Abstract:

In order to identify the effects of chemicals at different concentration on Ricinus communis sex expression, androgynous gender lines(E09004、E09009 and E09002) and pistillate lines (E09002) were used as the materials, and their percentages of female flowers were analyzed after spraying chemical(GA3, NAA, Eth, 6-BA and AgNO3) at different concentration, results showed that: GA3 on 100 mg/L level could promote the formation of female flowers, and the female flower percentages were increased comparing to the control, while GA3 at 250 mg/L was beneficial to the differentiation of male flowers, and the rates of female flowers were decline; after spraying NAA, the female flower percentage was enhanced, and 6-BA exhibited the same effect, moreover, some pistillate plants were discovered after spraying a certain concentration of 6-BA or NAA; Ethylene could induce the differentiation of male flower bud, the androgynous gender lines could be masculinized when spraying Eth at an optimal concentration; AgNO3 had the obvious effect on promoting the male flower formation, after spraying AgNO3, the male flower percentage of androgynous ?gender lines was increased and a few male flowers appeared on some pistillate lines; furthermore, some special materials such as male plant, pistillate plant were obtained. The result and special materials in this study offer the reference for sex reversion induction, reproduction of pistillate lines and the research of sex differentiation in Ricinus communis.