alexa 3xP3-EGFP marker facilitates screening for transgenic silkworm Bombyx mori L. from the embryonic stage onwards.
Genetics & Molecular Biology

Genetics & Molecular Biology

Gene Technology

Author(s): Thomas JL, Da Rocha M, Besse A, Mauchamp B, Chavancy G

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Abstract Transgenesis was recently achieved in Bombyx mori L., but it has proved difficult and time-consuming to screen the numerous progeny to identify the transgenic individuals. As the 3xP3-EGFP marker has been shown to be a suitable universal marker for transgenic insects (Nature 402 (1999) 370), we evaluated its use for embryonic-stage screening for B. mori L. germline transformation. Using the piggyBac-derived vector pBac[3xP3-EGFPaf], we were able to isolate four transgenic individuals from about 120,000 embryos (560 broods). The screening was straightforward due to EGFP production in the G1 embryonic stemmata, which was visible through the translucent egg chorion. EGFP was produced in the stemmata and central and peripheral nervous systems from the fifth day of embryonic development. It persisted at high levels in the stemmata throughout the larval stage, and was also present in the compound eyes and nervous tissues of the pupae and the compound eyes of the moths.
This article was published in Insect Biochem Mol Biol and referenced in Gene Technology

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