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日本武田药品工业公司生药研究所利用传统的杂交方法,育成了药用植物地黄的优良品种并已用茎尖培养法繁殖。1987年春季起委托农家进行试种。地黄在日本由于发生病害,产量低,质量也差,因此现在已不栽培,100%依靠从中国进口。因地黄很难用种子繁殖,需利用无性繁殖才能栽培,所以易发生病毒等病害,降低产量,又因其根很长,在土壤中扎得很深很广,收获也很费时间。由于上述理由,武田药品公司为了稳定栽培和栽培合理化,对地黄进行了品种改良,用茎尖培养法繁殖已经选育出的新品种。
Japan’s Takeda Pharmaceutical Industries, Inc. Institute of crude drug using traditional hybridization methods, bred medicinal plant Rehmannia good breeds and stem tips culture has been breeding. The spring of 1987 commissioned farmers to try planting. Rehmannia in Japan because of disease, low yield, poor quality, it is no longer cultivated, 100% rely on imports from China. Rehmannia glutinosa is difficult to seed breeding, the need to use asexual reproduction can be cultivated, so easy to produce diseases such as viruses, reduce production, because of its long roots, deep in the soil is very deep, harvest is also time-consuming. For these reasons, Takeda Pharmaceutical Company in order to rationalize the cultivation and cultivation of Rehmannia improved varieties, with tip culture breeding methods have been bred new varieties.