EFFECT OF GIBBERELLIC ACID (GA3) APPLICATION ON MALE-STERILITY IN BARLEY (HORDEUM VULGARE L.)

Abstract

In the present study, the effects of various GA3 doses on male-sterility in barley (Hordeum vulgare) which is important in breeding were investigated during the determined periods. Anther length (mm), pollen number, pollen length (mm), sterile pollen ratio (%) and seed set ratio (%) were investigated. The research was established in a factorial design with 3 replications. Five different doses of the GA3 (0, 200, 400, 600 and 800 ppm GA3) and application periods in barley growth stages (A: tillering, B: bolting and C: booting) were handled as different factors. Factorial experiment with a single control group was used to determine the difference between the mean of control groups and subgroups. In the study, the applications during the booting period led to the positive results in terms of all the features. Generally, 600 ppm application was more effective for most studied properties except for anther length and pollen length.