Intraspecific genetic variation in the common midwife toad (Alytes obstetricans): subspecies assignment using mitochondrial and microsatellite markers

2013 ◽  
Vol 52 (2) ◽  
pp. 170-175 ◽  
Author(s):  
Bruno Maia-Carvalho ◽  
Helena Gonçalves ◽  
Iñigo Martínez-Solano ◽  
Jorge Gutiérrez-Rodríguez ◽  
Susana Lopes ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Microsatellite Markers ◽  
The Common ◽  
Intraspecific Genetic Variation ◽  
Midwife Toad ◽  
Alytes Obstetricans

scholarly journals Hybrid zone genomics supports candidate species in Iberian Alytes obstetricans

2020 ◽  
Vol 41 (1) ◽  
pp. 105-112
Author(s):  
Christophe Dufresnes ◽  
Íñigo Martínez-Solano
Keyword(s):  
Hybrid Zone ◽  
Molecular Taxonomy ◽  
Grey Zone ◽  
Transect Sampling ◽  
Genomic Approach ◽  
Candidate Species ◽  
The Common ◽  
Decisive Evidence ◽  
Midwife Toad ◽  
Alytes Obstetricans

Abstract While estimates of genetic divergence are increasingly used in molecular taxonomy, hybrid zone analyses can provide decisive evidence for evaluating candidate species. Applying a population genomic approach (RAD-sequencing) to a fine-scale transect sampling, we analyzed the transition between two Iberian subspecies of the common midwife toad (Alytes obstetricans almogavarii and A. o. pertinax) in Catalonia (northeastern Spain), which putatively diverged since the Plio-Pleistocene. Their hybrid zone was remarkably narrow, with extensive admixture restricted to a single locality (close to Tarragona), and congruent allele frequency clines for the mitochondrial (13 km wide) and the average nuclear genomes (16 km wide). We also fitted clines independently for 89 taxon-diagnostic SNPs: most of them behave like the nuclear background, but a subset (13%) is completely impermeable to gene flow and might be linked to barrier loci involved in hybrid incompatibilities. Assuming that midwife toads are able to disperse in the area of contact, we conclude that these taxa experience partial reproductive isolation and represent incipient species, i.e. Alytes almogavarii and Alytes obstetricans. Interestingly, their evolutionary age and mitochondrial divergence fall below the thresholds proposed in molecular systematics studies, emphasizing the difficulty of predicting the outcome of secondary contacts between young lineages entering the grey zone of speciation.

The roles of allopatric fragmentation and niche divergence in intraspecific lineage diversification in the common midwife toad (Alytes obstetricans )

2018 ◽  
Vol 45 (9) ◽  
pp. 2146-2158 ◽  
Author(s):  
Bruno Maia-Carvalho ◽  
Cândida Gomes Vale ◽  
Fernando Sequeira ◽  
Nuno Ferrand ◽  
Iñigo Martínez-Solano ◽  
...  
Keyword(s):  
Niche Divergence ◽  
The Common ◽  
Midwife Toad ◽  
Alytes Obstetricans ◽  
Lineage Diversification

Genetic variation in three Chinese peat mosses (Sphagnum) based on microsatellite markers, with primer information and analysis of ascertainment bias

2008 ◽  
Vol 111 (2) ◽  
pp. 271-281 ◽  
Author(s):  
A. Jonathan Shaw ◽  
Tong Cao ◽  
Li-song Wang ◽  
Kjell Ivar Flatberg ◽  
Bergfrid Flatberg ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Microsatellite Markers ◽  
Ascertainment Bias

Development of microsatellite markers for a diving duck, the common pochard (Aythya ferina)

2011 ◽  
Vol 3 (3) ◽  
pp. 573-576 ◽  
Author(s):  
Ondřej Št’ovíček ◽  
Dagmar Čížková ◽  
Yang Liu ◽  
Tomáš Albrecht ◽  
Gerald Heckel ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Diving Duck ◽  
The Common ◽  
Common Pochard
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