【摘要】 为了培育耐寒抗病优质高产的粳稻新品种,选用日本和中国云南的稻种遗传资源231个品种作亲本,杂交2381次。表明在云南高原地区进行粳稻育种,较好的亲本有轰早生、滇榆1号、83—81及云粳135（轰早生/晋宁768）、合系13号83—81/滇榆1号）。云亲3号和云亲2号是用高抗稻瘟病的云南陆稻经过株型改良育成的优良抗病中间亲本。要育成耐寒性很强的优质高产水稻良种,直接利用耐寒性极强的地方品种作亲本是难以成功的,需改良其株型育成中间亲本。如果能育成耐寒性和稻瘟病抗性均强的优良中间亲本,将有利于提高培育耐寒抗病优质高产四特性兼优品种的效率。更多还原

【Abstract】 231 rice varieties (Oryza sativa L.) were selected from Japan and Yunnan, China as parent plants and crossed 2381 times. The results showed that the superior parent Plants were ’todorokiw-ase’, ’Dianyu 1’, ’83-81’, ’Yunkeng 135’ (todorokiwase/Jinning 768) and ’Hexi 13’ (83-81/Dianyu 1) growing in the Yunnan plateau. ’Yunqing 2’ and ’Yunqing 3’ were elite intermediate parents, which were bred from Yunnan upland rice varieties with high blast resistance and its planttype had been improved. It was hardly successful to breed elite rice with high cold tolerance using the local hard -nesscv. directly as parents. So some intermediate type as parents are needed to increase the efficiency of screening advanced varieties with high yield, quality, disease resistance and cold tolerance.更多还原