Sicard, Adrien
- Department of Plant Biology, Swedish University of Agricultural Sciences
Research article2023Peer reviewedOpen access
Duan, Tianlin; Sicard, Adrien; Glemin, Sylvain; Lascoux, Martin
Polyploidization, the process leading to the increase in chromosome sets, is a major evolutionary transition in plants. Whole-genome duplication (WGD) within the same species gives rise to autopolyploids, whereas allopolyploids result from a compound process with two distinct components: WGD and interspecific hybridization. To dissect the instant effects of WGD and hybridization on gene expression and phenotype, we created a series of synthetic hybrid and polyploid Capsella plants, including diploid hybrids, autotetraploids of both parental species, and two kinds of resynthesized allotetraploids with different orders of WGD and hybridization. Hybridization played a major role in shaping the relative expression pattern of the neo-allopolyploids, whereas WGD had almost no immediate effect on relative gene expression pattern but, nonetheless, still affected phenotypes. No transposable element-mediated genomic shock scenario was observed in either neo-hybrids or neo-polyploids. Finally, WGD and hybridization interacted and the distorting effects of WGD were less strong in hybrids. Whole-genome duplication may even improve hybrid fertility. In summary, while the initial relative gene expression pattern in neo-allotetraploids was almost entirely determined by hybridization, WGD only had trivial effects on relative expression patterns, both processes interacted and had a strong impact on physical attributes and meiotic behaviors.
Capsella bursa-pastoris; gene expression; hybridization; neopolyploid lines; polyploidy
New Phytologist
2023, Volume: 237, number: 1, pages: 339-353 Publisher: WILEY
Agricultural Science
DOI: https://doi.org/10.1111/nph.18542
https://res.slu.se/id/publ/119954