小麦抗白粉病种质“91(260)3-3-8”的抗性鉴定及遗传分析  

Identification and Genetic Analysis of the Resistance of the Wheat Germplasm "91(260)3-3-8" to Powdery Mildew

作　　者：陈永华[1] 柴守诚[1] 郑炜君[1] 杨蓓蓓[1] 宿俊吉[1] 韩小美[1] 

机构地区：[1]西北农林科技大学农学院,陕西杨陵712100

出　　处：《西北植物学报》2005年第11期2310-2313,共4页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家863项目(2003AA207100);国家863重大专项(2002AA207004)

摘　　要：本试验对91(260)3-3-8对白粉病的抗性再次进行鉴定,进一步确定该材料对白粉病完全免疫.为了研究其抗白粉病基因的遗传规律,用感病材料陕225、小偃6、邯6172、豫麦49与该材料杂交得到F1、F2后代群体,发现F1抗白粉病;陕225/91(260)3-3-8F2、小偃6/91(260)3-3-8 F2、邯6172/91(260)3-3-8 F2群体抗感比例为3∶1,表明“91(260)3-3-8”与感病材料陕225、小偃6、邯6172相比有1对抗白粉病基因的差异;豫麦49/91(260)3-3-8 F2群体抗感比例不完全符合3∶1,其原因有待于进一步探明.This study identified the resistance of 91 （260）3-3-8 to powdery mildew once again and further confirmed that the material was immune to powdery mildew. On purpose of understanding its genetic pattern of the resistance gene to powdery mildew, the material was used to cross Shaan 225,Xiaoyan 6, Han 6172 and Yumai 49, susceptible material; their F1 plants were found to be resistant to powdery mildew,and the ratio of resistant plants to susceptible plants was 3 ： 1 in F2 generations of Shaan 225× 91 （260）3-3-8,Xiaoyan 6× 91 （260）3-3-8,Han 6172× 91 （260）3-3-8;and this indicated that there a difference of one pair of powdery mildew-resistant genes between 91（260）3-3-8 and the susceptible materials,Shaan 225,Xiaoyan 6 and Han 6172. The ratio of resistant plants to susceptible plants was completely not 3 ： 1 in F2 generation of Yumai 49 × 91（260）3-3-8 and the reason for this needed to be further explored.

关 键 词：小麦 白粉病 遗传分析 

分 类 号：Q32[生物学—遗传学] S435.121.46[农业科学—农业昆虫与害虫防治]