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对 3个回交组合育种效果及育种技术进行了研究。结果表明 ,回交育种方法是抗灰斑病育种有效方法之一 ,对提高品种的抗病性效果显著 ,对品种的产量水平也有较大幅度提高 ,在生产上应用效果好。黑龙江省农科院合江农科所利用此方法育成了合丰 2 7号、合丰 30号和合丰 32号 3个高抗灰斑病大豆品种 ,累计推广应用面积 6 6 7万hm2 ,创纯社会经济效益 4 0亿元 ,对解决生产上大豆灰斑病的危害起到了重要的作用
The effects of three backcross combinations breeding and breeding techniques were studied. The results showed that the backcross breeding method was one of the effective methods to resist the gray leaf spot, which had a significant effect on improving the disease resistance of the varieties and greatly improved the yield level of the varieties and had good application effects in production. Heilongjiang Academy of Agricultural Sciences, Hejiang Agricultural Science Institute of this method bred Hefeng 2 7, Hefeng 30 and Hefeng 32 three high resistance to gray spot disease soybean varieties, the cumulative promotion of the application area of 66,700 hm2, record The net social economic benefit of 400 million yuan has played an important role in solving the danger of soybean gray spot on the production