文献类型：期刊文献

中文题名：柚木种源/家系种子表型变异及其与环境因子的相关性

英文题名：Phenotypic Variation of Tectona grandis Provenances/Families Seeds and the Correlation with Environmental Factors.

作者：李昆亮[1,2] 黄桂华[2] 宋希强[1] 梁坤南[2] 王先棒[2] 潘栋康[2] 周文龙[2] 韩强[2]

第一作者：李昆亮

机构：[1]海南省热带特色花木资源生物学重点实验室/海南大学热带农林学院,海南海口570228;[2]中国林业科学研究院热带林业研究所,广东广州510520

年份：2024

卷号：45

期号：8

起止页码：1596-1604

中文期刊名：热带作物学报

外文期刊名：Chinese Journal of Tropical Crops

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD_E2023_2024】；

基金：林业和草原科技成果国家级推广项目(No.2020133113);广东省林业局项目“柚木适生耐寒种质资源收集保存与扩繁利用”。

语种：中文

中文关键词：柚木;种子;表型变异;环境因子;相关性

外文关键词：teak(Tectona grandis L.F.);seed;phenotypic variation;environmental factors;correlation

分类号：S722.5

摘要：通过研究柚木(Tectona grandis L.F.)不同种源、家系种子的表型性状,揭示柚木种子遗传变异规律及其对环境因子变化的响应机制,促进柚木种质资源保护和遗传改良。以广东、广西、海南和云南4个省(区)13个种源81个柚木家系种子为材料,测定种子长度、宽度、长宽比、长宽积和百粒重5个性状。结果显示:(1)柚木种子的5个表型性状在种源及家系间均存在极显著差异(P<0.01),不同家系各性状变异系数为10.27%~23.88%,不同种源各性状变异系数为4.21%~20.32%。(2)各表型性状间呈极显著相关关系,不同环境因子对种子性状的影响程度不同,经纬度、海拔、年降水量是影响柚木种子性状的主要因子,其次是年均温,年均相对湿度的影响相对较小。不同的种子性状对环境因子变化的响应也不相同,种长、种宽和长宽积对年降水量的响应最为敏感,而长宽比和百粒重则对纬度的响应最为敏感。(3)聚类分析将13个种源分为3类。柚木种子在种源和家系间均存在丰富的表型变异,种子性状受母本遗传和地理气候因子等多因素影响。研究结果为柚木多样性种质资源保护和利用提供理论基础和科学依据。
Through the examination of the phenotypic traits of teak(Tectona grandis L.F.)seeds from diverse prove-nances and pedigrees,this study elucidated the genetic variability patterns of teak seeds and the mechanisms of response to environmental factor fluctuations,thereby fostering the conservation and genetic improvement of teak germplasm resources.Using seeds from 81 teak pedigrees representing 13 provenances across four provinces(Guangdong,Guangxi,Hainan,and Yunnan)as the experimental material,five traits,namely seed length,width,length-width ratio,length-width product,and hundred-seed weight,were quantified.Significant differences(P<0.01)existed among the five phenotypic traits of teak seeds across provenances and pedigrees,with trait variation coefficients ranging from 10.27%to 23.88%among different pedigrees and from 4.21%to 20.32%among different provenances.Substantial cor-relations prevailed among various phenotypic traits,with varying degrees of influence on seed traits from different en-vironmental factors.Latitude,altitude,and annual precipitation were the primary determinants affecting teak seed traits,followed by annual average temperature,while the impact of annual average relative humidity was relatively minor.Distinct seed traits also exhibited heterogeneous responses to environmental changes,with seed length,seed width,and length-width product being particularly sensitive to annual precipitation,whereas length-width ratio and hundred-seed weight manifested heightened sensitivity to latitude.Cluster analysis categorized the 13 provenances into three classes.Teak seeds manifest prolific phenotypic variation across provenances and pedigrees,with seed traits being influenced by various factors,including maternal inheritance and geographical climate.The research would provide a theoretical foundation and scientific basis for the conservation and utilization of diverse teak.