A comparison of a bunt smut from imported bluegrass seeds with its allied fungal species
从进口早熟禾种子中检出的一种腥黑粉菌与其近似种的比较

Several spicies of the bluegrass (Poa L.) are important herbage and lawngrass. In recent years, an undetermined species of Tilletia (T. sp.) which causes bunt smut of Poa spp. had been frequently intercepted from introduced seeds of Kentucky bluegrass, Canada bluegrass and annual bluegrass. An integrated comparison of the spicies on morphological, germination and cytological characters of teliospores with several morphologically allied Tilletia species, T. sterilis, T. togwateei, T. bromi and T. fusca was carried out. The result showed that there are significant discrepancies between T. sp. and T. sterilis, T. togwateei, while the differences between T. sp. and T. bromi, T. fusca are not obvious. The T. sp. is more closer to T. bromi morphologically. According to the results, we considered that the T. sp. and T. bromi are same species.