Lateral gene transfer generates accessory genes that accumulate at different rates within a grass lineage

Lateral gene transfer generates accessory genes that accumulate at different rates within a grass lineage

© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 240(2023), 5 vom: 04. Dez., Seite 2072-2084
1. Verfasser: Raimondeau, Pauline (VerfasserIn)
Weitere Verfasser: Bianconi, Matheus E, Pereira, Lara, Parisod, Christian, Christin, Pascal-Antoine, Dunning, Luke T
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Poaceae adaptation evolution horizontal gene transfer phylogenomics
Beschreibung
Zusammenfassung:© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.
Lateral gene transfer (LGT) is the movement of DNA between organisms without sexual reproduction. The acquired genes represent genetic novelties that have independently evolved in the donor's genome. Phylogenetic methods have shown that LGT is widespread across the entire grass family, although we know little about the underlying dynamics. We identify laterally acquired genes in five de novo reference genomes from the same grass genus (four Alloteropsis semialata and one Alloteropsis angusta). Using additional resequencing data for a further 40 Alloteropsis individuals, we place the acquisition of each gene onto a phylogeny using stochastic character mapping, and then infer rates of gains and losses. We detect 168 laterally acquired genes in the five reference genomes (32-100 per genome). Exponential decay models indicate that the rate of LGT acquisitions (6-28 per Ma) and subsequent losses (11-24% per Ma) varied significantly among lineages. Laterally acquired genes were lost at a higher rate than vertically inherited loci (0.02-0.8% per Ma). This high turnover creates intraspecific gene content variation, with a preponderance of them occurring as accessory genes in the Alloteropsis pangenome. This rapid turnover generates standing variation that can ultimately fuel local adaptation
Beschreibung:Date Completed 03.11.2023
Date Revised 03.11.2023
published: Print-Electronic
RefSeq: PRJNA824797
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.19272