Histocompatibility analysis of clonal diversity in unisexual hybrids of the killifishes &lt;i&gt;Fundulus heteroclitus&lt;/i&gt; and &lt;i&gt;Fundulus diaphanus&lt;/i&gt;

Dawley, Robert M.; Yeakel, Amy M.; Beaulieu, Keith A.; Phiel, Kristen L.

doi:10.1139/cjz-78-6-923

Cited by 13 publications

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Sperm-Dependent Parthenogenesis and Hybridogenesis in Teleost Fishes

2009

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In so-called unisexual teleost fishes, a broad spectrum of evolutionary 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 followed by meiosis (meiotic hybridogenesis). All of these phenomena are of 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 and sexual reproduction. In teleosts, parthenogenetic reproduction is strictly dependent on sperm to initiate 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 contribute 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 coexistence with sexual species but incorporates recombined genetic material by true fertilization. While hybridogens usually form clonal gametes, some triploids are capable of genome elimination followed by a normal diploid meiosis. Sperm-dependent parthenogenesis and hybridogenesis

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Sperm-Dependent Parthenogenesis and Hybridogenesis in Teleost Fishes

2009

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Clonality

Avise¹

2008

175

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About 99.9% of vertebrate species reproduce sexually. This makes the exceptional 0.1%—the asexual or clonal reproducers—fascinating in their own right, and also uniquely instructive about the biological significance of alternative reproductive modes. This book describes the genetics, ecology, natural history, and evolution of all of the world's approximately 100 “species” of vertebrate animal that routinely display one form or another of clonal or quasi-clonal reproduction. The book investigates the astounding realm of sexual abstinence, from the levels of DNA molecules and somatic cells to whole animals and natural populations. Also described is how scientists have learned to mimic and extend nature's own clonal processes by engineering perfect copies of genes, genomes, and whole animals in the laboratory. By considering the many facets of sexual abstinence and clonal reproduction in vertebrate animals, new light is also shed on the biological meaning and ramifications of standard sexuality.

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2008

Clonality

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Histocompatibility analysis of clonal diversity in unisexual hybrids of the killifishes <i>Fundulus heteroclitus</i> and <i>Fundulus diaphanus</i>

Cited by 13 publications

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Sperm-Dependent Parthenogenesis and Hybridogenesis in Teleost Fishes

Sperm-Dependent Parthenogenesis and Hybridogenesis in Teleost Fishes

Clonality

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