Additional sequence information: dataset of non-autonomous LTR retrotransposons in sugar beet

Plant genomes are rich in retrotransposons and their derivatives and are subject to constant sequence turnover. Because short, non-autonomous retrotransposons do not encode protein products, they experience reduced selective constraints on their DNA sequences. This relaxed selection promotes diversification into multiple families, which are often restricted to only a few species. The lack of coding capacity, together with the tendency of these elements to form numerous subfamilies, has resulted in an incomplete characterization of non-autonomous LTR retrotransposons in most genomic repeat annotations. This dataset provides additional sequence information supporting our study on non-autonomous LTR retrotransposons and includes the following files: 1.) 01_TRIMs_all_seqs_KWS2320ONT_element_trimmed_5bp: Nucleotide sequences of all identified non-autonomous full-length elements provided in FASTA format (.fasta), along with corresponding feature annotations in GFF format (.gff). 2.) 02_solo_LTR_trimmed_5bp: FASTA files (.fasta) containing all identified solo and single LTRs for each non-autonomous LTR retrotransposon family in the dataset, with corresponding GFF annotations (.gff). 03.) 03_TRIM_tandem_arranged_copies_element_trimmed_5bp: FASTA files (.fasta) of all identified tandemly arranged TRIM sequences for each family, together with corresponding feature annotations (.gff). All nucleotide sequences are provided with annotations of detected features, including long terminal repeats (LTRs), primer binding sites (PBS), and polypurine tracts (PPT). Each sequence additionally includes a 5-nucleotide flanking window, and, where available, corresponding annotations for target site duplications (TSDs).