抗日本松干蚧松树种间自然杂种选择及应用的研究

SELECTION AND APPLICATION OF THE NATURAL PINE HYBRIDS RESISTANT TO MATSUCOCCUS MATSUMURAE KUWANA

通过对黑松、赤松、油松及其种间自然杂种的形态特征和生长特性比较、主分量分析及过氧化物酶同功酶分析，在日本松干蚧疫区，选择出“黑赤松”和“黑油松”两类种间自然杂种，它们的胸径、树高生长量均高于同龄父、母本和对照（樟子松）的３８％以上。１０龄左右种间自然杂种的松干蚧危害表症率为０，而对照油松、赤松则分别为２２．９２％和３０．７７％。该２杂种的引种范围可达辽宁中部和东部。

To identify hybrid vigour how to resist insect damage, a research project was carried out with Pinus thunbergii,p. densiflora,P. tabulaeformis and some natural hybrids between these species in the areas where Matsucoccusmatsumurae Kuwana had occurred through comparison in morphology and growth,PCA and peroxidase isozyme analysis. Two hybrid types, 'black densiflora'and 'black tabulaeformis', Were selected. Ten-year old trees of these two hybrid types were at all not attacked by the insect, in contrast, P.tabulaeformis and P. densiflora, which were used as control in the experiment, were damaged at rates 22.9% and 30.7% respectively. These two hybrid typesselected could be extended for commercial plantings to the central and eastern parts of Liaoning Province, China.