular, the effect size of magic traits in speciation depends on the external environment, and also on other traits that modify the strength of the magic trait's influence on non-random mating. Overall, we show that the evolutionary consequences of pollen transfer dynamics can depend strongly on the available pollinator fauna and on the morphological fit between flowers and pollinators. Furthermore, our results illustrate the potential importance of even weak reproductive isolating barriers in facilitating adaptive divergence.Benjamin C HallerJurriaan M de VosBarbara KellerAndrew P HendryElena ContiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 9, p e106512 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Benjamin C Haller Jurriaan M de Vos Barbara Keller Andrew P Hendry Elena Conti A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
description	The evolution of the flower is commonly thought to have spurred angiosperm diversification. Similarly, particular floral traits might have promoted diversification within specific angiosperm clades. We hypothesize that traits promoting the precise positional transfer of pollen between flowers might promote diversification. In particular, precise pollen transfer might produce partial reproductive isolation that facilitates adaptive divergence between parapatric populations differing in their reproductive-organ positions. We investigate this hypothesis with an individual-based model of pollen transfer dynamics associated with heterostyly, a floral syndrome that depends on precise pollen transfer. Our model shows that precise pollen transfer can cause sexual selection leading to divergence in reproductive-organ positions between populations served by different pollinators, pleiotropically causing an increase in reproductive isolation through a "magic trait" mechanism. Furthermore, this increased reproductive isolation facilitates adaptive divergence between the populations in an unlinked, ecologically selected trait. In a different pollination scenario, however, precise pollen transfer causes a decrease in adaptive divergence by promoting asymmetric gene flow. Our results highlight the idea that magic traits are not "magic" in isolation; in particular, the effect size of magic traits in speciation depends on the external environment, and also on other traits that modify the strength of the magic trait's influence on non-random mating. Overall, we show that the evolutionary consequences of pollen transfer dynamics can depend strongly on the available pollinator fauna and on the morphological fit between flowers and pollinators. Furthermore, our results illustrate the potential importance of even weak reproductive isolating barriers in facilitating adaptive divergence.
format	article
author	Benjamin C Haller Jurriaan M de Vos Barbara Keller Andrew P Hendry Elena Conti
author_facet	Benjamin C Haller Jurriaan M de Vos Barbara Keller Andrew P Hendry Elena Conti
author_sort	Benjamin C Haller
title	A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
title_short	A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
title_full	A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
title_fullStr	A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
title_full_unstemmed	A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
title_sort	tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/ca8dc22485764ab792efbd3350c003c4
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A tale of two morphs: modeling pollen transfer, magic traits, and reproductive isolation in parapatry.

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