A Chromosome-level Sequence Assembly Reveals the Structure of the Arabidopsis Thaliana Nd-1 Genome and Its Gene Set
Overview
Authors
Affiliations
In addition to the BAC-based reference sequence of the accession Columbia-0 from the year 2000, several short read assemblies of THE plant model organism Arabidopsis thaliana were published during the last years. Also, a SMRT-based assembly of Landsberg erecta has been generated that identified translocation and inversion polymorphisms between two genotypes of the species. Here we provide a chromosome-arm level assembly of the A. thaliana accession Niederzenz-1 (AthNd-1_v2c) based on SMRT sequencing data. The best assembly comprises 69 nucleome sequences and displays a contig length of up to 16 Mbp. Compared to an earlier Illumina short read-based NGS assembly (AthNd-1_v1), a 75 fold increase in contiguity was observed for AthNd-1_v2c. To assign contig locations independent from the Col-0 gold standard reference sequence, we used genetic anchoring to generate a de novo assembly. In addition, we assembled the chondrome and plastome sequences. Detailed analyses of AthNd-1_v2c allowed reliable identification of large genomic rearrangements between A. thaliana accessions contributing to differences in the gene sets that distinguish the genotypes. One of the differences detected identified a gene that is lacking from the Col-0 gold standard sequence. This de novo assembly extends the known proportion of the A. thaliana pan-genome.
Baasner J, Rempel A, Howard D, Pucker B PLoS Comput Biol. 2025; 21(2):e1012732.
PMID: 39964984 PMC: 11849982. DOI: 10.1371/journal.pcbi.1012732.
Disruption of recombination machinery alters the mutational landscape in plant organellar genomes.
Waneka G, Broz A, Wold-McGimsey F, Zou Y, Wu Z, Sloan D bioRxiv. 2024; .
PMID: 38895361 PMC: 11185577. DOI: 10.1101/2024.06.03.597120.
ACMGA: a reference-free multiple-genome alignment pipeline for plant species.
Zhou H, Su X, Song B BMC Genomics. 2024; 25(1):515.
PMID: 38796435 PMC: 11127342. DOI: 10.1186/s12864-024-10430-y.
Lian Q, Huettel B, Walkemeier B, Mayjonade B, Lopez-Roques C, Gil L Nat Genet. 2024; 56(5):982-991.
PMID: 38605175 PMC: 11096106. DOI: 10.1038/s41588-024-01715-9.
Automatic annotation of the bHLH gene family in plants.
Thoben C, Pucker B BMC Genomics. 2023; 24(1):780.
PMID: 38102570 PMC: 10722790. DOI: 10.1186/s12864-023-09877-2.