对9个不同种源的巨桉进行了桉树枝瘿姬小蜂自然侵害后的受害情况、生长性状和干形调查,结果表明:不同种源的受害程度不同,其中,种源南非1/SAG-TER1受害最为严重,种源南非6/SAG-URO受害最轻;不同种源的生长性状表现出显著差异,种源南非6/SAG-URO的树高、胸径、冠幅等指标均最大,且与种源16892和17907有显著差异;不同种源间巨桉树干通直度、圆满度无显著差异,分枝状况有细微的差异,分枝角度有显著差异。相关性分析表明:不同种源巨桉生长性状和干形性状之间呈显著或极显著相关,幼林树高与受桉树枝瘿姬小蜂侵害状况之间呈显著负相关。通过对不同种源的巨桉进行综合分析评价,种源南非6/SAG-URO的抗性最优,可以作为后续抗性选育的优良种源。
The growth,stem form and resistance to Leptocybe invasa of 9 provenances of Eucalyptus grandis were investigated.The results show that the resistance to Leptocybe invasa among 9 provenances was different,provenance SOUTH AFRIC 1/SAG-TER1 was the most sensitive and provenance SOUTH AFRIC 6/SAG-URO was the most insensitive.The growth traits had significant differences among different provenances,provenance SOUTH AFRIC 6/SAG-URO was the biggest and had significant differences with provenance 16892 and 17907.There was no significant difference of stem straightness and stem fullness among 9 provenances,but slight difference of branch status and significant differences of branching angle.The correlation analysis showed that there was significant or extremely significant correlation between growth traits and stem form traits,the correlation between tree height and damage situation was significantly negative correlation.According to the comprehensive analysis of Eucalyptus grandis provenances,provenance SOUTH AFRIC 6/SAG-URO has the best resistance to Leptocybe invasa and could act as superior provenances for the future resistance breeding.
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