山西省不同生态区小麦白粉病菌毒性监测研究

Monitoring of the virulence of Erysiphe graminis f.sp.tritici in different ecological areas of Shanxi Province

摘要: 对山西省不同生态区61个小麦白粉病菌株毒性基因频率测定结果表明，Pm2、Pm4a、Pm4b、Pm13、Pm20、PmXBD、Pm2+6、Pm4+8、Pm2+Mli、Pm4b+Mli和Pm5+6为山西省小麦白粉病菌的有效抗病基因，可供转育利用；Pm6、Pm21、Pm2+Ta和Pm1+2+9有一定利用价值；而Pm1、Pm3a、Pm3d、Pm3f、Pm17和Pm19则利用价值较小；Pm3b、Pm3c、Pm3e、Pm5、Pm7和Pm8单独使用无利用价值。并对各毒性基因在不同生态区出现频率进行排序，筛选出不同生态区小麦白粉病菌共有的优势毒性基因。

Abstract: The frequencies of virulence genes for 61 isolates of Erysiphe graminis f.sp.triticifrom different ecological areas of Shanxi Province were monitored.The results show that pm2,Pm4a,Pm4b,Pm13,Pm20,PmXBD,Pm2+6,Pm4+8,Pm2+Mli,Pm4b+Mli and Pm5+6 are effective resistant genes to Erysiphe graminis f.sp.tritici and may be applicated as resistant parents;Pm6,Pm21,Pm2+Ta and Pm1+2+9 have applicable values in some extent;Pm1,Pm3a,Pm3d,Pm3f,Pm17 and Pm19 are little applicable value in breeding;Pm3b,Pm3c,Pm3e,Pm5,Pm7 and Pm8 have no applicable values in breeding if they are utilized as the only resistant sources.Finally,the virulence frequencies are arranged in order and the common prevailing virulent genes in different ecological areas are selected.