Research Topics
| James MalletSummaryAffiliation: University College London Country: UK Publications
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Detail Information
Publications
Natural hybridization in heliconiine butterflies: the species boundary as a continuumJames Mallet
Galton Laboratory, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK
BMC Evol Biol 7:28. 2007..To understand speciation and the maintenance of taxa as separate entities, we need information about natural hybridization and gene flow among species...- Group selection and the development of the biological species conceptJames Mallet
Radcliffe Institute, Harvard University, Byerly Hall, 8 Garden Street, Cambridge, MA 02138, USA
Philos Trans R Soc Lond B Biol Sci 365:1853-63. 2010..Few vestiges of group selectionism and species-level adaptationism remain in recent reviews of speciation. One wonders how many of our own cherished views on evolution will seem as odd to future biologists... 
Space, sympatry and speciationJ Mallet
Wissenschaftskolleg zu Berlin, Institute for Advanced Study Berlin, Germany
J Evol Biol 22:2332-41. 2009..Ecological adaptation in two-dimensional space often acts as a 'magic trait' that causes pleiotropic reductions of gene flow. We provide examples from our own research...- Hybridization, ecological races and the nature of species: empirical evidence for the ease of speciationJames Mallet
Galton Laboratory, University College London, 4 Stephenson Way, London NW1 2HE, UK
Philos Trans R Soc Lond B Biol Sci 363:2971-86. 2008..The lack of a hiatus between species and ecological races suggests that speciation may occur, perhaps frequently, in sympatry, and the abundant intermediate stages suggest that it is happening all around us. Speciation is easy!.. 
Hybrid speciationJames Mallet
Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE, UK
Nature 446:279-83. 2007..Now, new genetic evidence suggests that hybrid speciation, even without polyploidy, is more common in plants and also animals than we thought...- What does Drosophila genetics tell us about speciation?James Mallet
Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London, UK, NW1 2HE
Trends Ecol Evol 21:386-93. 2006..Work with these organisms has complemented Drosophila studies of hybrid unfitness to provide a more complete understanding of speciation... - Molecular phylogenetics of the neotropical butterfly subtribe Oleriina (Nymphalidae: Danainae: Ithomiini)Donna Lisa de-Silva
Department of Genetics, Evolution and Environment, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK
Mol Phylogenet Evol 55:1032-41. 2010.... - Strikingly variable divergence times inferred across an Amazonian butterfly 'suture zone'Alaine Whinnett
University College London, Galton Laboratory, 4 Stephenson Way, London NW1 2HE, UK
Proc Biol Sci 272:2525-33. 2005..Our data therefore strongly refute a simple hypothesis of simultaneous vicariance and suggest that ongoing parapatric or other modes of differentiation in continuous forest may be important in driving diversification in Amazonia... - Polyphyly and gene flow between non-sibling Heliconius speciesVanessa Bull
Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE, UK
BMC Biol 4:11. 2006..melpomene (Lepidoptera: Nymphalidae), whose distributions overlap in Central and Northwestern South America... - Mimicry: developmental genes that contribute to speciationRussell E Naisbit
The Galton Laboratory, Department of Biology, University College London, London NW1 2HE, UK
Evol Dev 5:269-80. 2003..Therefore, although developmental and genomic constraints undoubtedly influence the evolutionary process, their effects are probably not strong in comparison with natural selection... - Genetic analysis of a wild-caught hybrid between non-sister Heliconius butterfly speciesKanchon K Dasmahapatra
Galton Laboratory, Department of Biology, University College London, London NW1 2HE, UK
Biol Lett 3:660-3. 2007..Adaptive genes such as those involved in wing coloration could thus be widely shared among members of this highly mimetic genus... - Hybrid sterility, Haldane's rule and speciation in Heliconius cydno and H. melpomeneRussell E Naisbit
The Galton Laboratory, Department of Biology, University College London, London NW1 2HE, United Kingdom
Genetics 161:1517-26. 2002..The effect of female sterility is comparable to that of selection against non-mimetic hybrids, while mate choice forms a much stronger barrier to gene transfer... - Inferences from a rapidly moving hybrid zoneKanchon K Dasmahapatra
Department of Biology, University College London, United Kingdom
Evolution 56:741-53. 2002..Hybrid zone movement has rarely been considered likely in the past, but our results show that it may be more important in biogeography and evolution than generally realized... - What initiates speciation in passion-vine butterflies?W O McMillan
Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London, NW1 2HE, United Kingdom
Proc Natl Acad Sci U S A 94:8628-33. 1997..These results add to a growing body of evidence that challenge the importance of genomic incompatibilities in the earliest stages of speciation... - Disruptive sexual selection against hybrids contributes to speciation between Heliconius cydno and Heliconius melpomeneR E Naisbit
The Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE, UK
Proc Biol Sci 268:1849-54. 2001.... - Host-induced assortative mating in host races of the larch budmothI Emelianov
Galton Laboratory, Department of Biology, University College London, United Kingdom
Evolution 55:2002-10. 2001..Sympatric speciation via pleiotropy between ecological traits and assortative mating may thus be more common than generally supposed: Clumped resource distributions and habitat choice by adults are widespread... - Hybrid zones and the speciation continuum in Heliconius butterfliesJames Mallet
Galton Laboratory, Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
Mol Ecol 21:5643-5. 2012..Now, in this issue of Molecular Ecology, Arias et al. (2012) have found an intermediate case in Colombian Heliconius cydno showing evidence for assortative mating and molecular differences, but where hybrids are abundant... - Genome-wide patterns of divergence and gene flow across a butterfly radiationNicola J Nadeau
Department of Zoology, University of Cambridge, Cambridge, UK
Mol Ecol 22:814-26. 2013..Furthermore, this pattern is almost unique to these genomic regions, with only a very small number of other loci showing significant similarity between populations and species with similar colour patterns... - Unraveling the thread of nature's tapestry: the genetics of diversity and convergence in animal pigmentationMarcus R Kronforst
FAS Center for Systems Biology, Harvard University, Cambridge, MA, USA
Pigment Cell Melanoma Res 25:411-33. 2012..In the near future, additional work in other emerging systems will substantially expand the scope of available comparisons... - Reproductive isolation caused by colour pattern mimicryC D Jiggins
The Galton Laboratory, University College London, 4 Stephenson Way, London NW1 2HE, UK
Nature 411:302-5. 2001..In addition, individuals from a population of H. melpomene allopatric to H. cydno court and mate with H. cydno more readily than those from a sympatric population. This suggests that assortative mating has been enhanced in sympatry... - Disruptive ecological selection on a mating cueRichard M Merrill
Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
Proc Biol Sci 279:4907-13. 2012..Our experiments showed that hybrid colour-pattern phenotypes are attacked more frequently than parental forms. For the first time, we demonstrate disruptive ecological selection on a trait that also acts as a mating cue... - Has adaptive dynamics contributed to the understanding of adaptive and sympatric speciation?S Gourbiere
Galton Laboratory, University College London, London, UK
J Evol Biol 18:1201-4. 2005 - Host races in plant-feeding insects and their importance in sympatric speciationMichele Drès
Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE UK
Philos Trans R Soc Lond B Biol Sci 357:471-92. 2002..Finally, we discuss applications of an understanding of host races in conservation and in managing adaptation by pests to control strategies, including those involving biological control or transgenic parasite-resistant plants... - Host choice promotes reproductive isolation between host races of the larch budmoth Zeiraphera dinianaI Emelianov
Galton Laboratory, Department of Biology, University College London, London, UK
J Evol Biol 16:208-18. 2003..Because resources are normally 'coarse-grained' in space and time, assortative mating due to ecological divergence may be a more important catalyst of sympatric speciation than generally realized... - Limited performance of DNA barcoding in a diverse community of tropical butterfliesMarianne Elias
Institute of Evolutionary Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, UK
Proc Biol Sci 274:2881-9. 2007.... - Genomic evidence for divergence with gene flow in host races of the larch budmothIgor Emelianov
Plant and Invertebrate Ecology Division, Rothamsted Research, Harpenden AL5 2JQ, UK
Proc Biol Sci 271:97-105. 2004..These results, coupled with other recent multilocus analyses of sister species pairs, demonstrate that selection-driven sympatric phase of genetic divergence in the presence of gene flow is a likely feature of speciation... - Species problem solved 100 years agoJames Mallet
Nature 430:503. 2004 - Correlations between adult mimicry and larval host plants in ithomiine butterfliesKeith R Willmott
Department of Entomology, The Natural History Museum, London SW7 5BD, UK
Proc Biol Sci 271:S266-9. 2004..This link between mimicry and host plant could help explain some host-plant and mimicry shifts, which have been important in the radiation of this speciose tropical group... - Phylogenetic discordance at the species boundary: comparative gene genealogies among rapidly radiating Heliconius butterfliesMargarita Beltran
Smithsonian Tropical Research Institute, AA2072 Balboa, Panama
Mol Biol Evol 19:2176-90. 2002..Our finding of discordant genealogies between genes is consistent with models of adaptive speciation with ongoing gene flow and highlights the need for multiple locus comparisons to resolve phylogeny among closely related species... - Ecology. Refuting refugia?Sandra Knapp
Department of Botany, The Natural History Museum, London SW7 5BD, UK
Science 300:71-2. 2003 - A conserved supergene locus controls colour pattern diversity in Heliconius butterfliesMathieu Joron
Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
PLoS Biol 4:e303. 2006..We also show that adaptive evolution, both convergent and diversifying, can occur by the repeated involvement of the same genomic regions...