Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex

Abstract Host specialization after host shifting is traditionally viewed as the pathway to speciation in parasitic plants. However, geographical and environmental changes can also influence parasite speciation, through hybridization processes. Here we investigated the impact of past climatic fluctua...

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Autores principales:	Fernanda Baena-Díaz, Santiago Ramírez-Barahona, Juan Francisco Ornelas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0abab67a6ddf4e3aa068f410bf662d5e
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spelling	oai:doaj.org-article:0abab67a6ddf4e3aa068f410bf662d5e2021-12-02T15:08:17ZHybridization and differential introgression associated with environmental shifts in a mistletoe species complex10.1038/s41598-018-23707-62045-2322https://doaj.org/article/0abab67a6ddf4e3aa068f410bf662d5e2018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-23707-6https://doaj.org/toc/2045-2322Abstract Host specialization after host shifting is traditionally viewed as the pathway to speciation in parasitic plants. However, geographical and environmental changes can also influence parasite speciation, through hybridization processes. Here we investigated the impact of past climatic fluctuations, environment, and host shifts on the genetic structure and patterns of hybridization and gene flow between Psittacanthus calyculatus and P. schiedeanus, a Mesoamerican species complex. Using microsatellites (408 individuals), we document moderate genetic diversity but high genetic differentiation between widespread parental clusters, calyculatus in dry pine-oak forests and schiedeanus in cloud forests. Bayesian analyses identified a third cluster, with admixture between parental clusters in areas of xeric and tropical dry forests and high levels of migration rates following secondary contact. Coincidently host associations in these areas differ from those in areas of parental species, suggesting that past hybridization played a role in environmental and host shifts. Overall, the observed genetic and geographic patterns suggest that these Psittacanthus populations could have entered a distinct evolutionary pathway. The results provide evidence for highlights on the importance of the Pleistocene climate changes, habitat differences, and potential host shifts in the evolutionary history of Neotropical mistletoes.Fernanda Baena-DíazSantiago Ramírez-BarahonaJuan Francisco OrnelasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-14 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fernanda Baena-Díaz Santiago Ramírez-Barahona Juan Francisco Ornelas Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
description	Abstract Host specialization after host shifting is traditionally viewed as the pathway to speciation in parasitic plants. However, geographical and environmental changes can also influence parasite speciation, through hybridization processes. Here we investigated the impact of past climatic fluctuations, environment, and host shifts on the genetic structure and patterns of hybridization and gene flow between Psittacanthus calyculatus and P. schiedeanus, a Mesoamerican species complex. Using microsatellites (408 individuals), we document moderate genetic diversity but high genetic differentiation between widespread parental clusters, calyculatus in dry pine-oak forests and schiedeanus in cloud forests. Bayesian analyses identified a third cluster, with admixture between parental clusters in areas of xeric and tropical dry forests and high levels of migration rates following secondary contact. Coincidently host associations in these areas differ from those in areas of parental species, suggesting that past hybridization played a role in environmental and host shifts. Overall, the observed genetic and geographic patterns suggest that these Psittacanthus populations could have entered a distinct evolutionary pathway. The results provide evidence for highlights on the importance of the Pleistocene climate changes, habitat differences, and potential host shifts in the evolutionary history of Neotropical mistletoes.
format	article
author	Fernanda Baena-Díaz Santiago Ramírez-Barahona Juan Francisco Ornelas
author_facet	Fernanda Baena-Díaz Santiago Ramírez-Barahona Juan Francisco Ornelas
author_sort	Fernanda Baena-Díaz
title	Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
title_short	Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
title_full	Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
title_fullStr	Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
title_full_unstemmed	Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
title_sort	hybridization and differential introgression associated with environmental shifts in a mistletoe species complex
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/0abab67a6ddf4e3aa068f410bf662d5e
work_keys_str_mv	AT fernandabaenadiaz hybridizationanddifferentialintrogressionassociatedwithenvironmentalshiftsinamistletoespeciescomplex AT santiagoramirezbarahona hybridizationanddifferentialintrogressionassociatedwithenvironmentalshiftsinamistletoespeciescomplex AT juanfranciscoornelas hybridizationanddifferentialintrogressionassociatedwithenvironmentalshiftsinamistletoespeciescomplex
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Hybridization and differential introgression associated with environmental shifts in a mistletoe species complex

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