A pangenome reveals LTR repeat dynamics as a major driver of genome evolution in Chenopodium

Jaggi K.E., Krak K., Štorchová H., Mandák B., Marcheschi A., Belyayev A., Jellen E.N., Sproul J., Jarvis D., Maughan P.J.
PLANT GENOME 18: e70010, 2025

Keywords: Chenopodium pangenome, LTR, genome evolution
Abstract: The genus Chenopodium consists of about 150 plant species found worldwide which are known for their climate adaptability and use as regionally important food crops, like quinoa. In this study, we analyzed the genomes of 12 Chenopodium species to better understand what forces shaped their evolution. We showed that species differ in genome sizes and in their number of unique gene families, some of which could help improve crops by adding traits such as disease resistance. The study also looked at how the expansion of repetitive DNA sequences and structural changes in the DNA could have led to new species. The findings are important for crop improvement, especially for plants like quinoa, while also providing valuable insights into the diversity of the genus. This work helps scientists understand how these plants evolved and how they can be used to develop better crops.
DOI: 10.1002/tpg2.70010 IEB authors: Helena Štorchová