Natural hybridization in freshwater animals Ecological implications and molecular approaches

Streit, Bruno; Städler, Thomas; Schwenk, Klaus; Ender, Andrea; Kuhn, Kerstin; Schierwater, Bernd

doi:10.1007/bf01138462

Cited by 10 publications

(7 citation statements)

References 70 publications

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“…[Ferris and Whitt, 1979;Chenuil et al, 1999;Tsigenopoulos et al, 2002]; and freshwater tetraploid snails Bulinus truncatus . However, further analyses are necessary to make robust conclusions [Streit et al, 1994].…”

Section: Spontaneous Allopolyploid Originmentioning

confidence: 99%

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Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential

Choleva

Janko

2013

Cytogenet Genome Res

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The past decade has witnessed a tremendous increase in interest in polyploidy, which may partly be related to the development of new powerful genetic and genomic tools. These have provided numerous insights into mainly genetic and genomic consequences of polyploidy, dramatically improving our understanding of the dynamics of the polyploidization process and its importance as a mechanism in animal evolution. In contrast, several other aspects of polyploidization, such as physiology, ecology and development, have received considerably less attention. Our aim is not to make an exhaustive review of current knowledge about animal polyploidy, but rather to thoroughly elaborate on some very fundamental questions which still remain open or even neglected. In particular, we show that properties of new polyploid lineages largely depend upon the proximate way in which they arose, but the evolutionary pathways to polyploidy are often unresolved. To help researchers orientate amongst the number of pathways to polyploidy, we provide an extensive review of particular scenarios proposed in distinct animal taxa. We discuss how polyploidy relates to hybridization, particularly with respect to asexuality, and elaborate on whether clonal triploids may help to overcome the constraints of aneuploidy, thereby serving as a triploid bridge towards the establishment of new polyploid species. We further show that in most animal asexual complexes clonal lineages may become established only under one ploidy level (usually either di- or triploidy), and that it is rather rare to see the coexistence of successful clones of different ploidies. We discuss why the rate of polyploidization is higher in some taxa than in others, and what tools we have to evaluate the rate of polyploidization. Finally, we review some of the immediate physiological and developmental effects of polyploidy which are related to the genome size/cell size relation and show how studies of polyploidy may enhance the study of macroecology and developmental biology. See also the sister article focusing on plants by Weiss-Schneeweiss et al. in this themed issue.

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Section: Spontaneous Allopolyploid Originmentioning

confidence: 99%

“…Transition from Non-Hybrid Diploidy to Allotetraploidy Streit et al [1994] discussed the possibility of a union of unreduced gametes from 2 diploid species (AA and BB) that could directly produce an allotetraploid AABB without an intermediate triploid bridge ( fig. 2 D).…”

Section: Spontaneous Allopolyploid Originmentioning

confidence: 99%

Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential

Choleva

Janko

2013

Cytogenet Genome Res

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“…Differences in mitochondrial DNA sequences between hybrids and the maternal species are so small that relatively recent hybridization events should be assumed (Schwenk, 1993). Moreover, Schierwater et al (1994), using RAPD markers, showed that D. galeata x hyalina hybrid individuals possess a greater proportion of nuclear markers from D. hyalina than from D. galeata. Also, recent work on the North American Daphnia galeata rnendotae-Daphnia rosea hybrid complex (Taylor & Hebert, 1993) has revealed that in this hybrid complex backcrossing and introgression occur.…”

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confidence: 99%

Temporal changes in the genetic structure of the Daphnia species complex in Tjeukemeer, with evidence for backcrossing

Spaak

1996

Heredity

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“…When used in phylogenetic analyses, the combination of these two genes with different evolutionary rates serves to identify fish at the species level ( 5 ). Moreover, the given independent variation rate for each gene has allowed the identification of basal phylogenetic relationships and identify any rare case of paraphyly or hybridization between close species ( 6 ).…”

Section: Dna Sequencesmentioning

confidence: 99%

FishTrace: a genetic catalogue of European fishes

Zanzi

Martinsohn

2017

Database

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FishTrace is a genetic catalogue for species identification associated to reference collections of taxonomically identified vouchers from more than 200 commercial marine fish species. The main purpose of the genetic catalogue is to enable reliable species identification for research purposes as well as in support of traceability schemes under the remit of food and feed laws. A major asset of FishTrace is that all genetic data are linked to biological collections of vouchers, that is the fish specimen that have been identified genetically have, at the same time, been identified by taxonomists and are stored and curated by natural history museums. This opens the potential for future applications related to fish species authenticity tests, also in a legal context, and associated biological research. The genetic catalogue, which contains molecular data together with detailed information on sampling and geographical origin, is publically accessible on the web site of the project.Database URL https://fishtrace.jrc.ec.europa.eu

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Natural hybridization in freshwater animals Ecological implications and molecular approaches

Cited by 10 publications

References 70 publications

Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential

Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential

Temporal changes in the genetic structure of the Daphnia species complex in Tjeukemeer, with evidence for backcrossing

FishTrace: a genetic catalogue of European fishes

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