Electrophoretic Evidence of Triploidy Associated with Populations of the Gynogenetic Teleost Poecilia formosa

Balsano, Joseph S.; Darnell, Rezneat M.; Abramoff, Peter

doi:10.2307/1442490

Cited by 62 publications

(32 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…30%) for P. formosa than is usually seen in bisexual species. Moreover, for some proteins, the P. formosa samples were the additive combination of the patterns of P. latipinna and P. mexicana Balsano et al 1972;Balsano and Rasch 1974;Turner et al 1980b;Turner 1982). These data are suggestive with respect to a possible hybrid origin of P. formosa, but not totally conclusive.…”

mentioning

confidence: 83%

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

et al. 1995

View full text Add to dashboard Cite

Abstract.-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 Poeciliaformosa, 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) demonstrated its hybrid state unequivocally. Both alleles can be traced in a DNA sequence-based phylogenetic tree to extant species that represent the parental species or that are closely related to the corresponding extinct forms, namely P. mexicana limantouri and a so far taxonomically ill-defined north Mexican subspecies of the P. latipinna/P. velifera complex. A rough estimate from the mutation rates dates the hybridization event further back than would have been predicted on the basis of "Muller's ratchet" for an ecologically successful species.

show abstract

mentioning

confidence: 83%

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

et al. 1995

View full text Add to dashboard Cite

show abstract

“…. The analysis of chromosomal complements and electrophoretic data have indicated that the triploid form originated from crosses of diploid hybrid females with males of related species [5,10] . Based on studies with unisexual fishes of the genus Poeciliopsis Schultz suggested that normal meiotic processes often were disrupted in interspecific hybrids and these hybrids produced unreduced ova that, upon backcrossing with one of the sexual ancestors, lead to new polyploid (allotriploid) biotypes [28] .…”

Section: Regarding Unreduced Oocytementioning

confidence: 99%

Two unisexual artificial polyploid clones constructed by genome addition of common carp (Cyprinus carp) and crucian carp (Carassius auratus)

Dong

2003

Sci China Ser C

View full text Add to dashboard Cite

A polyploid hybrid fish with natural gynogenesis can prevent segregation and maintain their hybrid vigor in their progenies. Supposing the reproduction mode of induced polyploid fish being natural gynogenesis, allopolyploid hybrid between common carp and crucian carp into allopolyploid was performed. The purpose of this paper is to describe a lineage from sexual diploid carp transforming into allotriploid and allotetraploid unisexual clones by genome addition. The diploid hybrid between common carp and crucian carp reproduces an unreduced nucleus consisting of two parental genomes. This unreduced female pronucleus will fuse with male pronucleus and form allotriploid zygote after penetration of related species sperms. Allotriploid embryos grow normally, and part of female allotriploid can produce unreduced mature ova with three genomes. Mature ova of most allotriploid females are provided with natural gynogenetic trait and their nuclei do not fuse with any entrance sperm. All female offspring are produced by gynogenesis of allotriploid egg under activation of penetrating sperms. These offspring maintain morphological traits of their allotriploid maternal and form an allotetraploid unisexual clone by gynogenetic reproduction mode. However, female nuclei of rare allotriploid female can fuse with penetrating male pronuclei and result in the appearance of allotetraploid individuals by means of genome addition. All allotetraploid females can reproduce unreduced mature eggs containing four genomes. Therefore, mature eggs of allotetraploid maintain gynogenetic trait and allotetraploid unisexual clone is produced under activation of related species sperms.Keywords: carp, unreduced, genome addition, allopolyploid, gynogenesis, clone. DOI: 10.1360/02yc0198The application of hybrid vigor and crossbreeding is conventional and proved effective. Nevertheless, the phenotype of the progeny of hybrids, which carry hybrid vigor and produce their offspring through bisexual reproduction, will segregate inevitably and their hybrid vigor will decrease in subsequent generations. The more serious consequence might result in destroying completely those endemic populations when hybrids are released into open water bodies, because hybrids will cross with their related species at random. Therefore, a vigor hybrid biotype with gynogenesis is advantageous. In nature, there are a few of fishes reproducing unisexually their offspring by gynogenesis. These include silver crucian carp (Carassius auratus gibelio) [1,2] auratus langsdorfii of Japan [4] , Poecilia formosa and Poeciliopsis 2monacha-lucida in southern America [5 9] . Cellular and isozymic evidence shows some unisexual allopolyploid fish, amphibian and lizard originated from hybridization [5,8 12] . Even some gynogenetic polyploid fishes have been reported in nature, and some successful attempts have been made to trace the origin of unisexual fish. But unfortunately, the question of whether a new unisexual biotype may be induced from bisexual population by an artificial met...

show abstract

“…Triploid Amazon mollies were first reported in laboratory breeding stocks (Rasch et al 1965;Schultz & Kallman 1968) and soon afterwards were also found in natural populations of the Soto la Marina river system and in the Río Guayalejo (Balsano et al 1972;Turner et al 1983). Triploidization of diploid lineages occurs rather frequently in laboratory breeding stocks.…”

Section: Hybridization Leading To the Intro-gression Of Paternal Genementioning

confidence: 97%

The origin and evolution of a unisexual hybrid:Poecilia formosa

Lampert

Schartl

2008

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

Clonal reproduction in vertebrates can always be traced back to hybridization events as all known unisexual vertebrates are hybrids between recognized species or genetically defined races. Interestingly, clonal vertebrates often also rely on interspecific matings for their reproduction because gynogenesis (sperm-dependent parthenogenesis) and hybridogenesis are common modes of propagation. While in most cases these hybridization events leave no hereditary traces in the offspring, occasionally the genome exclusion mechanism fails and either small parts of male genetic material remain inside the oocyte in the form of microchromosomes, or fusion of the sperm nucleus with the oocyte nucleus leads to polyploid individuals. In this review, we highlight the important role of hybridization for the origin and evolution of a unisexual hybrid: the Amazon molly, Poecilia formosa.

show abstract

Electrophoretic Evidence of Triploidy Associated with Populations of the Gynogenetic Teleost Poecilia formosa

Cited by 62 publications

References 14 publications

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

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

Two unisexual artificial polyploid clones constructed by genome addition of common carp (Cyprinus carp) and crucian carp (Carassius auratus)

The origin and evolution of a unisexual hybrid:Poecilia formosa

Contact Info

Product

Resources

About