A study of repetitive sequences in the genome of <i>Sinopodisma qinlingensis</i>

The family Acrididae characterized by a remarkable genome size and a significant proportion of repetitive sequences. In this study, we find a considerable characteristics by examining the <i>Sinopodisma qinlingensis</i>, which has an average genome size within the range observed in Acrididae. The genome size of <i>S. qinlingensis</i> was determined to be 11.37 pg for females and 10.95 pg for males using flow cytometry. The analysis of low-coverage sequencing data revealed that the total repeat content of the genome was 63.58%, with long terminal repeat (LTR) elements accounting for 17.74% of the genome contents. Phylogenetic analysis of the reverse transcriptase (RT) domains, which are found within LTR and LINE sequences with consistent conserved motifs, showed that LTR elements belong to multipl within a monophyletic branch. This finging suggests that LTR elements did not originate independently, but rather shared a common evolutionary history. Additionally, the content of Ty3-Gypsy sequences within LTR elements was found to be significantly increased. Fluorescence <i>in situ</i> hybridisation (FISH) showed that most satellite DNA and LTR elements exhibited an aggregated distribution pattern on the chromosome.