Genetic variation in the triosephosphate isomerase gene of the fall armyworm and its distribution across China

In this study, we conducted full-length sequencing of theTpi genes from 5 representative FAW groups. Our findings revealed that theTpi genes varied in length from 1220 to 1420  bp, with the primary variation occurring within 4 introns. Notably, the exon lengths remained consistent, at 747 bp, with 37 observed base variations; however, no amino acid variations were detected. Through sequence alignment, we identified 8 stable variation sites that can be used to distinguis h FAW strains in the Eastern hemisphere. Additionally, we performed strain identification on 1569 FAW samples collected from 19 provinces in China between 2020 and 2021. The extensive analysis indicated the absence of the rice strain in the samples. Instead, we only detected the presence of the corn strain and the Zambia strain, with the Zambia strain being distributed in a very low proportion (3.44%). Furthermore, the corn strain could be further categorized into 2 subgroups. This comprehensive study provides a valuable reference for enhancing our understanding of FAW population differentiati on and for improving monitoring and early warning efforts.
Source: Insect Science - Category: Biology Authors: Tags: ORIGINAL ARTICLE Source Type: research