花信灵在杂交水稻制种上利用研究

Application of Hua Xin Ling to Hybrid Rice Breeding Research

本试验研究了花信灵对杂交水稻制种的影响。结果表明：花信灵能使不育系提早开花，使恢复系推迟开花，达到两系花时相遇；花信灵能促进不育系抽穗，减少包颈长度，增加外露的颖花数；花信灵还能增加两系的开花数和午前花数。因此有利于授粉，提高异交结实率，增加每穗实粒数，使制种产量提高。

The effects of Hua Xin Ling (a growth regulator) on hybrid rice breeding were carried out. The results indicate that Hua Xin Ling can make the sterile line bloomed earlier and delay the flowering of the restore line, thus, obtain synchronization of flowering for the two lines; Hua Xin Ling can promote the sterile line heading, make less enclosed in the leaf sheet, increase the number of spikelet exsertion. Hua Xin Ling also can increase the bloom numbers of two lines and the blooming numbers before noon. It is favorable for the pollination, enhance the rate of outcross seed-setting, increasing the filled grain per spike,improving the breeding production.