【作者】 黎海利；

【导师】 黄寿先；

【作者基本信息】 广西大学 ， 生态学， 2005， 硕士

【摘要】 本文研究了大叶栎优树选择的方法和标准以及优树子代测定的苗期试验部分,结果表明:(1)采用绝对生长量法进行优树初选是适合于大叶栎的,把木材基本密度、纤维长度、纤维长宽比、纤维壁腔比四个性状加入进行综合评分选择,可以提高选择的综合效率。(2)相关分析表明,优树生长与材性相关关系不显著;种子长与优树木材基本密度呈显著负相关关系;种子性状一定程度上可以反映优树子代苗期的表现。(3)苗期试验测定表明各组性状的变异系数均很大,方差分析结果,苗高除第三组外均达显著或极显著差异,叶片数各家系间均极显著差异,全株干重除第三组外均达显著以上水平。(4)苗高、地径、叶片数受中等以上遗传力控制,侧根数、侧根干重、须根干重、茎干重、叶干重、全株干重遗传力属中低水平,按10%的入选率进行选择,效果最好的为第一组。(5)多性状综合选择选出12个综合性状优良的家系。(6)一年生苗生长节律研究表明苗木一年均处于生长状态,无封顶期,其中5～7和8～9月为两个高峰,9月以后趋于缓慢。更多还原

【Abstract】 In the paper, Criteria and method of selecting elite trees of Casta nopsis fissa and progeny test were studied on. The results showed that:（1） Absolute value was suitable for selecting elite trees of Casta nopsis fissa primarily. Using tree growth increment、 fiber length、 ratio of fiber length to width、 ratio of fiber cell wall to cavity combined to select elite trees could improve the effect of selecting. （2）Correlation analysis showed that breast diameter and height increment per year had no significant relation with wood basic density while length of the seeds had significantly negative relation with it. Seedling properties could be reflected by the seed properties of elite trees to some degree. （3） Progeny test showed broad range of variance coefficient of different properties. Height of different families had significant relation with each other except group 3rd. Number of leaves were extremely significant relative among families in group 1st. The dry material of the whole seedling showed significant or extremely significant relation among families except that in group 3rd. （4） Heritability of height, ground diameter numbers of leaves was high. Numbers of lateral root, weight of dry lateral root, dry fibrous root, dry stem, dry leaves and the total dry material of the seedling were controlled by not high heritability. Selecting with 10% families, Effect of group 1^st was the best. （5） 12 superior families were chosen by multi-property combined method. （6） The rhythm of the height growth showed: the seedlings grew all the year. May to July and August to September were two peaks of growing though after September seedlings grew slowly.更多还原