Journal
CROP PROTECTION
Volume 140, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cropro.2020.105414
Keywords
Brown planthopper; Neonicotinoid; Fitness cost; Genetic basis
Categories
Funding
- National Natural Science Foundation of China [31871989]
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The study found that resistance of Nilaparvata lugens to clothianidin is controlled by multiple genes, exhibiting autosomal and incompletely dominant traits. The resistant strain showed lower relative fitness, significantly increased adult preoviposition period, and significantly decreased total fecundity.
Clothianidin is a neonicotinoid insecticide that acts as a full agonist stimulating nAChRs and is widely used to control the brown planthopper, Nilaparvata lugens (Stal). To investigate the adaptation of N. lugens in the process of developing resistance to clothianidin, a clothianidin-resistant N. lugens strain and an unselected strain were used in this study. The F-1 reciprocal crosses between the resistant and the susceptible strains indicated that the observed resistance was autosomal and incompletely dominant. Chi-square analyses of self-bred and backcrossed progenies suggested that the observed resistance was controlled by multiple genes. The resistant strain exhibited a relative fitness of 0.78 with a significantly increased adult preoviposition period and significantly decreased total fecundity. The current study provides valuable information for resistance management strategies to delay the development of clothianidin resistance in N. lugens.
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