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The male sterility fluctuation of photo-thermo-sensitive genie male sterile(P(T) CMS Jlines induced by low air temperature is a key problem troubling the application of two-line system hybrid rice.The paper suggests to solve this problem by the breeding approaches,i.e,developing low sterile critical temperature P(T)GMS lines,herbicide resistant restorer lines,herbicide sensitive P(T)GMS lines and tetracydine-conditioned P(T)GMS lines to ensure the hybrid purity;and by the hybrid seed production techniques,i.e,taking the correct procedure of foundation seed production,the suitable district and season for hybrid seed production and the deep irrigation method against cold weather in high summer.
The male sterility fluctuation of photo-thermo-sensitive genie male sterile (P (T) CMS Jlines induced by low air temperature is a key problem troubling the application of two-line system hybrid rice. The paper suggests to solve this problem by approaches, ie, developing low sterile critical temperature P (T) GMS lines, herbicide resistant restorer lines, herbicide sensitive P (T) GMS lines and tetracydine-conditioned P (T) GMS lines to ensure the hybrid purity; production techniques, ie, taking the correct procedure of foundation seed production, the suitable district and season for hybrid seed production and the deep irrigation method against cold weather in high summer.