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粳型杂交水稻因辽宁省农科院1975年首先育成黎优57 (黎明A×C_(57)) 而突破,并用于生产.但由于北方杂交粳稻是中粳类型,引入我省作双季晚粳种植,熟期缩短,秧龄弹性小,优势难以发挥.因此,我们从1977年以来,在借鉴兄弟单位选育经验及育种材料的基础上,开展了长江流域杂交粳稻新组合的选育.目的是为了适应我省以早籼晚粳为主体的熟制需要,从双晚利用杂种优势的角度来扩大杂交稻种植区域,提高单产,为改变我省双晚产量低而不稳的现状提供经济有效措施.经五年九代选育,目前已初步育成10个新不育系和5个新恢复系,并从配制的一批新组合中,经全省预试鉴定出两个强优组合,获得一些有希望的材料.现综合报告如下:
Japonica hybrid rice was first breached and used for production because Liaoning Academy of Agricultural Sciences first cultivated Liyou 57 (Dawn A × C_ (57)) in 1975. However, since the northern hybrid japonica rice is of middle japonica type, Therefore, we have carried out the breeding of new combinations of japonica hybrid rice in the Yangtze River Basin based on the experience of breeding and selection of breeding units in our brothers since 1977. Objective Is to adapt to the province of early indica rice as the mainstay of cooked needs, from double utilization of heterosis point of view to expand the hybrid rice cultivation area, increase yields, to change the province’s double night production low and unstable status of the economy Effective measures.After five generations of nine generations of breeding, has initially bred 10 new sterile lines and 5 new restorer lines, and from the preparation of a new batch of combinations, the province pre-test identified two strengths combination , Get some hopeful material. The comprehensive report is as follows: