不同外源激素对羊草有性生殖数量性状调控作用的研究

Leymus chinensis has low power on sexual reproduction and is dominant by vegetative reproduction. It has a poor seeds production, which restrain the using of it seviously. Plant hormones are key factors in controlling the reproductive growth of plants. A field experiment was conducted to evaluate the effects of plant hormones (GA3, IAA, KT) on the number characters traits of sexual reproduction of L. chinensis. The results indicated that, IAA had no effect on heading number , heading percent, spikelets per spike, florets per spikelets, seeds number, seed percent and one thousand-seed weight (P > 0.05). GA3 and KT could increasing the number of florets per spike, seeds number per spike significantly (P < 0.05), and then increasing the weight of per spike, weight of seeds per spike and seed yield. The effect of KT on these indexes was higher than that of GA3. So we concluded that GA3 and KT accelerated the florets differentiation and IAA had no effect on the traits of sexual reproduction number characters of L. chinensis.