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1 July 2008 Expressed cDNAs from Embryonic and Larval Stages of the Horn Fly (Diptera: Muscidae)
F. D. Guerrero, S. E. Dowd, V. M. Nene, L. D. Foil
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We used an expressed sequence tag approach to initiate a study of the genome of the horn fly, Hematobia irritans (L.) (Diptera: Muscidae). Two normalized cDNA libraries were synthesized from RNA isolated from embryos and first instars from a field population of horn flies. Approximately 10,000 clones were sequenced from both the 5′ and 3′ directions. Sequence data from each library was assembled into a database of tentative consensus sequences (TCs) and singletons and used to search public protein databases and annotate the sequences. Additionally, the sequences from both the egg and larval libraries were combined into a single database consisting of 16,702 expressed sequence tags (ESTs) assembling into 2886 TCs and 1,522 singleton entries. Several sequences were identified that may have roles in the horn fly’s resistance to insecticides. The availability of this database will facilitate the design of microarray and other experiments to study horn fly gene expression on a larger scale than previously possible. This would include studies designed to investigate metabolic-based insecticide resistance, identify novel antigens for vaccine-based control approaches, and discover new proteins to serve as targets for new pesticide development.

F. D. Guerrero, S. E. Dowd, V. M. Nene, and L. D. Foil "Expressed cDNAs from Embryonic and Larval Stages of the Horn Fly (Diptera: Muscidae)," Journal of Medical Entomology 45(4), 686-692, (1 July 2008).[686:ECFEAL]2.0.CO;2
Received: 4 February 2008; Accepted: 7 April 2008; Published: 1 July 2008

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cytochrome P450
expressed sequence tags
Hematobia irritans
insecticide resistance
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