尾叶桉育种园矮化促花研究  

Study on Dwarfing and Flower Promoting in Eucalyptus urophylla Breeding Garden

作　　者：杨晓慧[1] 张卫华[1] 潘文[1] 徐放[1] 廖焕琴 陈新宇 杨会肖[1] YANG Xiaohui;ZHANG Weihua;PAN Wen;XU Fang;LIAO Huanqin;CHEN Xinyu;YANG Huixiao(Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China)

机构地区：[1]广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东广州510520

出　　处：《林业与环境科学》2021年第6期38-44,共7页Forestry and Environmental Science

基　　金：广东省林业科技创新项目(2016KJCX002、2019KJCX003)。

摘　　要：尾叶桉Eucalyptus urophylla是桉树重要的杂交亲本优选树种,因其树干高大,给花粉收集、人工控制授粉等工作带来了极大的不便。如何通过多效唑处理实现尾叶桉育种园亲本矮化、促进亲本开花是研究拟解决的主要问题。研究以育种园内修剪矮化的尾叶桉亲本为试验材料,对多效唑施加量、施加次数、施加方式等的矮化促花效果进行了研究。结果显示,处理16,即2019年11月1次根施2 g多效唑的花枝数量为38,花苞数量为300,综合评价值为0.55,为最佳施用方式。Eucalyptus urophylla is an important hybrid parent preferred tree species for Eucalyptus.However,its tall trunk during flowering brings great inconvenience to pollen collection and control of pollination.How to improve the flowering and fruiting efficiency of E.urophylla through chemical treatment is the main problem to be solved in this research.In this study,the pruned and dwarfed E.urophylla clones in the breeding garden were used as experimental materials to study the dwarfing and flower promotion effects of paclobutrazol application amount,application times and application methods.The results showed that treatment 16(1 root application of 2 g paclobutrazol in November 2019)has 38 flower branches,300 flower buds,and a comprehensive evaluation value of 0.55,which is the best application method.

关 键 词：尾叶桉 多效唑 矮化 促花 

分 类 号：S722.5[农业科学—林木遗传育种]