种植区环境对燕麦种质成株期白粉病抗性的影响

Effect of planting area environment on resistanceto powdery mildew in oats germplasm

摘要:

为探究种植区环境对燕麦种质成株期白粉病抗性的影响,利用相对抗病指数分别对种植在甘肃省半干旱区(甘肃农业大学兰州牧草试验站)和二阴地区(通渭县华家岭镇)的28份燕麦资源在田间自然感病条件的白粉病成株期抗性进行了鉴定和评价。结果表明:28份材料中4641和99AS207在两个试验点均表现为高抗,4607、Rigdon、DA92-3F4、青永久252、青永久9和青永久98等6份材料在两个试验点均表现为中抗,但4628、伽利略和青永久307在牧草站表现高抗白粉病,在华家岭表现高感,而709、青永久316、青永久49在牧草站高感白粉病,在华家岭表现高抗;所有参试材料中以4628的相对抗病指数变化最大,在华家岭和牧草站分别为0和0.92。结果表明种植区环境对燕麦白粉病抗性有显著影响,参试材料在半干旱地区的病害平均严重度高于二阴地区。

Abstract:

The resistance of 28 oat materials were assessed and evaluated based on the relative disease resistance index with the method of naturally infection were used to explore the effect of planting area environment on resistance to powdery mildew in oat germplasm.The HuaJialing town of Dingxi city in Semiarid area and forage experimental station in Gansu agricultural university of Lanzhou city were selected as double shades areas of Gansu Province.The results showed that among the 28 materials in two planting area,the resistance of 4641 and 99AS207 in the two pilots showed little change and highly resistance.4607,Rigdon,DA92-3F4,Qingyongjiu-252,Qingyongjiu-9 and Qingyongjiu-98 were all showed stable medium resistance to the powdery mildew in two pilots,and other materials was unstable.But 4628,Galileo and Qingyongjiu-307 in the pasture station showed high resistance to powdery mildew,high performance in HuaJialing and 709,Qingyongjiu-316,Qingyongji-49 planted in the pasture station showed high-sensation to powdery mildew,high resistance in HuaJialing.The relative disease resistance index of 4628 was the greatest change among all the tested materials,0 and 0.92 at Huajialing and Forage Station respectively.These results illustrated that planting area environments had a significant impact on the resistance to powdery mildew in oats,the average severity of the oat material planted in the pasture station is higher than that planted in the Hua Jialing.