Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations

Abstract Cave-dwelling taxa often share the same phenotypic modifications like absence of eyes and pigmentation. These “troglomorphic characters” are expressed in the populations of Garra barreimiae from the Al Hoota Cave and nearby Hoti Pit in Northern Oman. Surface morphotypes of this cyprinid spe...

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Autores principales:	Sandra Kirchner, Helmut Sattmann, Elisabeth Haring, Lukas Plan, Reginald Victor, Luise Kruckenhauser
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7318e1d86945407bb9d989901d938b76
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spelling	oai:doaj.org-article:7318e1d86945407bb9d989901d938b762021-12-02T12:30:18ZInvestigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations10.1038/s41598-017-05194-32045-2322https://doaj.org/article/7318e1d86945407bb9d989901d938b762017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05194-3https://doaj.org/toc/2045-2322Abstract Cave-dwelling taxa often share the same phenotypic modifications like absence of eyes and pigmentation. These “troglomorphic characters” are expressed in the populations of Garra barreimiae from the Al Hoota Cave and nearby Hoti Pit in Northern Oman. Surface morphotypes of this cyprinid species are common throughout the distribution area. Very rarely individuals with intermediate phenotypes can be found. In the present study, potential gene flow between cave and surface populations was tested and population structure within five sampling sites was assessed. Overall, 213 individuals were genotyped at 18 microsatellite loci. We found that the cave populations have lower genetic diversity and are clearly isolated from the surface populations, which seem to be sporadically in contact with each other. The results indicate a recent genetic bottleneck in the cave populations. Thus, it can be assumed that during climatic changes the connection between cave and surface water bodies was disjoined, leaving a subpopulation trapped inside. Nevertheless, occasional gene flow between the morphotypes is detectable, but hybridisation seems only possible in cave habitat with permanent connection to surface water. Individuals from surface sites bearing intermediate phenotypes but cave genotypes imply that phenotypic plasticity might play a role in the development of the phenotype.Sandra KirchnerHelmut SattmannElisabeth HaringLukas PlanReginald VictorLuise KruckenhauserNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sandra Kirchner Helmut Sattmann Elisabeth Haring Lukas Plan Reginald Victor Luise Kruckenhauser Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
description	Abstract Cave-dwelling taxa often share the same phenotypic modifications like absence of eyes and pigmentation. These “troglomorphic characters” are expressed in the populations of Garra barreimiae from the Al Hoota Cave and nearby Hoti Pit in Northern Oman. Surface morphotypes of this cyprinid species are common throughout the distribution area. Very rarely individuals with intermediate phenotypes can be found. In the present study, potential gene flow between cave and surface populations was tested and population structure within five sampling sites was assessed. Overall, 213 individuals were genotyped at 18 microsatellite loci. We found that the cave populations have lower genetic diversity and are clearly isolated from the surface populations, which seem to be sporadically in contact with each other. The results indicate a recent genetic bottleneck in the cave populations. Thus, it can be assumed that during climatic changes the connection between cave and surface water bodies was disjoined, leaving a subpopulation trapped inside. Nevertheless, occasional gene flow between the morphotypes is detectable, but hybridisation seems only possible in cave habitat with permanent connection to surface water. Individuals from surface sites bearing intermediate phenotypes but cave genotypes imply that phenotypic plasticity might play a role in the development of the phenotype.
format	article
author	Sandra Kirchner Helmut Sattmann Elisabeth Haring Lukas Plan Reginald Victor Luise Kruckenhauser
author_facet	Sandra Kirchner Helmut Sattmann Elisabeth Haring Lukas Plan Reginald Victor Luise Kruckenhauser
author_sort	Sandra Kirchner
title	Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
title_short	Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
title_full	Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
title_fullStr	Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
title_full_unstemmed	Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations
title_sort	investigating gene flow between the blind cavefish garra barreimiae and its conspecific surface populations
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7318e1d86945407bb9d989901d938b76
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Investigating gene flow between the blind cavefish Garra barreimiae and its conspecific surface populations

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