Evolutionary History of the Marchantia polymorpha Complex

Frontiers in Plant Science
Anna-Malin LindeUlf Lagercrantz

Abstract

The potential role of introgression in evolution has gained increased interest in recent years. Although some fascinating examples have been reported, more information is needed to generalize the importance of hybridization and introgression for adaptive divergence. As limited data exist on haploid dominant species, we analyzed genomes of three subspecies of the liverwort Marchantia polymorpha. We used available genomic data for subsp. ruderalis and carried out whole-genome (PacBio) sequencing for one individual each of subsp. montivagans and subsp. polymorpha as well as Illumina resequencing of additional genomes for all three subspecies. The three subspecies were compared against M. paleacea as outgroup. Our analyses revealed separation of the three taxa, but all three possible topologies were richly represented across the genomes, and the underlying divergence order less obvious. This uncertainty could be the result of the divergence of the three subspecies close in time, or that introgression has been frequent since divergence. In particular, we found that pseudo-chromosome 2 in subsp. montivagans was much more diverged than other parts of the genomes. This could either be explained by specific capture of chromosome 2 from ...Continue Reading

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Methods Mentioned

BETA
electrophoresis

Software Mentioned

BCFtools
HALtools
MicroSyntenyPlot
protein2genome Maker
SPAdes
Loter
R package “
BBDuk
R package
MafFilter

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