云南稻种对细菌性条斑病抗性的研究

STUDIES OF RESISTANCE TO BACTERIAL LEAF STREAK IN THE LOCAL RICE VARIETIES OF YUNNAN PROVINCE

在自然发病条件下,鉴定了3569份云南稻种对水稻细菌性条斑病的抗性。结果:供试稻种中有高抗材料286份,其出现频率为8.02%,中抗材料718份,其出现频率为20.1%。抗病品种的出现频率与稻种类型有关,也有明显的地区性。根据试验结果,可将云南省划分为5个抗病品种分布区。

Reaction of 3569 local varieties of rice to bacterial leaf streak ( caused by Xan thomonas campestris PV. Oryzicola ) , collected from Yunnan province in China, was tested under natural infection in 1986. A total of 286(8.02%) varieties were highly resistant and 718(20.1%) were moderately resistant. The results indicated that the frequency of resistant varieties is conrelated with rice types as well as altitude. The distribution of resistant varieties suggested five different regions that are charactenized by different frequencies of resistant varieties.