| 摘要: |
| 【目的】从5年生69杨（从美洲黑杨中选育的优良无性系）天然杂种初选优良无性系对比试验林中选出抗溃疡病的杨树新品种。【方法】在杨树溃疡病高发期的7月中旬和9月下旬，调查每株无性系距地面0.3～1.8 m枝干上的病斑数及胸径，计算各个杨树无性系的感病率和感病指数。【结果】高度抗病的杨树无性系有03-南-2-21、03-北-27-1和03-北-3-1；抗病的无性系有03-南-5-11、03-南-1-13和03-南-4-24，高度感病的无性系有03-南-4-1、03-北-1-7、03-南-3-2和03-北-1-15。【结论】03-南-2-21可以成为速生抗病性好的杨树新品种。 |
| 关键词: 美洲黑杨 溃疡病 抗病性 |
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| 基金项目:国家“十二五”科技支撑专题“北方主要用材林寄主主导性病害控制技术”（2012BAD19B0801） |
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| Resistance of Populus deltoides clones to canker in field |
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SHI Yu-bo,FAN Jun-feng,LIANG Jun,et al
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| Abstract: |
| 【Objective】New Populus deltoids varieties with canker resistance were screened from 5-year natural hybrids of poplar.【Method】In middle July and late September when the emergence of Botryosphaeria canker was high,number of lesions on stem 0.3-1.8 meter high and diameter at breast height of each clone were measured.Then canker incidence and infection index of each clone were calculated. 【Result】Clones with high canker resistance included 03-south-2-21,03-north-27-1 and 03-north-3-1.Clones with low resistance included 03-south-5-11,03-south-1-13 and 03-south-4-24.Clones those were susceptible to canker included 03-south-4-1,03-north-1-7,03-south-3-2 and 03-north-1-15.【Conclusion】Clone 03-south-2-21 was the best variety with high canker resistance for fast-growing. |
| Key words: Populus deltoids cv. Botryosphaeria canker canker resistance |
