| 摘要: |
| 【目的】研究小偃54抗条锈性的遗传规律，为小麦抗条锈病基因的利用奠定基础。【方法】在温室以小偃54和感病品种铭贤169的杂交后代F1、BC1、F2和F3群体为研究对象，采用我国目前小麦条锈菌流行小种Su-4、Su-11、CYR29、CYR30、CYR31、CYR32和CYR33 7个小种对供试群体进行温室苗期和成株期测试，并分析杂交后代抗病基因的遗传规律。【结果】在苗期和成株期，小偃54在常温（夜10 ℃/昼18 ℃）条件下对7个流行小种均表现感病，而在高温（夜18 ℃/昼25 ℃）条件下则表现出较好的抗条锈性；小偃54对CYR29的抗条锈基因由2对相互抑制的基因控制，对CYR30、CYR31和CYR32的抗条锈基因由2对隐性基因控制。【结论】小偃54是一个典型的高温抗条锈小麦品种，并明确了其对条锈菌流行小种表现高温抗病性的基因数、显隐性和遗传方式。 |
| 关键词: 小偃54 小麦条锈病 高温抗条锈性 遗传分析 |
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| 基金项目:公益性（农业）行业科技专项 (200903035 02)；高等学校学科创新引智计划项目（B07049）；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（2014ZDKG-08） |
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| Inheritance analyses of high-temperature resistance to stripe rust in Xiaoyan 54 |
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| Abstract: |
| 【Objective】The research was to study the inheritance of resistance to stripe rust in xiaoyan54,which lays a foundation of utilization for the gene of wheat resistance to stripe rust.【Method】Xiaoyan 54 was crossed with Mingxian 169,a winter wheat genotype susceptible to 7 prevalent Chinese races of Puccinia striiformis f.sp.tritici.Seedlings and adult plants of the parents and F1,BC1,F2 and F3 progeny were tested with Chinese race under controlled greenhouse conditions.【Result】Xiaoyan 54 is susceptible to all Chinese races under normal temperature in seedling and adult plants but resistant to all races under high temperature in seedling and adult-plant stage.Xiaoyan 54 has two mutual inhibition of resistance genes to CYR29,two recessive resistance genes to CYR30,CYR31 and CYR32.【Conclusion】The results clarified expression of high temperature resistant gene number,dominant or recessive of resistant genes and genetic mode of Xiaoyan 54 to prevalent race of PST. |
| Key words: Xiaoyan 54 stripe rust high-temperature resistance genetic analysis |
