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为探讨两系杂交水稻培两优288高产保质制种原理与技术,对母本培矮64S不育性表达及制种基地气候生态条件的要求,父母本生长发育规律,制种异交特性及异交栽培,种子保纯,黑粉病防治等技术措施进行了研究.结果表明,该组合适宜在湖南一季稻区夏制,湘中、湘南双季稻区秋制,以育性敏感期和抽穗授粉期的安全为前提选择制种基地和安排播种期.对父母本实行定向栽培,母本群体要求稳长、多穗、整齐,父本要求多穗、大穗、花粉量足.母本较父本早始穗2~3d为理想花期相遇.“九二○”用量为600~675g/hm2,并适当刈叶,使母本穗层整齐,外露程度高,异交态势好.制种要求严格田间纯度检测.农业防治和药物防治相结合,控制稻粒黑粉病的严重发生有较好效果.
In order to discuss the principle and technology of high yield and quality seed production of two lines hybrid rice Peiliangyou, the requirement of female Pei’ai 64S for sterility and the climatic and ecological conditions of seed production base, the growth and development of parents, Outcrossing cultivation, seed purification, prevention and treatment of smut and other technical measures were studied. The results showed that the combination was suitable for the selection of seed production bases and planting seasons in the summer, mid-Hunan and southern Hunan double-cropping rice planting areas in the first season rice planting areas in Hunan Province, with the safety of fertility-sensitive period and heading-pollination period as the prerequisite. Targeted cultivation of parents, the mother of the population required stable, more spike, neat, more than the requirements of the father spike, big spike, enough pollen. The female parent had 2 or 3 days earlier than the father to meet the ideal flowering stage. “920” amount of 600 ~ 675g / hm2, and the appropriate moult, the mother panicle neat, high level of exposure, good heterosis. Seed production requirements strict field purity testing. Combining agricultural control and drug control has a good effect of controlling the serious occurrence of rice powdery mildew.