A High-Quality Haplotype-Resolved Genome of Common Bermudagrass ( Cynodon dactylon L.) Provides Insights Into Polyploid Genome Stability and Prostrate Growth

Common bermudagrass ( L.) is an important perennial warm-season turfgrass species with great economic value. However, the reference genome is still deficient in , which severely impedes basic studies and breeding studies. In this study, a high-quality haplotype-resolved genome of cultivar Yangjiang...

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Published in:Frontiers in plant science 2022-04, Vol.13, p.890980-890980
Main Authors: Zhang, Bing, Chen, Si, Liu, Jianxiu, Yan, Yong-Bin, Chen, Jingbo, Li, Dandan, Liu, Jin-Yuan
Format: Article
Language:English
Subjects:
common bermudagrass
Cynodon dactylon
genome
haplotype
Plant Science
tiller angle
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Summary:Common bermudagrass ( L.) is an important perennial warm-season turfgrass species with great economic value. However, the reference genome is still deficient in , which severely impedes basic studies and breeding studies. In this study, a high-quality haplotype-resolved genome of cultivar Yangjiang was successfully assembled using a combination of multiple sequencing strategies. The assembled genome is approximately 1.01 Gb in size and is comprised of 36 pseudo chromosomes belonging to four haplotypes. In total, 76,879 protein-coding genes and 529,092 repeat sequences were annotated in the assembled genome. Evolution analysis indicated that underwent two rounds of whole-genome duplication events, whereas syntenic and transcriptome analysis revealed that global subgenome dominance was absent among the four haplotypes. Genome-wide gene family analyses further indicated that homologous recombination-regulating genes and tiller-angle-regulating genes all showed an adaptive evolution in , providing insights into genome-scale regulation of polyploid genome stability and prostrate growth. These results not only facilitate a better understanding of the complex genome composition and unique plant architectural characteristics of common bermudagrass, but also offer a valuable resource for comparative genome analyses of turfgrasses and other plant species.
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.890980