桉属种间杂种生长和抗青枯病的联合选择  

Selection of Growth and Bacterial Wilt Resistance in Eucalyptus Interspecific Hybrids

作　　者：李梅[1] 甘四明[1] 李发根[1] 吴坤明[1] 吴菊英[1] 禤瑞光 甘文友 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]广东省高要市林业局,广东高要526100

出　　处：《南京林业大学学报（自然科学版）》2007年第6期25-28,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金资助项目(30671703);国家高技术研究发展计划("863"计划)(2006AA100109)

摘　　要：为了培育速生、抗病的桉树杂种，通过苗期病原菌接种和大田试验，对以尾叶桉作母本、细叶桉等8个树种作父本的81个桉树种间杂种进行了生长和抗青枯病的联合选择研究。结果表明：尾叶桉与不同父本树种间杂种的存活率介于44．4％（尾叶桉×柳桉）～74．3％（尾叶桉×赤桉）；树高、胸径和材积3个生长性状在父本树种间差异不显著，父本树种内杂种间差异达0．05或0．01显著水平；抗病指数在父本树种间和父本树种内杂种间差异均达0．01显著水平；经选择，评选出13个速生、抗病的桉树种间杂种，平均材积为对照（母本尾叶桉的自由授粉家系）的101．58％～212．65％，平均抗病指数为对照的123．08％～184．60％。Selection of growth and bacterial wilt （pathogen Ralstonia solanacearum） resistance was carried out by nursery inoculation and field trial for 81 Eucalyptus interspecific hybrids. Among them, E. urophylla is as the female and the other eight species, e. g. ,E. tereticdmis etc, is as the male. Total survival in nursery and field examination varied with male parental species, ranging from 44.4% （E. urophylla×E. saligna） to 74.3% （E. urophylla× E. camaldulensis）. For the growth of traits height （H）, breast-high-diameter （DBH） and volume （V）, differences were at 0.05 or 0.01 level .among the hybrids within male parental species, but it is not significant among the male species. For bacterial wilt resistance index （RI） significant differences were found at 0. 01 level for both the male species and the hybrids within male species. Thirteen fast-growing and bacterial wilt resistant hybrids were selected out. Mean volume is 101.58%-212.65% of the control （three open-pollinating families of E. urophylla） and mean resistance 123.08% - 184.60% of the control indexes. This is valuable for further breeding of fast-growing and bacterial-wilt-resistant clones in Eucalyptus.

关 键 词：桉树杂种 生长 青枯病 选择 

分 类 号：S792.39[农业科学—林木遗传育种] S763.306.5[农业科学—林学]