EVOLUTIONARY ORIGIN OF A PARTHENOFORM, THE AMAZON MOLLY POECILIA FORMOSA, ON THE BASIS OF A MOLECULAR GENEALOGY

@article{Schartl1995EVOLUTIONARYOO,
  title={EVOLUTIONARY ORIGIN OF A PARTHENOFORM, THE AMAZON MOLLY POECILIA FORMOSA, ON THE BASIS OF A MOLECULAR GENEALOGY},
  author={Manfred Schartl and Brigitta Wilde and Ingo Schlupp and Jakob Parzefall},
  journal={Evolution},
  year={1995},
  volume={49}
}
The appearance of vertebrate species that reproduce without genetic recombination has been explained by their origin from a rare hybridization event between members of two distantly related species. For the first recognized vertebrate unisexual, the Amazon molly Poecilia formosa, mostly morphological and biochemical genetic information has been available so far with respect to its evolutionary origin. DNA sequence analyses of transcribed portions of the genome (tyrosine kinase proto‐oncogenes… 
Placing the hybrid origin of the asexual Amazon molly (Poecilia formosa) based on historical climate data
TLDR
This work uses an asexual fish, the Amazon molly, to establish the area in which it was formed via hybridization 125 000 years ago, and finds that model projections to the LIG show a similar map to the present climate model and parental species potentially overlapped in a relatively small area near Tampico, Mexico.
EVIDENCE FOR A MONOPHYLETIC ORIGIN OF TRIPLOID CLONES OF THE AMAZON MOLLY, POECILIA FORMOSA
TLDR
Phylogenetic analysis of microsatellite data provided evidence for a monophyletic origin of the triploid clones of P. formosa, and shared alleles within the triPloid clones between theTriploid and diploid genotypes and between asexual and sexual lineages indicate a recent origin of triploids in Poecilia formosa.
Analysis of a possible independent origin of triploid P. formosa outside of the Río Purificación river system
TLDR
The data support the hypothesis that triploidy was not a single chance event in the evolutionary history of P. formosa and hence might be a relevant mechanism to increase genotypic divergence and at least partially counteract the genetic degeneration connected to asexuality.
MATERNAL ANCESTRY OF THE RUTILUS ALBURNOIDES COMPLEX (TELEOSTEI, CYPRINIDAE) AS DETERMINED BY ANALYSIS OF CYTOCHROME b SEQUENCES
TLDR
Phylogenetic analysis revealed a monophyletic relationship among unisexuals and Leuciscus pyrenaicus, clearly identifying this species as the maternal ancestor of R. alburnoides.
An unexpected recent ancestor of unisexual Ambystoma
TLDR
It is estimated that the unisexual Ambystoma complex was formed from a hybridization event in which the nuclear DNA of the original maternal species was subsequently lost, and probably originated less than 25 000 years ago.
Monophyletic origin of multiple clonal lineages in an asexual fish (Poecilia formosa)
TLDR
The molecular phylogenetic evidence and the failure to resynthesize the gynogenetic P. formosa together with the old age of the species indicate that some unisexual vertebrates might be rare not because they suffer the long‐term consequences of clonal reproduction but because they are only very rarely formed as a result of complex genetic preconditions necessary to produce viable and fertile clonal genomes and phenotypes.
Clonal polymorphism and high heterozygosity in the celibate genome of the Amazon molly
TLDR
The data suggest that asexual vertebrate lineages are scarce not because they are at a disadvantage, but because the genomic combinations required to bypass meiosis and to make up a functioning hybrid genome are rarely met in nature.
Description of Poecilia (Acanthophacelus) obscura n. sp., (Teleostei: Poeciliidae), a new guppy species from western Trinidad, with remarks on P. wingei and the status of the "Endler's guppy"
TLDR
A mitochondrial DNA-sequence based molecular phylogenetic analysis revealed the status of the new species as a separate taxon, Poecilia obscura, which is described from the Oropuche system, Trinidad and can be distinguished by morphometrics and gonopodial characteristics from these two species, although the ranges for all values overlap.
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TLDR
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TLDR
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TLDR
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TLDR
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