尾叶桉抗病无性系的筛选研究

Study on the Selection of E.urophylla Clone of Disease Resistance

使用WFT接种法、喷雾法接种法测定尾叶桉无性系抗青枯病和焦枯病性能。测定的10个无性系结果表明,只有GLU4为抗病无性系,其青枯病和焦枯病的发病率分别为2%和2.67%。综合评价抗病能力排序前两名的无性系是GLU4和GLU1。培育GLU4和GLU1苗木在4个不同自然条件下的区域进行造林,其自然抗病结果:抗病GLU4在高风险发病区和中风险发病区几乎没有青枯病和焦枯病病情发生,GLU1在高风险发病区栽培,两病的发病率分别为23.07%和24.69%,而在中风险发病区两病的发病率分别只有0.028%和0.039%。

Resistance capacity of bacterial wilt and dieback of E. urophylla clones was measured by WFT inoculation method and spraying inoculation method. The tested 10 clones prove that, only GLU4 is the disease-resistant clone with the incidence of bacterial wilt and dieback 2 % and 2.67 % respectively. Top two best disease-resistant clones are GLU4 and GLU 1 after comprehensive evaluation. The disease-tolerant results in 4 different areas of plantation with GLU4 and GLU1 showed that, in areas of high and mid-level risk of disease incidence, bacterial wilt and dieback rarely happened for GLU 4; as for GLU1, in area of high risk of disease incidence, the rates were 23.07 % and 24.69 % respectively, whereas in area of mid-level risk of disease incidence, the disease incidence rates were only 0. 028 % and 0. 039 % respectively.