Apr 14, 2020

Genus-wide comparison reveals divergence and evolution of the four sections within the genus Claviceps are the result of varying mechanisms driving genome evolution and host range

BioRxiv : the Preprint Server for Biology
S. A. WykaKirk D Broders

Abstract

The genus Claviceps has been known for centuries as an economically important fungal genera for pharmacology and agricultural research. Despite this little is known about its evolution. Only recently have researchers begun to unravel the evolutionary history of the genus, with origins in South America and classification of four distinct sections through ecological, morphological, and metabolic features (Claviceps sects. Citrinae, Paspalorum, Pusillae, and Claviceps). The first three sections are additionally characterized by narrow host range, while sect. Claviceps is considered evolutionarily more successful and adaptable as it has the largest host range and biogeographical distribution. However, the reasons for this success and adaptability remain unclear. Our study elucidates these factors by sequencing and annotating 50 Claviceps genomes, representing 21 species, for a comprehensive comparison of genome architecture and plasticity in relation to host range potential. Our results show the trajectory from specialized one-speed genomes (C. sects. Citrinae and Paspalorum) to adaptive two-speed genomes (C. sects. Pusillae and Claviceps) through co-localization of TEs around predicted effectors and loss of RIP resulting in uncons...Continue Reading

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Mentioned in this Paper

Heart
Zaglossus bruijni
Graph Layout
Transcriptome
Transcript
GPER protein, human
Gene Duplication
RNA
Alternative Splicing
Molecular Assembly/Self Assembly

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