A tetraploid Amazon molly, Poecilia formosa

The Journal of Heredity
Kathrin P LampertManfred Schartl

Abstract

Polyploidization is thought to be an important driving force in evolution as it increases the genetic material on which mutation and selection can act. In the Amazon molly, Poecilia formosa, triploid genotypes can be found in the field and frequently arise from diploid breeding stocks, a tetraploid individual, however, was so far never documented. Here, we report the first tetraploid Amazon molly. Flow cytometry clearly showed the tetraploid DNA content, whereas microsatellite analysis not only confirmed the tetraploidy but also pointed to allotetraploidy. Most likely the fourth genome was received through paternal leakage, namely, by fertilization of a triploid egg with a haploid sperm. The existence of tetraploid individuals offers new explanations for the enormous clonal diversity observed in wild populations of P. formosa.

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Citations

Feb 13, 2013·Trends in Ecology & Evolution·Jussi LehtonenHanna Kokko
May 30, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·K P Lampert, M Schartl
Jun 2, 2009·Genome Génome / Conseil National De Recherches Canada·Eric BonnivardDominique Higuet
Oct 26, 2011·Evolution; International Journal of Organic Evolution·Maurine NeimanGery Hehman
Oct 11, 2017·Frontiers in Genetics·Pedro L P XavierGeorge S Yasui
Jun 9, 2020·Cryobiology·George Shigueki YasuiJosé Augusto Senhorini

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