Details

Autor(en) / Beteiligte

• Gordon, Sean P
• Contreras-Moreira, Bruno
• Levy, Joshua J
• Djamei, Armin
• Czedik-Eysenberg, Angelika
• Tartaglio, Virginia S
• Session, Adam
• Martin, Joel
• Cartwright, Amy
• Katz, Andrew
• Singan, Vasanth R
• Goltsman, Eugene
• Barry, Kerrie
• Dinh-Thi, Vinh Ha
• Chalhoub, Boulos
• Diaz-Perez, Antonio
• Sancho, Ruben
• Lusinska, Joanna
• Wolny, Elzbieta
• Nibau, Candida
• Doonan, John H
• Mur, Luis A J
• Plott, Chris
• Jenkins, Jerry
• Hazen, Samuel P
• Lee, Scott J
• Shu, Shengqiang
• Goodstein, David
• Rokhsar, Daniel
• Schmutz, Jeremy
• Hasterok, Robert
• Catalan, Pilar
• Vogel, John P

Titel

Gradual polyploid genome evolution revealed by pan-genomic analysis of Brachypodium hybridum and its diploid progenitors

Ist Teil von

• Nature communications, 2020-07, Vol.11 (1), p.3670-3670, Article 3670

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2020

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Our understanding of polyploid genome evolution is constrained because we cannot know the exact founders of a particular polyploid. To differentiate between founder effects and post polyploidization evolution, we use a pan-genomic approach to study the allotetraploid Brachypodium hybridum and its diploid progenitors. Comparative analysis suggests that most B. hybridum whole gene presence/absence variation is part of the standing variation in its diploid progenitors. Analysis of nuclear single nucleotide variants, plastomes and k-mers associated with retrotransposons reveals two independent origins for B. hybridum, ~1.4 and ~0.14 million years ago. Examination of gene expression in the younger B. hybridum lineage reveals no bias in overall subgenome expression. Our results are consistent with a gradual accumulation of genomic changes after polyploidization and a lack of subgenome expression dominance. Significantly, if we did not use a pan-genomic approach, we would grossly overestimate the number of genomic changes attributable to post polyploidization evolution.