木果柯功能性状的种内变异及其与遗传·环境和个体发育的关系  

Intraspecific Variation in Functional Traits of Lithocarpus xylocarpus and Its Relationship with Genetic,Environment and Ontogeny

作　　者：潘霞 姚志良 杨欣 田佳玉 林露湘[1,5] 李巧明 PAN Xia;YAO Zhi-liang;YANG Xin(CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming,Yunnan 650223;University of Chinese Academy of Sciences,Beijing 100049;College of Ecology and Environment,Hainan University,Haikou,Hainan 570228)

机构地区：[1]中国科学院西双版纳热带植物园热带森林生态学重点实验室,云南昆明650223 [2]中国科学院大学,北京100049 [3]海南大学生态与环境学院,海南海口570228 [4]云南大学生态与环境学院暨云南省高原山地生态与退化环境修复重点实验室,云南昆明650500 [5]云南西双版纳森林生态系统国家野外科学观测研究站,云南勐腊666303

出　　处：《安徽农业科学》2023年第4期105-111,117,共8页Journal of Anhui Agricultural Sciences

基　　金：NSFC-云南省联合基金(U1902203);中国科学院战略性先导科技专项(B类)(XDB31000000)。

摘　　要：依托哀牢山按公里网格布设的20个亚热带常绿阔叶林1 hm^(2)动态样地,选取样地内所有胸径(Diameter at breast height,DBH)≥10 cm的木果柯(Lithocarpus xylocarpus)个体作为研究对象,测量其6个功能性状(叶面积、比叶面积、叶片厚度、叶干物质含量、叶绿素含量和枝条木质密度),利用基于距离矩阵的多元回归解析遗传变异、环境距离、个体发育阶段差异对木果柯功能性状种内变异的相对作用。结果表明:木果柯的功能性状均存在不同程度的种内变异,叶面积变异最大,其次是比叶面积和叶片厚度,木质密度、叶干物质含量和叶绿素含量变异较小;对种内变异程度最大的叶面积来说,个体发育阶段差异的正效应最强,其次是遗传变异,环境距离的正效应最弱;遗传变异对叶绿素含量种内变异的正效应在所有性状中最强,而环境距离对比叶面积的正效应在所有性状中最强。In this study,all individuals of Lithocarpus xylocarpus with diameter at breast height(DBH)≥10 cm in 201 hm^(2)subtropical evergreen broad-leaved forest dynamic plots established among the grid of 1 km 2 in Ailao Mountains,were sampled to measure six functional traits(leaf area,specific leaf area,leaf thickness,leaf dry matter content,chlorophyll content and branch-wood density).The effects of genetic variation,environmental distance,and ontogenetic stage differences on intraspecific variation of functional traits of L.xylocarpus were analyzed by using multiple regression on distance matrices.The results showed that there was different degree of intraspecific variation for the six functional traits of L.xylocarpus,with the greatest variation in leaf area,followed by specific leaf area and leaf thickness,the less variation in branch-wood density,leaf dry matter content and chlorophyll content.For leaf area with the highest degree of intraspecific variation,the positive effect of ontogenetic stage difference was the strongest,followed by genetic variation,and environment distance was the weakest.The positive effect of genetic variation on intraspecific variation of chlorophyll content was the strongest among all the six functional traits,while the positive effect of environmental distance on leaf area was the strongest.

关 键 词：遗传变异 环境距离 基于距离矩阵的多元回归 亚热带常绿阔叶林 哀牢山 

分 类 号：S718[农业科学—林学]