Synthesis of Clonality and Polyploidy in Vertebrate Animals by Hybridization Between Two Sexual Species

Choleva, Lukáš; Janko, Karel; Gelas, Koen De; Bohlen, Jörg; Šlechtová, Vendula; Rábová, M.; Ráb, Petr

doi:10.1111/j.1558-5646.2012.01589.x

Cited by 95 publications

(167 citation statements)

References 81 publications

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“…The presented results using gonad histology confirmed excellent previous data by Choleva et al (2012) which showed that among diploid hybrids of C. elongatoides and C. taenia only the females were fertile and produced unreduced non-recombinant eggs, whereas males were infertile and paternal leakage of subgenomic amounts was not observed. Moreover, diploid hybrid females implemented the path of ''stable diploid'' and produced a rather small fraction of polyploid progeny .…”

Section: Discussionsupporting

confidence: 79%

“…The latter crossing attained the only stage of gastrula. In contrast, such backcrosses were successful in experiments described by Choleva et al (2012). This can have many causes, for example, differences between the two methodological approaches.…”

Section: Discussionmentioning

confidence: 58%

“…This can have many causes, for example, differences between the two methodological approaches. Natural spawning (without stimulation by hormones) conducted by Choleva et al (2012) took place in an aquarium, whereas in the current study, fertilization was done in Petri dishes and the developing eggs were then transferred to a small aquarium.…”

Section: Discussionmentioning

confidence: 99%

“…At the same time, Choleva et al (2012) described the data of many crossing experiments to explain the role of hybridization and polyploidization during a process by which sexual reproduction reverses into clonality in spined loaches (Cobitis) to test the reproductive potential of reciprocal diploid hybrids of C. taenia and C. elongatoides. The current study also used a similar experiment design (but different in details) to understand and compare the early development of these reproductive pathways.…”

Section: Introductionmentioning

confidence: 99%

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Histological evidence that diploid hybrids of Cobitis taenia and C. elongatoides (Teleostei, Cobitidae) develop into fertile females and sterile males

Juchno

Boroń

2018

Hydrobiologia

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In Europe, two bisexual fish species, Cobitis taenia (TT) and Cobitis elongatoides (EE), hybridized, producing diploid and polyploid clonal lineages. This study compared, for the first time, embryonic development, hatching success, sex ratio, body size and as well as reproductive ability based on the gonad histology of F1 reciprocal diploid hybrids (TE, ET) of both species. Hybrid F1 progeny showed the same proper pattern of embryonic and larval development. Among TE and ET offspring, slightly more females and males, respectively, occurred, but sex parity among 18-month-old hybrids was observed. Two-and three-year-old F1 hybrid females were mature, possessing all stages of oogenesis in their ovaries. Females (TE) back-crossed with C. taenia males had properly developing progeny. In testes of two-and three-year-old F1 hybrids, only early stages of spermatogenesis and pyknotic cells indicating the degeneration process were observed, but they exhibited an external feature (lamina circularis) of maturation. The results were confirmed by the structure of gonads that two sexual species, C. taenia and C. elongatoides, hybridize, producing F1 progeny of sterile males and fertile females. Hybrid females may participate in subsequent steps of speciation via hybridization and polyploidy or, on the contrary, represent an element of new species isolation.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Histological evidence that diploid hybrids of Cobitis taenia and C. elongatoides (Teleostei, Cobitidae) develop into fertile females and sterile males

Juchno

Boroń

2018

Hydrobiologia

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“…Such molecular markers have also been used to reveal several details regarding the cytogenetic pathways by which various diploid and polyploid unisexual biotypes originated (39)(40)(41)(42)(43). For example, for any triploid parthenogen, the formational hybridization event might in theory either have preceded or followed the production of an unreduced egg by a diploid female.…”

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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Hybridogenesis in Water Frogs

Dufresnes

Mazepa

2020

Encyclopedia of Life Sciences

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Several water frogs from the genus Pelophylax have a hybrid origin and perpetuate by hybridogenesis, a peculiar mode of reproduction ruled by complex phenomena such as clonality and polyploidy, and which can constitute a transient stage towards the formation of novel species. Different kinds of hybridogenetic complexes have been documented throughout Europe, and a tremendous diversity of breeding systems allows their maintenance in space and time, each with its own subtilities to bypass the numerous challenges posed by a semi‐sexual life cycle. The other side of the coin is that hybridogenesis can boost the invasive potential of introduced frogs by altering the fragile dynamics of these natural populations, hence illustrating the thin line that separates ephemeral hybrid forms versus perennial reticulate taxa. Key Concepts Hybrids between diverged species can avoid sterility by abandoning sexual reproduction. Hybridogenetic hybrids typically transmit a single, clonal genome to offspring. Clonality promotes genetic decay and the need to breed with a sexual species. Reliance on a sexual host can be bypassed by polyploidy. Clonal genomes have various opportunities to recombine in populations. Genetic integrity, ecomorphological differentiation and sexual independence of hybridogenetic hybrids may represent steps towards hybrid speciation. Hybridogenetic systems can collapse due to invasive parental species.

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Synthesis of Clonality and Polyploidy in Vertebrate Animals by Hybridization Between Two Sexual Species

Cited by 95 publications

References 81 publications

Histological evidence that diploid hybrids of Cobitis taenia and C. elongatoides (Teleostei, Cobitidae) develop into fertile females and sterile males

Histological evidence that diploid hybrids of Cobitis taenia and C. elongatoides (Teleostei, Cobitidae) develop into fertile females and sterile males

Evolutionary perspectives on clonal reproduction in vertebrate animals

Hybridogenesis in Water Frogs

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