生产实践证明,选育丰产抗病良种,必先掌握抗源,并明确其抗性遗传和抗性基因的抗谱和效应,避免抗病育种的盲目性,而我国北方稻区粳型品种中过硬的抗源不多,兼抗的更少。所以我们要重视我国籼型品种的抗源,通过籼粳杂交,将籼稻抗性基因导入到粳稻中去。而抗源的转育的主要途径之一是人工杂交育种,人工去雄又是工效不断提高的关键。人工杂交去雄过去一般由人工用镊子和温汤杀雄,工效低,难予适应加速抗源转育的要求。筛选和创造新抗源与查明稻瘟病菌的生 Production practice has proved that breeding high yield and disease-resistant varieties, we must first master the source of resistance, and clear resistance to genetic and resistance genes of anti-spectrum and effect, to avoid the blindness of disease-resistant breeding, and rice varieties in northern China Excellent resistance to small, and anti-less. Therefore, we must attach importance to the resistance of indica varieties in our country. By crossing indica-japonica hybrids, we will introduce indica resistance genes into japonica rice. However, one of the main ways of resistance breeding is artificial crossbreeding, and artificial removal of male is the key to increasing work efficiency. Artificial hybrid to the male in the past generally by artificial tweezers and Wen Tang Kill, inefficient, difficult to adapt to speed up the requirements of anti-source transfer. Screening and creation of new sources of resistance and identification of Magnaporthe grisea