论文部分内容阅读
研究对2008年采自黑龙江省4个地点83个马铃薯晚疫病菌株进行了生理小种类型的鉴定。结果表明,小种3.4.7.11出现频率达33.73%,出现频率最高,分布最广,是2008年黑龙江省的优势小种。从小种的组成来看,复合型毒力基因生理小种占据了主导地位,小种3.4.5.6.7.8.9.10.11含有的毒力基因数目最多,单毒力基因的生理小种只有3号小种,同时也发现了不含毒力基因的0号小种。从小种的毒力基因组成来看,毒力基因vir3、vir4、vir7、vir11出现频率较高,均达50%以上,分布广泛,其次为毒力基因vir8和vir10,而vir5和vir9出现频率低,低于30%,没有发现vir1、vir2毒力基因。牡丹江和海伦的小种组成比较复杂,加格达奇和哈尔滨的小种较为简单。
Eighty-eight isolates of Phytophthora infestans from four locations in Heilongjiang Province were identified as ecotypes. The results showed that the emergence frequency of 3.4.7.11 was 33.73%, the frequency of emergence was the highest and the distribution was the widest. It was the dominant race in Heilongjiang Province in 2008. From the perspective of the composition of races, the composite virulence races dominated. The races of races 3.4.5.6.7.8.9.10.11 contained the largest number of virulence genes and the raccoon only Race, but also found no virulence gene No. 0 races. Virulence genes virulence genes vir3, vir4, vir7, vir11 appear higher frequency, were more than 50%, widely distributed, followed by the virulence genes vir8 and vir10, and vir5 and vir9 frequency of occurrence is low , Less than 30%, vir1, vir2 virulence genes were not found. The races of Mudanjiang and Helen are more complex, and the races of Jiagedaqi and Harbin are relatively simple.