Mitochondrial DNA signatures of restricted gene flow within divergent lineages of an atyid shrimp (Paratya australiensis)

Baker, Andrew; Hurwood, David A.; Krogh, Martin; Hughes, Jane

doi:10.1038/sj.hdy.6800493

Cited by 21 publications

(23 citation statements)

References 41 publications

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“…The presence of similar traits and gene sequences among two different species is not necessarily evidence for contemporary gene flow between species [72], [73], [74]. The question is whether the occurrence of a ‘hybrid P. citri ’ population, as shown in our present study, is a modern event brought about by anthropogenic activity, or whether, in fact, P. ficus resulted from sympatric speciation.…”

Section: Discussionmentioning

confidence: 64%

“…However, the question of whether the separation between P. citri and P. ficus is a result of sympatric or allopatric speciation is still open; shared traits among sympatric and allopatric populations of the same species are evidence for ancient rather than contemporary gene flow [73]. Other studies suggest that introgression could be a significant source of genetic variation in hybridizing species groups [85].…”

Section: Discussionmentioning

confidence: 99%

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Evidence for Gene Flow between Two Sympatric Mealybug Species (Insecta; Coccoidea; Pseudococcidae)

et al. 2014

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Occurrence of inter-species hybrids in natural populations might be evidence of gene flow between species. In the present study we found evidence of gene flow between two sympatric, genetically related scale insect species – the citrus mealybug Planococcus citri (Risso) and the vine mealybug Planococcus ficus (Signoret). These species can be distinguished by morphological, behavioral, and molecular traits. We employed the sex pheromones of the two respective species to study their different patterns of male attraction. We also used nuclear ITS2 (internal transcribed spacer 2) and mitochondrial COI (Cytochrome c oxidase sub unit 1) DNA sequences to characterize populations of the two species, in order to demonstrate the outcome of a possible gene flow between feral populations of the two species. Our results showed attraction to P. ficus pheromones of all tested populations of P. citri males but not vice versa. Furthermore, ITS2 sequences revealed the presence of ‘hybrid females’ among P. citri populations but not among those of P. ficus. ‘hybrid females’ from P. citri populations identified as P. citri females according to COI sequences. We offer two hypotheses for these results. 1) The occurrence of phenotypic and genotypic traits of P. ficus in P. citri populations may be attributed to both ancient and contemporary gene flow between their populations; and 2) we cannot rule out that an ancient sympatric speciation by which P. ficus emerged from P. citri might have led to the present situation of shared traits between these species. In light of these findings we also discuss the origin of the studied species and the importance of the pherotype phenomenon as a tool with which to study genetic relationships between congener scale insects.

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Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Evidence for Gene Flow between Two Sympatric Mealybug Species (Insecta; Coccoidea; Pseudococcidae)

et al. 2014

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“…Although numerous studies have utilized mitochondrial genes to explore the phylogeography (e.g., Hurwood and Hughes, 2001;Chenoweth and Hughes, 2003;Hurwood et al, 2003;Baker et al, 2004) and evolution (e.g., Page et al, 2005;Porter et al, 2005;Page et al, in press) of the Atyidae, a complete mitochondrial genome from this crustacean group has not been reported. Here, we present the complete mitochondrial genome sequence of the endemic Hawaiian atyid Halocaridina rubra, Holthuis 1963(Holthuis, 1963.…”

Section: Introductionmentioning

confidence: 98%

The complete mitochondrial genome of the Hawaiian anchialine shrimp Halocaridina rubra Holthuis, 1963 (Crustacea: Decapoda: Atyidae)

Ivey

Santos

2007

Gene

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“…However, Williams (1977) recognised only one Australia-wide species, P. australiensis. More recently, genetic studies have shown that P. australiensis may be a species complex (Baker et al 2004;Cook et al 2006Cook et al , 2007Hughes et al 1995). Previous mitochondrial and allozyme studies on this species indicated a high level of structuring resulting from limited dispersal (Hughes et al 1995;Hurwood et al 2003).…”

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confidence: 96%

Microsatellite markers for the freshwater shrimp Paratya australiensis (Atyidae)

Green

Clarke

Mackay

et al. 2010

Conservation Genet Resour

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Paratya australiensis is a common freshwater shrimp found in most catchments in south-eastern Australia. Microsatellite loci were isolated from a partial genomic library created using 454 sequencing. Of the 25 tested, 13 were found to be polymorphic, however, for pooling purposes only 12 were used for genotyping. The number of alleles per locus varied from 2 to 14 in a population from Wakefield River, South Australia, and the mean (range) observed and expected heterozygosity were 0.512 (0.136-0.909) and 0.590 (0.165-0.788), respectively across all alleles. These microsatellites will be used to study the genetic structure of populations in two catchments in South Australia.

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Mitochondrial DNA signatures of restricted gene flow within divergent lineages of an atyid shrimp (Paratya australiensis)

Cited by 21 publications

References 41 publications

Evidence for Gene Flow between Two Sympatric Mealybug Species (Insecta; Coccoidea; Pseudococcidae)

Evidence for Gene Flow between Two Sympatric Mealybug Species (Insecta; Coccoidea; Pseudococcidae)

The complete mitochondrial genome of the Hawaiian anchialine shrimp Halocaridina rubra Holthuis, 1963 (Crustacea: Decapoda: Atyidae)

Microsatellite markers for the freshwater shrimp Paratya australiensis (Atyidae)

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