Abstract Ginkgo biloba was introduced into USA from England in 1784. It was grownand researched in more than 20 states in USA. Recently systematic researches are con-ducted on the development of short and long branches of this species , its embryonic de-velopment , variety of male plant , vegetative reproduction , basal burls , tissue culture ,expression of sex, culture, effective elements in leal and mechanism of insect and dis-ease resistance. China is the distribution center of this species with a long h...
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