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Chlorpyrifos-resistant (Rc)  Plutella xylostella  (DBM) shows higher wing-vein injury than chlorpyrifos-susceptible (Sm) DBM under heat stress in our previous study. To investigate the toxicological mechanisms of the differences in injury of wing vein between Rc- and Sm-DBM collected from Fuzhou, China, total ten cDNA sequences of wing-development-related genes were isolated and characterized in DBM, including seven open reading frame (ORF) ( ash 1,  ah2 ,  ash3 ,  ase ,  dpp ,  srf  and  dll  encoded 187 amino acids, 231 aa, 223aa, 397aa, 423aa, 229aa and 299aa, respectively), and three partly sequences ( salm ,  ser  and  wnt - 1  encoded 614aa, 369aa and 388aa, respectively). The mRNA expression of the genes was inhibited in Rc- and Sm-DBM under heat stress, as compared with that an average temperature (25 °C). And, in general, significantly higher down-regulated expressions of the mRNA expression of the wing development-related genes were found in Rc-DBM as compared to those in Sm-DBM under heat stress. The results indicated that Sm-DBM displayed higher adaptability at high temperature because of significantly lower inhibition the mRNA expressions of wing-development-related genes. We suggest that significantly higher injury of wing vein showed in Rc-DBM under heat stress might be associated with the strong down-regulation of wing-development-related genes.

Cloning of Wing-Development-Related Genes and mRNA Expression Under Heat Stress in Chlorpyrifos-Resistant and -Susceptible Plutella xylostella