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The genome of diamondback moth provides new clues for sustainable pest management
Date:1/13/2013

ta generated from ~1,000 male pupae, researchers identified the genome-wide level of polymorphism within the sequenced DBM strain (Fuzhou-S), which may lay the genetic bases for DBM in adapting to various environmental challenges. They investigated a set of genes preferentially expressed at the larval stage that contribute to odorant chemoreception, food digestion and metabolic detoxification. Interestingly, they found that the co-expression of sulfatase modifying factor 1 (SUMF1) and glucosinolate sulfatase (GSS) genes may be crucial for DBM to become a successful cruciferous herbivore.

Insecticide tolerance or resistance may have contribution to the option of detoxification pathway in insect herbivores. In this study, researchers found DBM has a larger set of insecticide resistance-related genes than silkworm (B. mori) that had little exposure to insecticide over 5,000 years of domestication. They identified in DBM obvious gene duplications of four gene families that participated in xenobiotic detoxification in insects, including ATP-binding cassette (ABC) transporter families, the P450 monooxygenases (P450s), glutathione S-transferases (GSTs) and carboxylesterase (COEs). Notably, the further analysis highlighted the potential role of ABC transporters in detoxification.

The clever evolutionary trick has allowed DBM to become such a serious pest, and it may play an important role in the development of its ability to detoxify a wide range of chemicals. "Remarkably, it appears that the very genetic adaptations that allow DBM to detoxify the chemicals in its food plants, and also allow it to develop immunity to the insecticides used against it." commented by Professor Geoff Gurr of Charles Sturt University, Australia, one of the international collaborators.

Professor Jun Wang, Executive Director of BGI, said, "The availability of a reference genome for a species is extremely important in the deeper understanding of its biology and evolution. We ar
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Contact: Jia Liu
liujia@genomics.cn
BGI Shenzhen
Source:Eurekalert

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