大豆病毒病与籽粒褐斑率关系的研究

通过对我院经作所保存的 ２４８份大豆种质资源在田间的种植表现，来研究我省夏大豆品种对大豆花叶病毒病的感染程度，再通过观察其相应品种籽粒的褐斑粒率来研究其相关性。结果表明：大豆花叶病发病程度与籽粒褐斑粒率的相关系数为０．１８６９，未达到显著水平。但在褐斑率低的品种中，一级病害的发生率明显多于三级；在褐斑率高的品种中，三级病害的明显多于一级病害的发生率。这说明病毒病的发生与褐斑率的高低可能有某种程度的关联。试验还选出启东八月白、苏豆 ４号、南农 ８８－３１等病害程度轻、褐斑率低的品种，可供杂交时做亲本使用。

A STUDY ON RELATIONSHIP BETWEEN VIRUS DISEASE AND MOTILIUG RATIO OF SEEDS OF SOYBEAN

soybean cultivars were planted in Naming. The infection degree of soybean cultvar by inoculation of SMV and seed mottling ratio of the corresponding cultivar were in- vestigated and the correlation between these two factors was studied. The results showed that: The correlation coefficient between grade of virus disease and mottling ratio of seeds was 0. 1869 below the significant level. However, more virus infection grade one plants hand lower mottling seed ratio than grade three plants had. The grade three plants by infection of virus had more mottling seeds than grade one plants. It showed that there might be some relationship between degree of virus disease and mottling ratio. Cultivar Aidong Bayuebai, Sudou No. 4 and Nannong 88-31 with lower grade of virus infaction and mottling ratio were selected as crossing parents.