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A syntelog-based pan-genome provides insights into rice domestication and de-domestication
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A syntelog-based pan-genome provides insights into rice domestication and de-domestication
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Journal Article
A syntelog-based pan-genome provides insights into rice domestication and de-domestication
2023
Overview
Background
Asian rice is one of the world’s most widely cultivated crops. Large-scale resequencing analyses have been undertaken to explore the domestication and de-domestication genomic history of Asian rice, but the evolution of rice is still under debate.
Results
Here, we construct a syntelog-based rice pan-genome by integrating and merging 74 high-accuracy genomes based on long-read sequencing, encompassing all ecotypes and taxa of
Oryza sativa
and
Oryza rufipogon
. Analyses of syntelog groups illustrate subspecies divergence in gene presence-and-absence and haplotype composition and identify massive genomic regions putatively introgressed from ancient Geng/
japonica
to ancient Xian/
indica
or its wild ancestor, including almost all well-known domestication genes and a 4.5-Mbp centromere-spanning block, supporting a single domestication event in main rice subspecies. Genomic comparisons between weedy and cultivated rice highlight the contribution from wild introgression to the emergence of de-domestication syndromes in weedy rice.
Conclusions
This work highlights the significance of inter-taxa introgression in shaping diversification and divergence in rice evolution and provides an exploratory attempt by utilizing the advantages of pan-genomes in evolutionary studies.
Publisher
BioMed Central,Springer Nature B.V,BMC
Subject
