A linkage map for the hybridising toads Bombina bombina and B. variegata (Anura: Discoglossidae)

Nürnberger, Beate; Hofman, Sebastian; Förg-Brey, B.; Praetzel, G; Maclean, Alan; Szymura, Jacek M.; Abbott, Catherine M.; Barton, Nick

doi:10.1038/sj.hdy.6800291

Cited by 29 publications

(29 citation statements)

References 44 publications

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“…Second, amphibians have large and complex genomes (Gregory , ), and genomic resources for most amphibian species are largely lacking (but see: Nürnberger et al . ; Smith et al . ; Hellsten et al .…”

Section: Introductionmentioning

confidence: 99%

Genomewide scan for adaptive differentiation along altitudinal gradient in the Andrew's toadBufo andrewsi

Guo

Liao

et al. 2016

Molecular Ecology

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Recent studies of humans, dogs and rodents have started to discover the genetic underpinnings of high altitude adaptations, yet amphibians have received little attention in this respect. To identify possible signatures of adaptation to altitude, we performed a genome scan of 15 557 single nucleotide polymorphisms (SNPs) obtained with restriction site-associated DNA sequencing of pooled samples from 11 populations of Andrew's toad (Bufo andrewsi) from the edge of the Tibetan Plateau, spanning an altitudinal gradient from 1690 to 2768 m.a.s.l. We discovered significant geographic differentiation among all sites, with an average FST = 0.023 across all SNPs. Apart from clear patterns of isolation by distance, we discovered numerous outlier SNPs showing strong associations with variation in altitude (1394 SNPs), average annual temperature (1859 SNPs) or both (1051 SNPs). Levels and patterns of genetic differentiation in these SNPs were consistent with the hypothesis that they have been subject to directional selection and reflect adaptation to altitudinal variation among the study sites. Genes with footprints of selection were significantly enriched in binding and metabolic processes. Several genes potentially related to high altitude adaptation were identified, although the identity and functional significance of most genomic targets of selection remain unknown. In general, the results provide genomic support for results of earlier common garden and low coverage genetic studies that have uncovered substantial adaptive differentiation along altitudinal and latitudinal gradients in amphibians.

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Section: Introductionmentioning

confidence: 99%

Genomewide scan for adaptive differentiation along altitudinal gradient in the Andrew's toadBufo andrewsi

Guo

Liao

et al. 2016

Molecular Ecology

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“…Using allelomorphological features as the coloration of the belly (the so-called spot score developed by Szymura & Barton 1991), the studied population was categorised as a Bombina variegata-like hybrid population (Mara & Hartel, unpubl.). For the lack of genetic data (molecular markers were developed by Nürnberger et al 2003), the studied population was considered as belonging to the species Bombina variegata.…”

Section: Introductionmentioning

confidence: 99%

BREEDING PHENOLOGY AND SPATIO-TEMPORAL DYNAMICS OF POND USE BY THE YELLOW-BELLIED TOAD (BOMBINA VARIEGATA) POPULATION: THE IMPORTANCE OF POND AVAILABILITY AND DURATION

Hartel¹,

Nemes

Mara

2007

Acta Zoologica Lituanica

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Abstract. We analysed the spatial and temporal variation of breeding habitat availability and use by a yellow-bellied toad population in a mixed deciduous forest between 20032005. During this period, the number of temporary ponds was highly variable. Toads tended to exploit newly created breeding habitats or those of which hydroperiod increased due to precipitation. Ponds with intermediate and long duration were preferred for reproduction. We found no evidence of predator avoidance behaviour (aquatic invertebrates and newts) or reproductive failure in ponds containing aquatic predators. Ponds located in sunny patches of the forest were preferred for reproduction. We suggest that ponds that act as sinks in years with low precipitation could contribute to the demography of toad populations in rainy years, when their hydroperiod increases.

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“…Although several studies have looked at other isolating mechanisms through QTL analysis (Bradshaw et al 1998;MacDonald and Goldstein 1999;Fishman et al 2002;Taoet al 2003;Nurnberger et al 2003), this study is among the first to document QTL for conspecific sperm precedence (see also Civetta et al 2002). The QTL approach allows us to estimate the number and location of genetic factors responsible for a difference between two species in a trait, as well as the magnitude of the effect of each QTL.…”

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confidence: 99%

Genetic Architecture of Conspecific Sperm Precedence inAllonemobius fasciatusandA. socius

et al. 2007

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The evolution of barriers to gene exchange is centrally important to speciation. We used the crickets Allonemobius fasciatus and A. socius to investigate the genetic architecture of conspecific sperm precedence (CSP), a postinsemination prezygotic reproductive barrier. With amplified fragment-length polymorphism (AFLP) markers and controlled crosses we constructed linkage maps and estimated positions of QTL associated with CSP. The majority of QTL have low to moderate effects, although a few QTL exist in A. socius with large effects, and the numbers of QTL are comparable to numbers of genes accounting for species differences in other studies. The QTL are spread across many unlinked markers, yet QTL placed with linked markers are on a small number of linkage groups that could reflect the role of the large Allonemobius sex chromosome in prezygotic isolation. Although many QTL had positive effects on conspecific sperm utilization several QTL also exerted negative effects, which could be explained by intraspecific sexual conflict, sperm competition, or epistasis of introgressed genes on novel backgrounds. One unexpected outcome was that A. socius CSP alleles have a stronger effect than those from A. fasciatus in hybrid females, causing hybrids to behave like A. socius with regard to sperm utilization. Implications of this asymmetry in the Allonemobius hybrid zone are discussed.

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A linkage map for the hybridising toads Bombina bombina and B. variegata (Anura: Discoglossidae)

Cited by 29 publications

References 44 publications

Genomewide scan for adaptive differentiation along altitudinal gradient in the Andrew's toadBufo andrewsi

Genomewide scan for adaptive differentiation along altitudinal gradient in the Andrew's toadBufo andrewsi

BREEDING PHENOLOGY AND SPATIO-TEMPORAL DYNAMICS OF POND USE BY THE YELLOW-BELLIED TOAD (BOMBINA VARIEGATA) POPULATION: THE IMPORTANCE OF POND AVAILABILITY AND DURATION

Genetic Architecture of Conspecific Sperm Precedence inAllonemobius fasciatusandA. socius

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