Overcoming Ploidy Barriers: The Role of Triploid Bridges in the Genetic Introgression of Cardamine amara
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F25%3A00618584" target="_blank" >RIV/67985939:_____/25:00618584 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14740/25:00141403 RIV/00216208:11310/25:10507986
Result on the web
<a href="https://doi.org/10.1111/mec.17702" target="_blank" >https://doi.org/10.1111/mec.17702</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/mec.17702" target="_blank" >10.1111/mec.17702</a>
Alternative languages
Result language
angličtina
Original language name
Overcoming Ploidy Barriers: The Role of Triploid Bridges in the Genetic Introgression of Cardamine amara
Original language description
Polyploidisation is a significant reproductive barrier, yet genetic evidence indicates that interploidy admixture is more common than previously thought. Theoretical models and controlled crosses support the 'triploid bridge' hypothesis, proposing that hybrids of intermediate ploidy facilitate gene flow. However, comprehensive evidence combining experimental and genetic data from natural mixed-ploidy species is missing. Here, we investigated the rates and directionality of gene flow within a diploid-autotetraploid contact zone of Cardamine amara, a species with abundant natural triploids. We cytotyped over 400 individuals in the field, conducted reciprocal interploidy crosses, and inferred gene flow based on genome-wide sequencing of 84 individuals. Triploids represent a conspicuous entity in mixed-ploidy populations (5%), yet only part of them arose through interploidy hybridisation. Despite being rarely formed, triploid hybrids can backcross with their parental cytotypes, producing viable offspring that are often euploid (in 42% of cases). In correspondence, D-statistics and coalescent simulations documented a significant genome-wide signal of bidirectional gene flow in sympatric but not allopatric populations. Triploids, though rare, thus seem to play a key role in overcoming polyploidy-related reproductive barriers in C. amara. In sum, we present integrative evidence for interploidy gene flow mediated by a triploid bridge in natural populations.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Molecular Ecology
ISSN
0962-1083
e-ISSN
1365-294X
Volume of the periodical
34
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
e17702
UT code for WoS article
001430268800001
EID of the result in the Scopus database
2-s2.0-105001077378