赤皮青冈生长性状多样性与不同生长类型适应性研究

Study on the Genetic Diversity of Growth Character and Adaptability Growth of the Different Genetic Growth-type of Cyclobalanopsis gilva

该研究以建瓯市龙村乡天然分布的赤皮青冈母树采集的种子培育的苗木为实验材料,应用大样本数据和正态分布标准差分类法等数据处理方法,以标准差为临界值对赤皮青冈的二年生苗木高与地径的不同生长类型进行分类,探讨了赤皮青冈苗木群体高与地径生长类型表现。结果表明,群体表现明显的早期生长分化,群体平均值与相邻两区间生长类型个体权重占整体的85%以上,好与差类型的两极分化所占比例较小;通过不同生长类型分类可以较好地了解群体生长性状多样性组成和优势生长类型,可为优良生长类型筛选提供依据。对不同生长类型个体适应性研究表明,该树种生长类型差的个体高生长期较短,优良生长类型个体有更长的高生长期,但地径生长期基本是一致的,主要受高生长期与光合作用率影响,说明遗传品质影响苗高与地径生长。

Taking the natural distribution of Cyclobalanopsis glauca in Dongfeng town of Jian＇ou City as the experimental material,the growth of the seedling colony was classified into 8 types with the deviation critical value to classify the different genetic-type for the seedling of height and caliper of Cyclobalanopsis gilva through using＂the standard deviation classification method＂and large sample in this paper.The results indicated that the differentiation of seedling colony was remarkable in early stage and the weigh of growth types of mean and adjacent interval was over85%and the polarization ratio of the fine and sick growth was smaller in total and the diversity of the constitute of colon and the dominant growth-type were well disclosed through the classification of the different growth-type with＂the standard deviation classification method＂,it will provide theory for selecting the excellent growth-type.The adaptability growth of the different growth-types were studied and that it indicated that growth period of excellent growth-type comparing with the inferior growth-type is longer,but growth period of caliper of the different growthtype was essentially the same.It indicated that the different growth-types of the seedling of Cyclobalanopsis gilva will influence the growth of caliper and height of Cyclobalanopsis gilva.