Sperm-dependent parthenogenesis and hybridogenesis in teleost fishes.

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Version: Final published version
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serval:BIB_4A9DD1FDCBDF
Type
A part of a book
Publication sub-type
Chapter: chapter ou part
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Publications
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Title
Sperm-dependent parthenogenesis and hybridogenesis in teleost fishes.
Title of the book
Lost sex : the evolutionary biology of parthenogenesis.
Author(s)
Lamatsch D.K., Stöck M.
Publisher
Springer
Address of publication
Dordrecht
ISBN
978-90-481-2769-6
Publication state
Published
Issued date
2009
Editor
Schoen I., Martens K., van Dijk P.
Chapter
19
Pages
399-432
Language
english
Abstract
In so-called unisexual teleost fishes, a broad spectrum of evolutionaty stages with varying amounts of sexual elements has evolved. These range from pure sperm-dependent parthenogenesis (gynogenesis) without or with different amounts of paternal leakage to hybridogenesis with hemiclonal diploid gametogenesis or genome elimination folowed by meiosis (meiotic hybridogenesis). All of these phenomena are hybrid origin.
Many of these fish form complexes which involve the coexistence of one or more sexually reproducing species with derived all-female forms that have various ploidy levels and reproductive modes, including gynogenesis, (meiotic) hybridogenesis nnd sexual reproduction. In teleosts, parthenogenetic reproduction is strictly dependent on sperm to initate embryonic development. As opposed to true parthenogenesis, sperm-dependent parthenogenetic teleost lineages must primarily coexist with their "sperm donor", usually males from a parental sexual lineage or from a related sexual species. In some systems, gynogens were able to escape from their initial sperm donors ("host switch") and therefore, to enlarge their ranges and ecological niches. Sperm donors normally do not contribue genetically to the next generation. However, paternal leakage is observed in many systems contributing differing amounts of genetic material (from microchromosomes to entire chromosome sets) allowing interaction between genomes of different origin. Hybridogenesis is similar to gynogenesis in depending upon coexisence with sexual species but incorporates recombined genetic material by true fertilizazion. While hybridogens usually form clonal gametes, some triploids are capable of genome elimination followed by a normal diploid meiosis. Sperm-dependent parthenogenesis and hybridogenesis combine disadvantages and advantages from both sexuality and asexuality. Here, we give an overview of sperm-dependent breeding complexes in fishes, discuss the evolutionary consequences of paternal leakage, and speculate about the evolutionary significance of intergenomic (re)combination.
Open Access
Yes
Create date
31/10/2009 10:47
Last modification date
20/08/2019 13:58
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