【摘要】 1983-2007年,对南方稻区水稻区域试验品种、组合的白叶枯病抗性进行了研究。结果表明,在1 805个参试品种、组合中,78个表现抗白叶枯病,抗病品种频率为4.3%;其中,常规水稻74个,占抗病品种的94.9%。在1 219个籼型杂交水稻中,抗病的组合3个,中抗的76个,抗病和中抗组合频率分别为0.2%和6.2%。不同类型和不同生态型水稻的抗病品种频率差异显著,晚粳>早籼>中籼>晚籼;常规水稻>杂交水稻。籼型杂交水稻中抗病组合频率为:杂交晚稻>杂交早稻>杂交中稻。1990-2004年,17个抗或中抗白叶枯病的优良水稻新品种、组合通过国家审定。更多还原

【Abstract】 The reactions of 1805 cultivars from the southern rice regions in China to bacterial blight were studied during 1983-2007.The results indicated that 78 of 1805 varieties tested were resistant to bacterial blight,with a frequency of resistant varieties of 4.3%,and 74 of common rice varieties were resistant,with 94.9% of resistant varieties.The reactions of 1219 hybrid rice to bacterial blight were identified.The results showed that 3 hybrid rice varieties were resistant and 76 hybrid rice varieties were moderately resistant,with 0.2% and 6.2% of resistant varieties,respectively.There were notable differences between the frequency of resistant varieties and the type of rice or ecotype of rice.The frequency of resistant varieties of japonica rice was higher than that of indica rice,and early indica rice was higher than mid-season indica rice and late rice in the frequency of resistant varieties.The resistant variety frequency of common rice was higher than that of hybrid rice.The reaction of hybrid rice to bacterial blight was moderately resistant,and the resistance frequency of indica late hybrid rice was higher than early hybrid rice and mid-season hybrid rice.A total of 17 fine rice varieties with resistance or moderate resistance to bacterial blight were officially approved during 1990-2004.更多还原