Hybridization in the Sea

Gardner, J. P. A.

doi:10.1016/s0065-2881(08)60221-7

Cited by 130 publications

(136 citation statements)

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“…Secondary contact among recently diverged taxa, along with a host of other factors (e.g. external fertilization, weak behavioral isolation, niche overlap and unequal abundance of parental species) facilitate potential interspecific mating (Gardner, 1997;Volmer and Palumbi, 2002;. There are several possible outcomes when two species interbreed.…”

Section: Introductionmentioning

confidence: 99%

Surgeons and suture zones: Hybridization among four surgeonfish species in the Indo-Pacific with variable evolutionary outcomes

DiBattista

Whitney

Craig

et al. 2016

Molecular Phylogenetics and Evolution

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Surgeons and suture zones: Hybridization among four surgeonfish species in the Indo-Pacific with variable evolutionary outcomes, Molecular Phylogenetics and Evolution (2016), doi: http:// dx.doi.org/10. 1016/j.ympev.2016.04.036 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. . japonicus and A. nigricans) are distinguishable only at a population or subspecies level (Φ ST = 0.6533, P < 0.001). Little population structure was observed within species, with evidence of recent population expansion across all four geographic ranges. We detected sharing of mtDNA haplotypes between species and extensive hybridization based on microsatellites, consistent with later generation hybrids but also the effects of allele homoplasy. Despite extensive introgression, 98% of specimens had 3 concordance between mtDNA lineage and species identification based on external morphology, indicating that species integrity may not be eroding. The A. nigricans complex demonstrates a range of outcomes from incomplete speciation to secondary contact to decreasing hybridization with increasing evolutionary depth.

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Section: Introductionmentioning

confidence: 99%

Surgeons and suture zones: Hybridization among four surgeonfish species in the Indo-Pacific with variable evolutionary outcomes

DiBattista

Whitney

Craig

et al. 2016

Molecular Phylogenetics and Evolution

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“…Hybrid zones are of interest to biologists for insights that they provide into interactions between genetically differentiated groups such as species or lineages (Harrison, 1990;Gardner, 1997;Abbott et al, 2013). Natural hybridisation, on land and in the sea, is reasonably common and widespread across plant and animal taxa, and has been occurring for millions of years (Harrison, 1990;Arnold, 1997;Gardner, 1997).…”

Section: Introductionmentioning

confidence: 99%

The genetic architecture of hybridisation between two lineages of greenshell mussels

Gardner

Wei

2014

Heredity

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A multidisciplinary approach has identified sigmoidal genetic clines on the east and west coasts in central New Zealand where low-density ecological interactions occur between northern and southern lineages of the endemic greenshell mussel, Perna canaliculus. The sigmoidal clines indicate the existence of a mussel hybrid zone in a region of genetic discontinuities for many continuously distributed coastal taxa, in particular marine invertebrates. Examination of the genetic architecture of the hybrid zone revealed the differential contribution of individual microsatellite loci and/or alleles to defining the zone of interaction and no evidence of increased allelic richness or heterozygosity inside versus outside the hybrid zone. Genomics cline analysis identified one locus in particular (Pcan1-27) as being different from neutral expectations, thereby contributing to lineage differentiation. Estimates of contemporary gene flow revealed very high levels of within-lineage self-recruitment and a hybrid zone composed mostly (~85%) of northern immigrants. Broad scale interpretation of these results is consistent with a zone of genetic interaction that was generated between 0.3 and 1.3 million years before present at a time of pronounced global sealevel change. At that time, the continuous distribution of the greenshell mussel was split into northern and southern groups, which differentiated to become distinct lineages, and which have subsequently been reunited (secondary contact) resulting in the generation of the hybrid zone at~42°S.

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“…Pre-zygotic factors include mate recognition and morphological constraints (e.g. Collins & Tuskes 1979;Gardner 1997;Coyne & Orr 2004). Genetic incompatibility is referred to as the post-zygotic element (Dobzhansky 1937(Dobzhansky , 1940Coyne & Orr 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Several factors, including behaviour, genetic, habitat, and morphological characteristics, are generally associated with the natural hybridization process (see Gardner 1997 for a review). Barriers to hybridization have been explored in many taxa (see Howard & Berlocher 1998 for a review), but little is known in decapod crustaceans.…”

Section: Introductionmentioning

confidence: 99%

“…Coyne & Orr's (1997) classic studies of Drosophila speciation suggest that different isolation patterns may represent different speciation processes. Conclusions drawn from Drosophila studies indicate that both pre-and post-zygotic isolation will increase with divergence time between taxa, and that pre-zygotic barriers evolve faster than post-zygotic barriers in sympatric species (Coyne & Orr 1989, 1997. Complete post-zygotic and incomplete prezygotic isolation suggest that the incipient speciation between the two shrimp species may have occurred before they lived sympatrically.…”

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confidence: 98%

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Reproductive isolation between two sympatric simultaneous hermaphroditic shrimp,Lysmata wurdemanniandL. boggessi

Zhang

Lin

Hardege

et al. 2009

Marine Biology Research

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To investigate pre-and post-zygotic isolation between two sympatric and phylogenetically related species of Lysmata shrimp, two assays were conducted in the laboratory: (1) no specific mate choice where mating between the two species was 'forced'; (2) specific mate choice or preference where a female had a choice between conspecific and heterospecifc males. Behavioural studies reveal that female L. wurdemanni accepted only conspecific male shrimp, whereas L. boggessi females would mate with an interspecific male if there was no conspecific male present. When males of both species were present, L. boggessi females always mated with the conspecific male. Male L. boggessi in general did not respond to the sex pheromones secreted by female L. wurdemanni and did not display any pre-copulatory behaviour to newly moulted female L. wurdemanni. On the other hand, some male L. wurdemanni responded to female L. boggessi. Although mating was successful between male L. wurdemanni and female L. boggessi, the resulting embryos lived at most for 10 days and failed to hatch. The results indicate that the two species are both pre-zygotically and post-zygotically isolated. Behavioural observation suggests that chemical cues are most likely responsible for pre-zygotic isolation.

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Hybridization in the Sea

Cited by 130 publications

References 143 publications

Surgeons and suture zones: Hybridization among four surgeonfish species in the Indo-Pacific with variable evolutionary outcomes

Surgeons and suture zones: Hybridization among four surgeonfish species in the Indo-Pacific with variable evolutionary outcomes

The genetic architecture of hybridisation between two lineages of greenshell mussels

Reproductive isolation between two sympatric simultaneous hermaphroditic shrimp,Lysmata wurdemanniandL. boggessi

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