Polyphyly and gene flow between non-sibling Heliconius species

Bull, Vanessa; Beltrán, Margarita; Jiggins, Chris D.; McMillan, W. Owen; Bermingham, Eldredge; Mallet, James

doi:10.1186/1741-7007-4-11

Cited by 117 publications

(57 citation statements)

References 77 publications

(108 reference statements)

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“…Finally, our approach could also be extended to scan the genome for regions that contribute to reproductive isolation Bull et al 2006;Geraldes et al 2006;Miller et al 2006). Indeed, models of parapatric speciation predict that loci involved in the formation of species will experience no or little gene flow since the split and therefore have more fixed differences and fewer shared alleles than do background loci.…”

Section: Discussion Advantages and Limitations Of Mimarmentioning

confidence: 99%

“…The parameters are estimated from all the polymorphism data at a single locus (Nielsen and Wakeley 2001) or at multiple loci , using Markov Chain Monte Carlo (MCMC). The Hey and Nielsen method, henceforth called IM, has been applied to a number of species, from Heliconius (Bull et al 2006) to cichlids . These applications suggest that speciation often occurs in the presence of some gene flow (Hey 2006).…”

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confidence: 99%

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A new approach to estimate parameters of speciation models with application to apes

Becquet¹,

Przeworski²

2007

Genome Res.

237

302

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How populations diverge and give rise to distinct species remains a fundamental question in evolutionary biology, with important implications for a wide range of fields, from conservation genetics to human evolution. A promising approach is to estimate parameters of simple speciation models using polymorphism data from multiple loci. Existing methods, however, make a number of assumptions that severely limit their applicability, notably, no gene flow after the populations split and no intralocus recombination. To overcome these limitations, we developed a new Markov chain Monte Carlo method to estimate parameters of an isolation-migration model. The approach uses summaries of polymorphism data at multiple loci surveyed in a pair of diverging populations or closely related species and, importantly, allows for intralocus recombination. To illustrate its potential, we applied it to extensive polymorphism data from populations and species of apes, whose demographic histories are largely unknown. The isolation-migration model appears to provide a reasonable fit to the data. It suggests that the two chimpanzee species became reproductively isolated in allopatry ∼850 Kya, while Western and Central chimpanzee populations split ∼440 Kya but continued to exchange migrants. Similarly, Eastern and Western gorillas and Sumatran and Bornean orangutans appear to have experienced gene flow since their splits ∼90 and over 250 Kya, respectively.

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Section: Discussion Advantages and Limitations Of Mimarmentioning

confidence: 99%

mentioning

confidence: 99%

A new approach to estimate parameters of speciation models with application to apes

Becquet¹,

Przeworski²

2007

Genome Res.

237

302

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“…Hybridization in Heliconius has hitherto been examined genetically only in a few cases that involve closely related species: Heliconius erato and Heliconius himera, or Heliconius melpomene and Heliconius cydno (Jiggins et al 1997;Bull et al 2006;Kronforst et al 2006). In all other cases, inferences of hybridization have been made on the basis of phenotypes of wildcaught specimens.…”

Section: Introductionmentioning

confidence: 99%

Genetic analysis of a wild-caught hybrid between non-sisterHeliconiusbutterfly species

et al. 2007

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Interspecific hybridization occurs regularly in wild Heliconius butterflies, although hybrid individuals are usually very rare. However, hybridization generally occurs only between the most closely related species. We report a rare naturally occurring hybrid between non-sister species and carry out the first genetic analysis of such distant hybridization. Mitochondrial and nuclear genes indicate that the specimen is an F 1 hybrid between a female Heliconius ethilla and a male Heliconius melpomene, originating from a group of 13 species estimated to have diverged over 2.5 Myr ago. The presence of such distant natural hybrids, together with evidence for backcrossing, suggests that gene flow across species boundaries can take place long after speciation. Adaptive genes such as those involved in wing coloration could thus be widely shared among members of this highly mimetic genus.

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“…To support the hypothesis of interspecific gene exchange, several studies [22,[83][84][85] have invoked as evidence of hybridization and introgression similar alleles shared among Heliconius species in gene genealogies of various nuclear protein-coding loci (mannose phosphate isomerase, triose phosphate isomerase, distalless, invected, white and scalloped). A limitation of these studies is that each compared variability among species only at one or a few geographical localities.…”

Section: Primer On Selection For Müllerian Mimicry Among Heliconius Smentioning

confidence: 99%

“…Brower [20] combined data for each of these genes in global analyses encompassing multiple geographical regions, and found that many of the 'introgressed' alleles are distributed widely among members of the H. cydno-H. melpomene clade from throughout their geographical ranges, a pattern explained at least as well by retention of ancestral polymorphism as by recent introgressive hybridization [86,87]. Thus, oft-cited claims of ongoing, evolutionarily significant gene flow between H. cydno and H. melpomene [83,84,88] should be viewed with circumspection (as suggested by Kronforst et al [89]). …”

Section: Primer On Selection For Müllerian Mimicry Among Heliconius Smentioning

confidence: 99%

Introgression of wing pattern alleles and speciation via homoploid hybridization inHeliconiusbutterflies: a review of evidence from the genome

Brower

2013

Proc. R. Soc. B.

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The diverse Mü llerian mimetic wing patterns of neotropical Heliconius (Nymphalidae) have been proposed to be not only aposematic signals to potential predators, but also intra-and interspecific recognition signals that allow the butterflies to maintain their specific identities, and which perhaps drive the process of speciation, as well. Adaptive features under differential selection that also serve as cues for assortative mating have been referred to as 'magic traits', which can drive ecological speciation. Such traits are expected to exhibit allelic differentiation between closely related species with ongoing gene flow, whereas unlinked neutral traits are expected to be homogenized to a greater degree by introgression. However, recent evidence suggests that interspecific hybridization among Heliconius butterflies may have resulted in adaptive introgression of these very same traits across species boundaries, and in the evolution of new species by homoploid hybrid speciation. The theory and data supporting various aspects of the apparent paradox of 'magic trait' introgression are reviewed, with emphasis on population genomic comparisons of Heliconius melpomene and its close relatives.

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Polyphyly and gene flow between non-sibling Heliconius species

Cited by 117 publications

References 77 publications

A new approach to estimate parameters of speciation models with application to apes

A new approach to estimate parameters of speciation models with application to apes

Genetic analysis of a wild-caught hybrid between non-sisterHeliconiusbutterfly species

Introgression of wing pattern alleles and speciation via homoploid hybridization inHeliconiusbutterflies: a review of evidence from the genome

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