Marker Gene Delivery to Mature Wheat Embryos Via Particle Bombardment

Authors : Hüseyin Avni ÖKTEM, Füsun İnci EYİDOGAN, Fahriye Setenci ERTUĞRUL, Meral YÜCEL

Pages : 303-308

View : 21 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The possibility of transferring genes to mature wheat embryos insert ignore into journalissuearticles values( Triticum aestivumL. and T. durum Desf.); via accelerated and DNA-coated tungsten particles was investigated. Mature embryos isolated from bread insert ignore into journalissuearticles values(cv. Atay); and durum insert ignore into journalissuearticles values(cv. Çakmak); wheat were utilised as targets for bombardment. DNA in the form of circular plasmid insert ignore into journalissuearticles values(pBSGUSINT); was precipitated on tungsten particles insert ignore into journalissuearticles values(ca. 2 mm diameter); using the calcium nitrate method. Mature embryos were bombarded by a microprocessor-controlled particle delivery instrument insert ignore into journalissuearticles values(GENEBOOSTER TM ); driven by compressed nitrogen gas. Bombardment was carried out at various gas pressure and in a chamber vacuum. The target material was subjected to histochemical GUS staining 24 hours after bombardment or 7 days after the initial germination of the embryos. Almost 80% of the bombarded embryos expressed the transferred GUS gene observed through blue colour formation on the embryos. Negative controls insert ignore into journalissuearticles values(non-bombarded embryos or embryos bombarded with bare tungsten particles); did not exhibit GUS activity. Seven-day-old seedlings which had emerged from bombarded material also exhibited patches of GUS staining, indicating the integration and expression of the transferred GUS gene to the genome of some tissue segments. The optimised bombardment method is currently in use to obtain transgenic wheat cultivars.
Keywords : wheat, mature embryo, transformation, particle bombardment, GUS