| 摘要: |
| 【目的】明确甘肃陇南小麦条锈病常发易变区典型的持久抗病性品种里勃留拉和咸农4号苗期的抗条锈性特点及抗性机制。【方法】在抗性谱测定的基础上,采用CY21、CY23、CY27、CY29、CY30、CY31、CY32、Su-11、Su-14等9个条锈菌菌系,分别测定其苗期潜育期、侵染频率、夏孢子堆长度、产孢强度、产孢期以及严重度,同时将CY27∶CY30、CY27∶CY31、CY27∶CY32、CY31∶Su-4、CY30∶Su-11等5个等量混合菌系组合分别在里勃留拉和咸农4号上继代培养6代,测定各小种在组合中的比例变化。【结果】里勃留拉的抗性谱较宽,抗病性在小种间差异明显,而咸农4号对除CY18、CY22外的小种均感病;两者的抗病性组分在品种间、小种间以及品种×小种互作时均有显著差异;里勃留拉对不同菌系有较强的选择作用,而咸农4号的选择作用较弱。【结论】里勃留拉和咸农4号均具有不同程度的苗期抗病性,咸农4号对小种的聚合作用大于里勃留拉。 |
| 关键词: 小麦 条锈病 持久抗病性 里勃留拉 咸农4号 |
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| 基金项目:国家“十一五”科技支撑计划项目（2006BAD08A05）；陕西省“13115”科技创新工程重大科技专项（2006K02-G10-01）；教育部长江学者和创新团队发展计划项目（No.200558）；高等学校学科创新引智计划项目（No. B07049） |
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| Analysis on resistance to stripe rust of wheat varieties Libellula and Xiannong 4 at seeding stage |
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| Abstract: |
| 【Objective】 Libellula and Xiannong 4 are classic durable resistant varieties in Southern Region of Gansu Province where wheat stripe rust is serious.The study was done in order to reveal their seeding resistant characteristics and mechanism.【Method】 On the basis of determining their resistant spectrum,CY21,CY23,CY27,CY29,CY30,CY31,CY32,Su-11,Su-14 were used to investigate the resistant components at seeding stage,such as latent period,infection efficiency,uredinium length,sporulation capacity,period of spore production and severity．Also,two equal weight races' mixture CY27∶CY30,CY27∶CY31,CY27∶CY32,CY31∶Su-4,CY30∶Su-11 were continued to reproduce six generations of Libellula and Xiannong 4 respectively,and the ration changes of each race were tested. 【Result】 Libellula had different resistance to different races and Xiannong 4 was susceptible to all the races except CY18 and CY22.Resistant components had significant variances among different cultivars,races and cultivar×race.And Libellula had strong selection on different races,while the selection of Xiannong 4 was weaker than that of Libellula. 【Conclusion】 Libellula and Xiannong 4 had different certain seeding resistances to rust,and Xiannong 4 could converge more races than Libellula. |
| Key words: wheat stripe rust durable resistance Libellula Xiannong 4 |
