TECHNICAL ADVANCE Inverted repeat of a heterologous 30-untranslated region for high-efficiency, high-throughput gene silencing

Received 25 September 2002; revised 22 October 2002; accepted 27 November 2002. For correspondence (fax þ6 351 7050; e-mail [email protected]). yPresent address: Crop and Food Research, Private Bag 11600, Palmerston North, New Zealand. zPresent address: Sygen International, Suite 130, 2929 Seventh Street, Berkeley, CA 94710, USA. Present address: Molecular Biology Department, University of Wyoming, Laramie, WY 82070, USA. Present address: Torrey Mesa Research Institute, Syngenta Research and Technology, 3115 Merryfield Row, San Diego, CA 92121, USA. yyPresent address: Mendel Biotechnology, 21375 Cabot Boulevard, Hayward, CA 94545, USA.