A fourth subgenome of the Camelina genus reveals gene dominance is influenced by chromosomal proximity
Raju Chaudhary, Kevin C Koh, Peng Gao, Sampath Perumal, Erin E Higgins, Kyla Horner, Stephen J Robinson, Zhengping Wang, Christina Eynck, Venkat Bandi, Andrew G Sharpe, Isobel A P Parkin · 2026
Read A fourth subgenome of the Camelina genus reveals gene dominance is influenced by chromosomal proximity by Raju Chaudhary, Kevin C Koh, Peng Gao, Sampath Perumal, Erin E Higgins, Kyla Horner, Stephen J Robinson, Zhengping Wang, Christina Eynck, Venkat Bandi, Andrew G Sharpe, Isobel A P Parkin (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13448894.txt.
Description
Raju Chaudhary and co-authors report in 2026 new genome assemblies for Camelina, an oilseed genus whose species carry unlike numbers of chromosome sets. Next to a better standard for the crop Camelina sativa, they built three forms of its wild relative Camelina microcarpa, one with four sets and two distinct forms with six. Matching the sets against each other revealed a fourth subgenome in the genus, found in one six-set form and marked by many unique chromosome reshuffles.
In that newly formed species, the second subgenome's genes lead expression, against what the standard two-step model of related crops predicts. That lead weakened as the physical closeness between subgenomes in the nucleus, gauged by chromatin contact rate, grew. The authors propose that nuclear proximity itself shapes which parental genome leads, adding a spatial driver to plant genome evolution and a resource for breeding a low-variety crop.
Catalog record
| CREATOR | Raju Chaudhary, Kevin C Koh, Peng Gao, Sampath Perumal, Erin E Higgins, Kyla Horner, Stephen J Robinson, Zhengping Wang, Christina Eynck, Venkat Bandi, Andrew G Sharpe, Isobel A P Parkin |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 61866 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |