桉树无性系组织比量特征差异分析  

A Study on the Difference of Wood Tissue Proportion of Eucalyptus Clones

作　　者：卢翠香[1] 苏远玉 郭东强[1] 李昌荣[1] 孙熹 李建凡 陈健波[1] Lu Cuixiang;Su Yuanyu;Guo Dongqiang;Li Changrong;Sun Xi;Li Jianfan;Chen Jianbo(Guangxi Forest Research Institute!Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning 530002;Guangxi State-owned Qinlian Forest Farm,Qinzhou Guangxi 535099;Yulin Forestry Research Institute,Yulin Guangxi 537501)

机构地区：[1]广西林业科学研究院/广西优良用材林资源培育重点实验室,南宁530002 [2]广西国有钦廉林场,广西钦州535099 [3]玉林市林业科学研究所,广西玉林537501

出　　处：《中国农学通报》2021年第22期42-48,共7页Chinese Agricultural Science Bulletin

基　　金：广西科技重大专项“桉树用材林质量精准提升关键技术研究与集成示范”(桂科AA17204087-6);广西林业科技项目“大花序桉高效栽培技术集成”(桂林科字[2016]第2号)。

摘　　要：为了解桉树无性系木材组织比量变异规律,提高桉树材性的遗传改良效率。以生长在广西玉林的11个桉树无性系为试验材料,采用生物解剖学方法,对导管比量、轴向薄壁细胞比量、射线比量和纤维比量进行测定。结果表明,无性系间导管比量、轴向薄壁组织比量、射线比量和纤维比量差异极显著。随树龄的增加,导管比量先递增,第5年开始略有降低;轴向薄壁组织比量开始迅速下降,第7年后迅速上升,后又降低;射线比量呈逐渐增加趋势,中间有小幅波动;纤维比量呈减小趋势,中间有小幅波动。导管比量、轴向薄壁组织比量和射线比量采用多项式方程拟合效果较好,R^(2)分别为0.8655、0.7263、0.6130;纤维比量采用对数方程和乘幂式方程拟合效果较好,R^(2)分别为0.8172和0.8154。桉树无性系组织比量受较强的遗传控制,各指标重复力均在0.90以上,开展无性系组织比量遗传改良是可行的。The difference of wood tissue proportion of eucalyptus clones was studied to improve the efficiency of genetic improvement of wood properties. 11 clones from Guangxi Province were chosen as sampling materials, the vessel proportion, axial parenchyma proportion, ray proportion, fiber proportion were measured by biological anatomy methods. The results show that there are significant differences in the vessel proportion,axial parenchyma proportion, ray proportion, and fiber proportion among the clones. The vessel proportion increases with the increase of tree age and then decreases slightly at the 5^(th) year. The axial parenchyma proportion decreases rapidly at first, rises rapidly after the 7^(th) year, and then decreases again. The ray proportion increases annually and the fiber proportion decreases with the increase of tree age. The vessel proportion, axial parenchyma proportion, and ray proportion are well fitted by polynomial equation(R^(2)=0.8655,0.7263, 0.6130). The fiber proportion is well fitted by logarithmic equation and power equation(R^(2)=0.8172,0.8154). The tissue proportion of eucalyptus clones is under strong genetic control, and the repeatability of each index is above 0.90. It is feasible to carry out genetic improvement of clone tissue proportion.

关 键 词：桉树无性系 组织比量 无性系间变异 径向变异 遗传参数 

分 类 号：S781.1[农业科学—木材科学与技术]