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- W4376223815 abstract "Abstract Background The adaptive significance of polyploidy has been extensively debated, and chromosome-level genome assemblies of polyploids can provide insight into this. The Australian grass Bothriochloa decipiens belongs to the BCD clade, a group with a complex history of hybridization and polyploid. This is the first genome assembly and annotation of a species that belongs to this fascinating yet complex group. Findings Using Illumina short reads, 10X Genomics linked reads, and Hi-C sequencing data, we assembled a highly contiguous genome of B. decipiens, with a total length of 1,218.22 Mb and scaffold N50 of 42.637 Mb. Comparative analysis revealed that the species experienced a relatively recent whole-genome duplication. We clustered the 20 major scaffolds, representing the 20 chromosomes, into the 2 subgenomes of the parental species using unique repeat signatures. We found evidence of biased fractionation and differences in the activity of transposable elements between the subgenomes prior to hybridization. Duplicates were enriched for genes involved in transcription and response to external stimuli, supporting a biased retention of duplicated genes following whole-genome duplication. Conclusions Our results support the hypotheses of a biased retention of duplicated genes following polyploidy and point to differences in repeat activity associated with subgenome dominance. B. decipiens is a widespread species with the ability to establish across many soil types, making it a prime candidate for climate change– resilient ecological restoration of Australian grasslands. This reference genome is a valuable resource for future population genomic research on Australian grasses." @default.
- W4376223815 created "2023-05-13" @default.
- W4376223815 creator A5017543531 @default.
- W4376223815 creator A5032305441 @default.
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- W4376223815 creator A5051286471 @default.
- W4376223815 creator A5074441405 @default.
- W4376223815 creator A5084273024 @default.
- W4376223815 date "2022-12-28" @default.
- W4376223815 modified "2023-09-30" @default.
- W4376223815 title "Genome assembly of an Australian native grass species reveals a recent whole-genome duplication and biased gene retention of genes involved in stress response" @default.
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