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我国南北稻区每年都受到不同程度的冷害,给水稻生产带来严重损失。1981年浙江省遭受较强的低温为害,致使迟熟品种减产2～3成,有的颗粒无收。因此,选用早熟抗寒水稻品种,历来被人们所重视,早熟是重要的育种目标之一。目前获得水稻早熟性的方法有二种。一是利用早熟亲本进行有性杂交,一是应用辐射处理筛选早熟突变体。我们早在1977年即利用水稻花药培养育成
China’s rice fields in the north and south are subject to varying degrees of cold damage each year, which has brought serious losses to rice production. In 1981, Zhejiang Province suffered a strong cold damage, resulting in late maturing varieties 2 to 3 percent, some of the crop without payment. Therefore, the selection of early-maturity cold-resistant rice varieties has always been people’s attention, early maturity is one of the important breeding goals. Currently there are two ways to get rice premature. First, the use of precocious parents for sexual hybridization, one is the use of radiation treatment screening of early mutants. As early as 1977, we cultivated rice anther culture