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摘要: 随着杨树Populus spp.育种工作的发展,出现许多新的品种和无性系。为进一步研究其抗病性,采用相对抗病指数针对57个杨树种、品种(无性系)对叶锈病Melampsora rostrupii抗性进行了调查和分析。结果表明:供试的57个树种、品种(无性系)对杨树叶锈病的抗性表现出很大的差异,发病率为0 ~ 100%,病情指数为0 ~ 82.1,相对抗性指数为0 ~ 100;18个种、品种(无性系)表现为高抗,占供试总数的31.58%;6个种、品种(无性系)表现为中抗,占供试总数的10.53%;15个种、品种(无性系)表现为低抗,占供试总数的26.32%;10个中度感病种、品种(无性系),占供试总数的17.54%;8个高度感病种、品种(无性系),占供试总数的14.04%。不同杂交组合的相对抗性指数差异显著,同一杂交组合的不同种、品种(无性系)间抗性出现明显的分化。表4参18Abstract: Many new cultivars and clones followed stock breeding of poplar. Here,resistance to a leaf rust Melampsora rostrupii with 57 poplar species or cultivars was studied using a pathogenic index and a confrontational index. Results revealed strong differences among the 57 hybrid poplars for resistance to the leaf rust. The incidence rate was 0 - 100% with a disease index of 0 - 82.1 and a confrontational phase index of 0 - 100. For poplar species or cultivars (clones) 18 (31.6%) showed high resistance to the rust,6 (10.5%) showed mid-resistance,15 (26.3%) showed low resistance,10 (17.5%) showed mid-susceptibility,and 8 (14.0%) showed high susceptibility. Thus,different poplar hybrid combinations from the same cross showed diversity in resistance to this leaf rust.[Ch,4 tab. 18 ref.]
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Key words:
- forest protection /
- poplar /
- Melampsora rostrupii /
- resistance
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.02.015

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