【摘要】 <正> 灰斑病(Cerocspora sojin Hara)在我省大豆产区均有分布,尤以东部三江平原低湿地区发生普遍,为害严重。灰斑病为害大豆叶、茎、荚子实,使产量和品质显著降低,并影响种子质量。一般减产12—15%,发病严重时减产达30%以上,感病子实的含油量、蛋白质含量和百粒重均有所降低。更多还原

【Abstract】 Frogeye leaf spot of soybean caused by Cercospora sojina Hara is the main disease in Sanjiang plain. Breeding resistant cultivars is accounted to be an available method for reducing damage of this disease.934 soybean cultivars were evaluated for disease resistance in 1976-1981,and 113 of them were proved to be highly resistant.On the basis of selecting resistance sources, 84 hybridized or backcross combinations were made. 41 lines with excellent integrative traits and resistant to frogeye leaf spot have been obtained by way of continuous selection under inoculating conditions. And two outstanding lines "Hejiao 80-706" and "Hejiao 81-1104", have been evaluated in regional test.The results showed that the resistance to frogeye leaf spot was a simple heredity controlled by a pair of dominant genes, while the susceptibility was controlled ty a pair of recessive genes.更多还原