Clonal Reproduction and Polyploidy in Unisexual Hybrids of Phoxinus eos and Phoxinus neogaeus (Pisces; Cyprinidae)

Dawley, Robert M.; Schultz, R. Jack; Goddard, Kathryn

doi:10.2307/1445762

Cited by 71 publications

(65 citation statements)

References 25 publications

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“…But they may act as a supplier of unreduced diploid eggs, which give rise to triploid development after fertilization with sperm of bisexual diploids in nature. The production of such unreduced eggs by interspecific hybridization has been reported in teleosts including Salmo species (Johnson and Wright, 1986), Phoxinus species (Dawley et al, 1987;Dawley and Goddard, 1988;Goddard and Dawley, 1990), sunfish (Dawley et al, 1985;Dawley, 1987), medaka species (Sakaizumi et al, 1993;Kurita et al, 1995;Shimizu et al, 2000), and Fundulus species (Dawley, 1992). Similar results were also reported in Cnemidophorus in Reptiles (Dessauer and Cole, 1989;Moritz et al, 1989).…”

Section: Genetic Analyses In Diploid Progeny Of Females Mk3 Mk4 Andsupporting

confidence: 55%

Disruption of normal meiosis in artificial inter-populational hybrid females of Misgurnus loach

2008

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Artificial cross between two genetically different populations of JapaneseMisgurnus loach was made to examine the reproductive capacity of the artificial inter-populational hybrid females. Ploidy status and microsatellite genotypes of the eggs laid by these hybrids were inferred from those determined in progenies developed by normal fertilization with haploid loach sperm, induced gynogenesis with UV-irradiated goldfish sperm and/or hybridization with intact goldfish sperm. Some hybrid females laid unreduced diploid eggs genetically identical to the mother. However, these diploid eggs could not develop by spontaneous gynogenesis, but grow to triploid by incorporation of a sperm nucleus. Other hybrid females laid haploid eggs together with diploid eggs and/or various aneuploid and polyploid eggs. Thus, a disruption of normal meiosis occurred in inter-populational hybrid females. The results suggested that the two populations should be so distant as to give rise to atypical formation of unreduced and other unusual eggs in their hybrids.

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Section: Genetic Analyses In Diploid Progeny Of Females Mk3 Mk4 Andsupporting

confidence: 55%

Disruption of normal meiosis in artificial inter-populational hybrid females of Misgurnus loach

2008

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“…Approximately 50 named species of sperm-dependent unisexual vertebrates have been described. Gynogenetic taxa can be found for example in livebearing fishes of the family Poeciliidae (25), silverside fishes in the family Atherinidae (26), several minnows in the family Cyprinidae (27), loach fishes in the family Cobitidae (28), some cyprinodontid killifishes (29), and mole salamanders in the family Ambystomatidae (30).…”

Section: Vertebrate Clonality Under Human Auspicesmentioning

confidence: 99%

Evolutionary perspectives on clonal reproduction in vertebrate animals

Avise

2015

Proc. Natl. Acad. Sci. U.S.A.

100

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A synopsis is provided of different expressions of whole-animal vertebrate clonality (asexual organismal-level reproduction), both in the laboratory and in nature. For vertebrate taxa, such clonal phenomena include the following: human-mediated cloning via artificial nuclear transfer; intergenerational clonality in nature via parthenogenesis and gynogenesis; intergenerational hemiclonality via hybridogenesis and kleptogenesis; intragenerational clonality via polyembryony; and what in effect qualifies as clonal replication via self-fertilization and intense inbreeding by simultaneous hermaphrodites. Each of these clonal or quasi-clonal mechanisms is described, and its evolutionary genetic ramifications are addressed. By affording an atypical vantage on standard vertebrate reproduction, clonality offers fresh perspectives on the evolutionary and ecological significance of recombination-derived genetic variety.cloning | asexuality | unisexuality | parthenogenesis | polyembryony

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“…We further investigated the extent of DNA methylation polymorphism at a candidate locus (I6; 26 resulted from a few ancestral hybridization events between female finescale dace (C. neogaeus) and male northern redbelly dace (C. eos). 27 The diploid C. eos-neogaeus hybrids are pseudogamous and reproduce clonally via gynogenesis. 28 The presence of only a few clonal lineages throughout heterogeneous habitats represents an exceptional natural system to investigate naturally occurring epigenetic variation not related to genetic variation.…”

Section: O N O T D I S T R I B U T Ementioning

confidence: 99%