广东省的晚稻,常因受台风和寒露风侵袭带来的影响,造成了洪涝、冷风和稻白叶枯病等暴发流行自然灾害,导致稻谷产量不稳不高。多年来,育种部门和植病部门共同合作,试图通过选育高产、高抗(包括抗病及抗自然灾害)、米质好的水稻新品种这一途径来解决这问题。在育种指标设计上,选育的晚型水稻品种必须在生育前中期能耐热、耐浸、抗白叶枯病,而在抽穗期具有耐低温、抗(耐)寒露风等抗逆性能。自1983年第一个纯晚型水稻新品种“青华矮6号”育成推广以来,由于达到了高产、抗 The late rice in Guangdong Province, often affected by typhoons and cold dew, has caused outbreaks of natural disasters such as floods, cold winds and rice bacterial leaf blight, resulting in unstable output of rice. Over the years, the breeding and phytosanitary departments have worked together to try to solve this problem by breeding high yield, high resistance (including disease resistance and natural disaster resistance) and good quality new rice varieties. In the design of breeding index, the late-maturing rice varieties bred must be resistant to heat, flooding and bacterial leaf blight in the middle and mid-stage of the breeding period, while they have the resistance to cold and wind at the heading stage. Since 1983, the first pure late rice variety “Qinghua dwarf 6” bred to promote, due to achieve high yield, resistance