俄罗斯马铃薯资源在黑龙江省的晚疫病田间自然抗性评价

Evaluation of Russian Potato Germplasm for Potato Late Blight Resistance in Heilongjiang Field Conditions

利用马铃薯晚疫病田间自然抗性评价标准,于2005年和2006年在黑龙江省马铃薯晚疫病常年发生区克山县,对来自俄罗斯和我国的共24份马铃薯材料进行了两年的晚疫病田间自然抗性鉴定。结果表明:2005年表现抗病的材料有13份,2006年抗病材料有6份,两年均表现抗病的材料共5份;来自俄罗斯的抗病材料较国内的抗病材料所占比例较高。2006年抗晚疫病材料数量的下降,与晚疫病菌毒力基因类型发生变化有关。

A total of 24 potato cuhivars （clones） from Russia and China were evaluated for potato late blight （Phytophthora infestans） resistance in Keshan, Heilongjiang province,where the disease occurred frequently in field conditions during 2005 -2006. In 2005,13 cuhivars （clones） showed resistance ;whereas in 2006 ,only 6 cuhivars （clones） were resistant. 5 cultivars （clones） represented consistently resistant in both years, i. e. Kexin 16, Ke97GS-4,Никульский,Гибрид128-6 and Гибрид 591m-69 Russian cuhivars had got of higher resistance percentage than Chinese ones. The resistance decrease in 2006 might due to the changes of virulent factors compared with that in 2005.