【摘要】 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。更多还原

【Abstract】 The flowering habits of the parents of Shanyouguang 12, i.e. Guang 12, the restorer, and Zhenshan 97A, the sterile line, were observed. The flowering time of Guang 12 ranges from 9:00 a. m. to 13:00 p. m., the blooming period from 10:00 to 12:00 a. m., the peak is at 11:00 a. m. The flowering duration for each plant lasts for 13 days. The flowering time of Zhenshan 97A is diffused. The synchronization of the parents’ flowering time happens from 9:00 a. m. to 13: 00 p. m. every day. If the parents’ flowering time fully synchronizes, the setting percentage can be 45.88% for early season, 43.75% for late season. A 20% of setting percentage can be recorded even though the flowering time of the parents is 48 hours apart while pollination.更多还原