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Several Factors Affecting Transformation Efficiency of tall Fescue  

김진수 (경상대학교 응용생명과학부)
이상훈 (경상대학교 응용생명과학)
이병현 (경상대학교 응용생명과학부)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.49, no.3, 2004 , pp. 237-242 More about this Journal
Abstract
A system for the production of transgenic plants has been developed for tall fescue (Festuca arundinacea Schreb.) via Agrobacterium-mediated transformation of mature seed-derived embryogenic callus. Seed-derived calli were infected and co-cultured with Agrobacterium EHA101 carrying standard binary vector pIG121Hm encoding the hygromycin phosphotransferase (HPT), neomycin phosphotransferase II (NPTII) and intron-containing $\beta$-glucuronidase (intron-GUS) genes in the T-DNA region. The effects of several factors on transformation and the expression of the GUS gene were investigated. Inclusion of $200\mu\textrm{M}$ acetosyringone (AS) in inoculation and co-culture media lead to a increase in stable transformation efficiency. Transformation efficiency was increased when embryogenic calli were co-cultured for 5 days on the co-culture medium. The highest transformation efficiency was obtained when embryogenic calli were inoculated with Agyobacterium in the presence of 0.1% Tween20 and $200\mu\textrm{M}$ AS. Hygromycin resistant calli were developed into complete plants via somatic embryogenesis. GUS histochemical assay and Southern blot analysis of transgenic plants demonstrated that transgenes were successfully integrated into the genome of tall fescue.
Keywords
Agrobacterium; forage crop; tall fescue; transgenic forage;
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