栗疫病菌的营养体亲和性基因和dsRNAs对病毒传播的影响

研究了栗疫病菌[Cryphonectria parasitica(Murr.)Barr]的营养体亲和性基因及dsRNA病毒对菌株间病毒特征传播的影响。试验选用已知4个VC基因座位的15个Vc基因型菌株和3种dsRNA病毒，通过含病毒菌株与野生型菌株的配对培养，将病毒逐个转入不同Vc基因型菌株。将不同Vc基因型的含病毒菌株与具特定VC基因差异的野生型菌株配对培养，根据培养两周后野生型菌株培养性状的改变与否，统计菌株间的病毒传播率。结果表明，各个VC基因对菌株间病毒传播的影响不同；存在2个VC基因差异的菌株间病毒传播率低于相差1个VC基因的：病毒在相差1个VC基因的菌株间的传播多具单向性：不同类型的病毒在菌株间的传播率也有差异。

EFFECTS OF VC GENES AND dsRNAs ON TRANSMISSION OF dsRNA IN CRYPHONECTRIA PARASITICA

The effects of different VC genes and viral dsRNAs upon the transmission of dsRNA among isolaus were tested in chestnut blight fungus, Cryphonectria parasitica.15 isolto with different VC genompes, which distributal on 4 VC loci, and 3 kindsof dsRNA were used in this study. Results showed that the transmission rates of dsRNA varied with spectific VC gene and dsRNA type; the mean transmission rates of dsRNA among isolates different at 2 VC loci were lower than that among isolates different at 1 VC locus; the directional exclusion to the transmission of dsRNA was found associated with Aa, Bb, and Dd VC loci.