中文摘要：

研究了栗疫病菌（Cryphonectria parasitica）菌株间单个营养体不亲和性（vegetative incompatibility，vic）基因差异对弱毒性病毒传递的影响。将含病毒菌株与具单个vic面基因座位差异的野生型菌株配对培养，10d后调查菌株间的病毒传递率。结果表明，相同vic基因型菌株间的病毒传递率为100％；在1个vic座位上的基因不同通常会降低病毒的传递率，在vic-Cc座位上基因差异菌株间的病毒平均传递率为85．93％，而在vic—Dd座位上基因不同菌株间病毒的平均传递率仅为10．30％，在vic-Aa、vic—Bb座位上二基因不同的菌株间病毒平均传递率分别为44．12％、47．93％。vic-Bb座位上基因不同菌株间的病毒正反向传递率相差非常大，由vic—b菌株向vic—B菌株的平均病毒传递率为83．13％，而从vic-B菌株向vic—b菌株的平均病毒传递率只有23．15％；其他3个vic座位上基因不同菌株间的病毒传递率也具有方向性，但不明显。

英文摘要：

Effect of heteroallelism at each vegetative incompatibility （vic） locus on transmission of hypovirus in Cryphonectria parasiitica was characterized. The 16 isolates of different genotype at 4 vic loci were obtained through sexsual crossing between isolates which have known genotypes. Virus transmission was assayed by growing donor and recipient isolates together. Virus transmission occurs with 100% frequency when donor and recipient isolates have the same vic genotypes but heteroallelism at one of these loci generally reduced virus transmission. Transmission occurred in 85.93% of pairings that were heteroallelic at vic-Cc while only in 10. 30% of pairings that were heteroallelic at vic-Dd. The average virus transmission rates were 44. 12% and 47.93% respectively when vic-Aa and vic-Bb were heteroallelic. Virus transmission was asymmetric, at the extremes, pairs that were heteroallelic at vic- Bb showed strong asymmetry： transmission rate was 83. 13% when virus transfer from vic-b isolate to vic-B but occurred only 23. 15% when virus transfer from vic-B isolate to vic-b, and in other vic loci this asymmetry were also observed though not significantly.