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Genome of the tropical plant Marchantia inflexa: implications for sex chromosome evolution and dehydration tolerance
- Source :
- Scientific Reports, Scientific Reports, Vol 9, Iss 1, Pp 1-13 (2019)
- Publication Year :
- 2019
- Publisher :
- Nature Publishing Group UK, 2019.
-
Abstract
- We present a draft genome assembly for the tropical liverwort, Marchantia inflexa, which adds to a growing body of genomic resources for bryophytes and provides an important perspective on the evolution and diversification of land plants. We specifically address questions related to sex chromosome evolution, sexual dimorphisms, and the genomic underpinnings of dehydration tolerance. This assembly leveraged the recently published genome of related liverwort, M. polymorpha, to improve scaffolding and annotation, aid in the identification of sex-linked sequences, and quantify patterns of sequence differentiation within Marchantia. We find that genes on sex chromosomes are under greater diversifying selection than autosomal and organellar genes. Interestingly, this is driven primarily by divergence of male-specific genes, while divergence of other sex-linked genes is similar to autosomal genes. Through analysis of sex-specific read coverage, we identify and validate genetic sex markers for M. inflexa, which will enable diagnosis of sex for non-reproductive individuals. To investigate dehydration tolerance, we capitalized on a difference between genetic lines, which allowed us to identify multiple dehydration associated genes two of which were sex-linked, suggesting that dehydration tolerance may be impacted by sex-specific genes.
- Subjects :
- 0301 basic medicine
Plant genetics
lcsh:Medicine
Sequence assembly
Genomics
Genome
Article
Chromosomes, Plant
Evolution, Molecular
03 medical and health sciences
Plant evolution
0302 clinical medicine
Marchantia
lcsh:Science
Gene
Disease Resistance
Multidisciplinary
biology
Dehydration
lcsh:R
Chromosome
biology.organism_classification
030104 developmental biology
Evolutionary biology
lcsh:Q
030217 neurology & neurosurgery
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....8351184d706bfbb264f3610bed3076d8