Polyploidization as an opportunistic mutation: The role of unreduced gametes formation and genetic drift in polyploid establishment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F22%3A00559819" target="_blank" >RIV/67985939:_____/22:00559819 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/22:10456566

Result on the web

<a href="https://doi.org/10.1111/jeb.14055" target="_blank" >https://doi.org/10.1111/jeb.14055</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jeb.14055" target="_blank" >10.1111/jeb.14055</a>

Result language

angličtina

Original language name

Polyploidization as an opportunistic mutation: The role of unreduced gametes formation and genetic drift in polyploid establishment

Original language description

It is broadly assumed that polyploidy success reflects an increase in fitness associated with whole-genome duplication (WGD), due to higher tolerance to stressful conditions. Nevertheless, WGD also arises with several costs in neo-polyploid lineages, like genomic instability, or cellular mis-management. In addition to these costs, neo-polyploid individuals also face frequency dependent selection because of frequent low-fitness triploids formed by cross-ploidy pollinations when tetraploids are primarily rare in the population. Interestingly, the idea that polyploidy can be fixed by genetic drift as a neutral or deleterious mutation is currently underexplored in the literature. To test how and when polyploidy can fix in a population by chance, we built a theoretical model in which autopolyploidization occurs through the production of unreduced gametes, a trait modelled as a quantitative trait that is allowed to vary through time. We found that when tetraploid individuals are less or as fit as their diploid progenitors, fixation of polyploidy is only possible when genetic drift is stronger than natural selection. The necessity of drift for tetraploid fixation holds even when polyploidy confers a selective advantage, except for scenarios where tetraploids are much fitter than diploids. Finally, we found that self-fertilization is less beneficial for tetraploid establishment than previously thought, notably when polyploids harbour an initial decrease in fitness. Our results bring a novel, non-exclusive explanation for the unequal temporal and spatial distribution of polyploid species.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GA20-22783S" target="_blank" >GA20-22783S: Genome duplication as an imperfect barrier in speciation? Evolutionary drivers and consequences of inter-ploidy introgression in natural populations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Evolutionary Biology

ISSN

1010-061X

e-ISSN

1420-9101

Volume of the periodical

35

Issue of the periodical within the volume

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

1099-1109

UT code for WoS article

000818868300001

EID of the result in the Scopus database

2-s2.0-85133083071