【摘要】 采用室内苗期抗谱测定和病区病圃鉴定方法,对广东154个早晚籼稻品种(系)进行了抗稻瘟病鉴定,综合抗谱测定和病区病圃鉴定结果,把154个品种归为6个类别,高抗的22个,占14.29%,抗的有23个,占14.94%,中抗的有30个,占19.48%,中感的有22个,占14.29%,感的有27个,占17.53%,高感的有30个,占19.48%。比较了品种的抗谱、田间叶瘟以及穗瘟三者间的关系,大部分品种三者表现出较好的相关性,但有少数品种的相关性较低。3个稻瘟病圃的病害严重度排序为从化病圃、阳江病圃及龙川病圃。对抗~高抗的部分品种进行亲本分析,结果表明:广东近年来新品种的抗稻瘟病亲本来源主要有28占、巴太早香I、R64等抗源稻种。提出在抗病品种的选用上,尽量考虑抗病品种的多样性,避免来源于相同抗源的抗病品种在一个区域的单一种植,延长抗病品种的使用寿命。更多还原

【Abstract】 Evaluation on resistance of 154 indica rice varieties had been conducted.154 varieties were classified into six groups based on their resistance spectrum test and field resistance evaluation,of which expressed different resistance level,including high resistance(22,14.29%),resistance(23,14.94%),moderate resistance(30,19.48%),moderate susceptible(22,14.29%),susceptible(27,17.53%) and high susceptible(30,19.48%).The relationship among resistance spectrum, leaf blast and panicle blast of most tested vaieties is relative,but the positive relationship had not been found in a few varieties.The order of disease severity in three rice blast nurseries(BN) is Conghua BN,Yangjiang BN and Longchuan BN.Analysis of the pedigree of resistance varieties indicated that the blast resistant donors of the varieties mostly derived from three resistant donors 28 zhan,Bataizaoxiang and IR64.Strategy for the utilization of the blast resistant varieties had been discussed.更多还原