Genetic diversity analysis reveals variations in the mitochondrial COI gene of Leptocorisa oratoria across locations, showing notable haplotype divergence.
The paddy gundhi bug, Leptocorisa oratoria Fab. is a common pest species found throughout India. The genetic diversity studies of these bugs from India were conducted during 2022-2023. Morphologically identified representative specimens were selected for DNA isolation. The L. oratoria from 14 locations in India were analysed for variations in the mtCOI gene to identify the genetic diversity. The nucleotide variations showed maximum variations at 21 sites in the population collected from Odisha. Variations in the amino acids revealed the maximum composition of Leucine in all the 14 sequences, with higher A+T bias. Haplotype analysis yielded 12 haplotypes from 14 sequences of L. oratoria. The analysis of haplotype divergence, assessed through Tajima’s D statistics indicated the presence of low-frequency polymorphisms. The genetic distance and nucleotide diversity were low probably due to the absence of geographical barrier, gene flow and migration. This is the first attempt to analyse molecular data for this well-known and serious pest of paddy from India.
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Lahari et al. (2024) studied this question.
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