Rapid large-scale genomic introgression in Arabidopsis suecica via an autoallohexaploid bridge

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F23%3A00575732" target="_blank" >RIV/61389030:_____/23:00575732 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1093/genetics/iyac132" target="_blank" >https://doi.org/10.1093/genetics/iyac132</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/genetics/iyac132" target="_blank" >10.1093/genetics/iyac132</a>

Result language

angličtina

Original language name

Rapid large-scale genomic introgression in Arabidopsis suecica via an autoallohexaploid bridge

Original language description

Gene flow between species in the genus Arabidopsis occurs in significant amounts, but how exactly gene flow is achieved is not well understood. Polyploidization may be one avenue to explain gene flow between species. One problem, however, with polyploidization as a satisfying explanation is the occurrence of lethal genomic instabilities in neopolyploids as a result of genomic exchange, erratic meiotic behavior, and genomic shock. We have created an autoallohexaploid by pollinating naturally co-occurring diploid Arabidopsis thaliana with allotetraploid Arabidopsis suecica (an allotetraploid composed of A.Thaliana and Arabidopsis arenosa). Its triploid offspring underwent spontaneous genome duplication and was used to generate a multigenerational pedigree. Using genome resequencing, we show that 2 major mechanisms promote stable genomic exchange in this population. Legitimate meiotic recombination and chromosome segregation between the autopolyploid chromosomes of the 2 A.Thaliana genomes occur without any obvious bias for the parental origin and combine the A.Thaliana haplotypes from the A.Thaliana parent with the A.Thaliana haplotypes from A. suecica similar to purely autopolyploid plants. In addition, we repeatedly observed that occasional exchanges between regions of the homoeologous chromosomes are tolerated. The combination of these mechanisms may result in gene flow leading to stable introgression in natural populations. Unlike the previously reported resynthesized neoallotetraploid A. suecica, this population of autoallohexaploids contains mostly vigorous, and genetically, cytotypically, and phenotypically variable individuals. We propose that naturally formed autoallohexaploid populations might serve as an intermediate bridge between diploid and polyploid species, which can facilitate gene flow rapidly and efficiently.

Czech name

—

Czech description

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Type

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

CEP classification

—

OECD FORD branch

10603 - Genetics and heredity (medical genetics to be 3)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Genetics

ISSN

0016-6731

e-ISSN

1943-2631

Volume of the periodical

223

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

iyac132

UT code for WoS article

000859332000001

EID of the result in the Scopus database

2-s2.0-85148376924