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Transgenic Atractylodes macrocephala with double defense genes exhibiting resistanceto Rhizoctonia solani

MAO Bi-zeng, SUN Li, LIU Xue-hui(Institute of Biotechnology, Zhejiang University, Hangzhou 310029, China)  
Objective The transgenic Atractylodes macrocephala resistance to Rhizoctonia solani was obtained by gene engineering. Methods On the base of the efficient regeneration system of Baizhu via shoot organogenesis, the rice chitinase gene (RCH10) and the alfalfa β-1, 3-glucanase gene (AGLU) were tandem-inserted into the transformation vector pB101, which was transformed into A. macrocephala with gene gun. Transformants were confirmed by PCR, GUS assay, and disease resistant. Results Twenty-five independent transformants possessed desired genes were observed by PCR detection, and among them five transformants exhibiting resistance to Rhizoctonia solani. Conclusion The disease resistant variety has been obtained by transformation, which provides a shorten avenue for the direct introduction of novel traits into A. macrocephala through genetic engineering without the need for numerous back-crossing in breeding programs that slow down cultivar improvement, meanwhile it improves disease resistant gene pool.
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