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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。
154 indoor varieties of early and late indica rice (lines) in Guangdong were identified as resistant to rice blast, comprehensive anti-spectrum test and ward identification results. 154 varieties were classified as There are 6 categories, 22 with high resistance, accounting for 14.29%, 23 with resistance, accounting for 14.94%, 30 with moderate resistance, accounting for 19.48%, 22 with feeling, accounting for 14.29% and 27 with feeling. A, accounting for 17.53%, a sense of the high 30, accounting for 19.48%. The relationships among anti-spectrum, field leaf blast and panicle blast were compared. Most of the three cultivars showed good correlation, but a few cultivars had lower correlation. The disease severity of three rice blast nurseries was ranked as Conghua Nursery, Yangjiang Nursery and Longchuan Nursery. The results showed that the main source of blast resistance in new breeds of Guangdong in recent years were 28% of the total, and 25% of the resistant breeds of Asparagus I, R64 and other resistant rice species. It is proposed that the selection of resistant varieties should consider the diversity of resistant varieties as much as possible to avoid single planting of resistant varieties from the same source in one area and prolong the service life of resistant varieties.