不同地理种源侧柏对侧柏绿胶杯菌抗性的测定试验

THE EXPERIMENT OF DIFFERENT PLATYCLADUS ORIENTALIS PROVENANCES RESISTANCE TO CHLOROSCYPHA PLATYCLADUS SP NOV

收集侧柏２１个种源，经繁育定植后，连续３年逐年测定其对侧柏绿胶杯菌的抗性。其分析结果表明，不同地理种源侧柏之间其生长状况的优劣与抗病性关系不大，同一种源内生长势良好者其感病指数较轻；种源之间对绿胶杯菌的抗性存在有明显的差异，其中抗性较强的有河北民寿、山西晋城、贵州黎平、山西交城和陕西华阴种源，但是均未达到可以用以进行病害防治的高度抗病的程度。

Platycladus orientalis geogrphic provenaces resistance to Chloroscypha platycladus sp. nov. has been studied for 3 years and the results show that there is no significant correlative variation between their increment and resistance, the increments variation among these provenances depends on their genetic characteristics. In the same provenance, the stands which grow better have stronger resistance at the same time. There is an outstanding difference among their resistance, of which some provenances, such as Hebai Minshou, Shanxi Jincheng, Guizhou Liping, Shanxi Jiaocheng and Shanxi Huayin, have stronger resistance to Chloroscypha platycladus sp. nov., but all of them could not be used for this diseaseproof provenance.