| 摘要: |
| [目的]为生产上应用品种混种防治小麦条锈病提供依据.[方法]于2003～2004年和2004～2005年在田间自然发病条件下,比较了繁19、引11-12、川麦107、靖麦10号、青春55、46548-3和安96-8这7个小麦品种单种,及在感病品种繁19的基础上依次加入上述其余6个品种分别形成组分为2～7的小麦品种混种群体后,条锈病的发生程度.[结果]不同小麦品种混种的条锈病病情指数与其组分单种病情指数的平均数相比,平均减少57.7%,减少幅度为37.2%～72.2%.在2003～2004年,不同小麦品种混种群体的条锈病病害防治效应显著性都不高,但在2004～2005年,包含4、6、7个组分的小麦品种混种群体的条锈病病害防治效应均为显著(P<0.05),包含3、5个组分的小麦品种混种群体的条锈病病害防治效应也比较显著(P<0.10).对于2005年试验资料作进一步分析发现,小麦品种混种群体的条锈病病害防治效应,有随组分数目的增加而提高的趋势.[结论]利用品种混种可以使小麦条锈病的病情指数降至一定程度. |
| 关键词: 品种混种 小麦条锈病 组分数目 品种多样性 |
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| 基金项目:国家“973”计划项目（200611D100203）；国家“十一五”科技支撑计划项目（2006BAD08A05）；教育部长江学者和创新团队发展计划项目（IRT0558）；高等学校学科创新引智计划项目（B07049） |
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| Effect of wheat cultivar mixtures on severity of stripe rust |
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| Abstract: |
| 【Objective】 The study was to offer basis for the use of cultivar mixtures for control of wheat stripe rust in commercial production.【Method】 Disease indexes of stripe rust (Puccinia striiformis f.sp. tritici) in seven wheat cultivars-including Fan19,Yin11-12, Chuanmai107,Jingmai10,Qingchun55,46548-3 and An96-8-in monoculture and their six mixtures of 2-7 components formed by adding in turn Yin11-12, Chuanmai107, Jingmai10,Qingchun55,46548-3 and An96-8 on the base of susceptible Fan19 were compared in natural infection of the pathogen in 2003－2004 and 2004－2005 respectively.【Result】 The decrease in disease index of stripe rust in wheat mixtures over their component means was 57.7% on average,ranging from 37.2% to 72.2%.No significant difference between expected and observed disease indexes at P=0.10 level of probability was observed for the six mixtures in 2003－2004;however,this significant difference observed from five out of the six mixtures in 2004－2005,especially for 4-component,6-component and 7-component mixtures.Further studies on data collected in the second trial year showed that there was a trend towards greater mixture effect on disease from increased number of components.【Conclusion】 Cultivar mixtures proved to be used for controlling stripe rust in wheat to some degree. |
| Key words: cultivar mixture Puccinia striiformis f.sp.tritici component number variety diversity |
