RESISTANCE TO RICE TUNGRO-ASSOCIATED VIRUSES IN RICE UNDER EXPERIMENTAL AND NATURAL CONDITIONS
RESISTANCE TO RICE TUNGRO-ASSOCIATED VIRUSES IN RICE UNDER EXPERIMENTAL AND NATURAL CONDITIONS
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DOI：
10.1094/phyto-77-871
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发表时间：
1987-06-01
期刊：
影响因子：
3.2
通讯作者：
FLORES, ZM
中科院分区：
文献类型：
--
作者：
HIBINO, H;TIONGCO, ER;FLORES, ZM
东格鲁病是由东格鲁杆状病毒（RTBV）和东格鲁球形病毒（RTSV）感染引起的一种复合疾病。这两种病毒都能通过叶蝉（Nephotettix virescens）有效传播。在田间和温室条件下对国际水稻研究所开发的抗叶蝉水稻品种进行了评价。在田间，中抗品种在低病毒接种量和叶蝉水平下东格鲁病毒感染率低，但在高水平下感染率高。抗性品种的感染率低，无论接种物或叶蝉水平。品种对叶蝉的抗性是由于对叶蝉成虫的选择性和非选择性。在质量或试管接种与叶蝉喂养的植物感染RTBV和RTSV，抗性品种表现出越来越多的叶蝉感染率。当胶乳血清学试验被用来索引这些接种植物，抗性品种有增加RTBV感染率，而中度抗性品种有增加RTBV和RTSV感染率。感病品种有较高的RTBV和RTSV感染率，无论叶蝉数量。当抗病品种单独接种RTSV时，发生了相当高的感染率。抗性品种田间感染率低的原因是它们对叶蝉的抗性。
Tungro is a composite disease resulting from infection with both rise tungro bacilliform virus (RTBV) and rise tungro spherical virus (RTSV). Both viruses are transmitted efficiently by the leafhopper Nephotettix virescens. Rice cultivars developed by the International Rice Research Institute with resistance to leafhoppers were evaluated under field and greenhouse conditions. In the field, moderately resistant cultivars had low tungro infection rates under low virus inoculum and leafhopper levels but high infection rates under high levels. Resistant cultivars had low infection rates regardless of inoculum or leafhopper levels. Resistance in cultivars was due to both antibiosis and nonpreference to adult leafhoppers. In mass or test-tube inoculations with leafhoppers that had fed on plants infected with RTBV and RTSV, resistant cultivars showed increasing rates of infection with increasing numbers of leafhoppers. When latex serological tests were used to index these inoculated plants, resistant cultivars had increasing RTBV infection rates, whereas moderately resistant cultivars had increasing RTBV and RTSV infection rates. Susceptible cultivars had high RTBV and RTSV infection rates irrespective of leafhopper number. When resistant cultivars were inoculated with RTSV alone, fairly high infection rates occurred. Low field infection rates in the resistant cultivars can be explained by their resistance to the leafhopper.