Advanced search

Biology, Research

Clonal polymorphism and high heterozygosity in the celibate genome of the Amazon molly

Published on : February 19, 2018

The extreme rarity of asexual vertebrates in nature is generally explained by genomic decay due to absence of meiotic recombination, thus leading to extinction of such lineages.

Cover suggestion 4927.png
Researchers explore features of a vertebrate asexual genome, the Amazon molly, Poecilia formosa, and find few signs of genetic degeneration but unique genetic variability and ongoing evolution. They uncovered a substantial clonal polymorphism and, as a conserved feature from its interspecific hybrid origin, a 10-fold higher heterozygosity than in the sexual parental species. These characteristics seem to be a principal reason for the unpredicted fitness of this asexual vertebrate. Their data suggest that asexual vertebrate lineages are scarce not because they are at a disadvantage, but because the genomic combinations required to bypass meiosis and to make up a functioning hybrid genome are rarely met in nature.

Contacts


Jean Nicolas Volff (IGFL)
Mail : jean-nicolas.volff@ens-lyon.fr

Domitille Chalopin
(LBMC)
Mail : domitille.chalopin@ens-lyon.fr

Search of an article

Search of an article

Contact

ENS de Lyon
15 parvis René Descartes - BP 7000
69342 Lyon Cedex 07 - FRANCE
Descartes Campus : +33 (0) 4 37 37 60 00
Monod Campus : +33 (0) 4 72 72 80 00

Contact us

Stay connected