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在杂交水稻汕优6号制种过程中,由于父、母本开花习性的不同,常常出现花期相遇而花时不遇的现象,从而影响异交结实率和制种产量。为此,我校于1977年和1978年在汕优6号秋季制种中,对母本珍汕97A和父本IR26的开花习性进行了观察,并于1978年进行了在母本上喷施保温剂的花时调节试验。 1.1978年9月3日我们在父、母本中各随机抽取10丛稻,经观察记载,珍汕97A从见穗至齐穗的平均历期为9.8天,比IR26长2天左右。另外又随机抽取20个稻穗,观察到,珍汕97A每一个穗的始花至终花平均历期为9.1天,约比IR26长1天左右。说明珍汕
In the hybrid rice Shanyou 6 seed production process, due to the different parents and female habit of flowering, flowers often encounter the phenomenon of time-consuming encounter, thus affecting the rate of outcrosses and seed production. To this end, our school in 1977 and 1978 in Shanyou 6 autumn seed production, female parent Zhenshan 97A and paternal IR26 flowering habits were observed, and in 1978 carried out in the female parent spraying Time-conditioning test of the incubator. 1. September 3, 1978 We randomly selected 10 parents of rice in the parent and the parent. According to the observation, the average duration of Zhenshan 97A from ear to ear was 9.8 days, about 2 days longer than that of IR26. In addition, 20 rice ears were randomly selected. It was observed that the average flowering and the end of each ear of Zhenshan 97A averaged 9.1 days, about 1 day longer than that of IR26. Description Zhen Shan