High temperature effects on hypersensitive resistance to Tomato Spotted wilt Tospovirus (TSWV) in pepper (Capsicum chinense Jacq.)
High temperature effects on hypersensitive resistance to Tomato Spotted wilt Tospovirus (TSWV) in pepper (Capsicum chinense Jacq.)
复制标题
DOI：
10.1023/a:1008618022144
复制
发表时间：
1998-07-01
影响因子：
1.8
通讯作者：
Palloix, A
中科院分区：
文献类型：
--
作者：
Moury, B;Selassie, KG;Palloix, A
在32℃的连续温度下，Tsw基因赋予辣椒的番茄斑点枯萎病毒抗性较不稳定。在较低温度（22摄氏度）下完全耐药的植物中，持续高温至少9天会导致全身扩散和坏死症状。我们发现，持续的高温会破坏幼植株的这种抗性，但较老的接种植株很少出现全身性症状。Tsw基因的群体分离表明，Tsw位点的杂合性增加了接种幼苗发生系统性坏死症状的机会。遗传背景对抗性反应的热敏性影响较小。因此，在高温条件下，在Tsw基因座上培育纯合的品种更为理想。
The tomato spotted wilt virus resistance in pepper conferred by the Tsw gene is less stable at 32 degrees C continuous temperature. Continuous high temperatures for at least nine days lead to systemic spread and necrotic symptoms in plants that are totally resistant at a lower temperature (22 degrees C). We show that continuous high temperatures destabilize this resistance in young plants, but older inoculated plants rarely develop systemic symptoms. Populations segregating for the Tsw gene showed that heterozygosity at the Tsw locus increased the chance of inoculated seedlings to develop systemic necrotic symptoms. Genetic background was less significantly involved in the thermosensitivity of the resistant response. As a consequence, it would be preferable to grow cultivars homozygous at the Tsw locus in high temperature conditions.