Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany

The distribution and hybridisation zone of the two grass snake species occurring in the German state of Baden-Württemberg are described, based on genetic data from maternally inherited mitochondrial DNA (mtDNA, up to 1983 bp) and biparentally inherited microsatellite DNA (13 loci). In agreement with...

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Main Authors: Nadine Schultze, Hubert Laufer, Carolin Kindler, Uwe Fritz
Format: Article
Language:English
Published: Pensoft Publishers 2019-10-01
Series:Herpetozoa
Online Access:https://herpetozoa.pensoft.net/article/38897/download/pdf/
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author Nadine Schultze
Hubert Laufer
Carolin Kindler
Uwe Fritz
author_facet Nadine Schultze
Hubert Laufer
Carolin Kindler
Uwe Fritz
author_sort Nadine Schultze
collection DOAJ
description The distribution and hybridisation zone of the two grass snake species occurring in the German state of Baden-Württemberg are described, based on genetic data from maternally inherited mitochondrial DNA (mtDNA, up to 1983 bp) and biparentally inherited microsatellite DNA (13 loci). In agreement with previously published morphological evidence, the barred grass snake (Natrix helvetica) occurs in the Upper Rhine Valley and the Black Forest, while the common grass snake (N. natrix, ‘yellow lineage’) is distributed across the remaining, more eastern parts of Baden-Württemberg. Cline analyses across two transects running through the region of Karlsruhe and the Black Forest indicate that the hybrid zone is similarly narrow here as in the previously characterised stretch near Lake Constance. With respect to nuclear DNA, the Black Forest constitutes no impediment to gene flow in comparison with lowland regions (Karlsruhe, Lake Constance). However, on the eastern slope of the Black Forest, the abrupt replacement of mtDNA of N. helvetica by that of N. natrix indicates male-mediated gene flow and that the Black Forest represents a dispersal barrier for female grass snakes.
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spelling doaj.art-2d2a92564ef0497389cc171aaacfb0002022-12-21T23:36:39ZengPensoft PublishersHerpetozoa1013-44252682-955X2019-10-013222923610.3897/herpetozoa.32.e3889738897Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western GermanyNadine Schultze0Hubert Laufer1Carolin Kindler2Uwe Fritz3Museum of ZoologyBüro für Landschaftsökologie LAUFERMuseum of ZoologyMuseum of ZoologyThe distribution and hybridisation zone of the two grass snake species occurring in the German state of Baden-Württemberg are described, based on genetic data from maternally inherited mitochondrial DNA (mtDNA, up to 1983 bp) and biparentally inherited microsatellite DNA (13 loci). In agreement with previously published morphological evidence, the barred grass snake (Natrix helvetica) occurs in the Upper Rhine Valley and the Black Forest, while the common grass snake (N. natrix, ‘yellow lineage’) is distributed across the remaining, more eastern parts of Baden-Württemberg. Cline analyses across two transects running through the region of Karlsruhe and the Black Forest indicate that the hybrid zone is similarly narrow here as in the previously characterised stretch near Lake Constance. With respect to nuclear DNA, the Black Forest constitutes no impediment to gene flow in comparison with lowland regions (Karlsruhe, Lake Constance). However, on the eastern slope of the Black Forest, the abrupt replacement of mtDNA of N. helvetica by that of N. natrix indicates male-mediated gene flow and that the Black Forest represents a dispersal barrier for female grass snakes.https://herpetozoa.pensoft.net/article/38897/download/pdf/
spellingShingle Nadine Schultze
Hubert Laufer
Carolin Kindler
Uwe Fritz
Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
Herpetozoa
title Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
title_full Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
title_fullStr Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
title_full_unstemmed Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
title_short Distribution and hybridisation of barred and common grass snakes (Natrix helvetica, N. natrix) in Baden-Württemberg, South-western Germany
title_sort distribution and hybridisation of barred and common grass snakes natrix helvetica n natrix in baden wurttemberg south western germany
url https://herpetozoa.pensoft.net/article/38897/download/pdf/
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