杂交水稻新组合汕优广12的父本广12,花时在9～13时,盛花在10～12时,峰值出现在11时,单株花期长达13天。母本珍汕97A花时分散。制种花时相遇在每天9～13时,集中在11～12时。花时全遇时,结实率早造达45.88％,晚造达43.75％。花时相隔48小时授粉,结实率仍可达20％。这一特征,为制种夺高产提供了生物学依据。 The new hybrid rice combination Shanyou Guang 12 male wide 12, spent 9 to 13, full bloom at 10 to 12, the peak appeared at 11 o’clock, flowering per plant up to 13 days. Female parent Zhenshan 97A flowers scattered. Seeds when the flowers meet 9 to 13 per day, concentrated in 11 to 12 o’clock. When full of flowers, the rate of early fruiting 45.88%, 43.75% late. Flower pollination 48 hours apart, the seed setting rate is still up to 20%. This feature provides a biological basis for the production of high yield.