生物技术通报 ›› 2016, Vol. 32 ›› Issue (10): 212-218.doi: 10.13560/j.cnki.biotech.bull.1985.2016.10.026

• 研究报告 • 上一篇    下一篇

杉木无性系耐旱分析及SRAP种质鉴别

苏艳1, 张亦弛1, 胡德活2, 郑会全2   

  1. 1. 华南农业大学林学与风景园林学院,广州 510642;
    2. 广东省林业科学研究院 广东省森林病虫害生物防治重点实验室,广州 510520
  • 收稿日期:2016-05-31 出版日期:2016-10-25 发布日期:2016-10-12
  • 作者简介:苏艳,女,实验师,研究方向:林木生理生态;E-mail:suyan@scau.edu.cn
  • 基金资助:
    林业公益性行业科研专项经费(201404127),“广东特支计划”科技创新青年拔尖人才项目(2014TQ01N140),华南农业大学教改项目

Drought-tolerance Analysis and SRAP-based Germplasm Identification of Chinese Fir Clones

SU Yan1, ZHANG Yi-chi1, HU De-huo2, ZHENG Hui-quan2   

  1. 1. College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642;
    2. Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest,Guangdong Academy of Forestry,Guangzhou 510520
  • Received:2016-05-31 Published:2016-10-25 Online:2016-10-12

摘要: 旨在测评杉木[Cunninghamia lanceolata(Lamb.)Hook]优良无性系耐旱性,并建立精准DNA数字指纹图谱,为无性系推广应用与品种保护提供依据。测定无性系在PEG-6000模拟干旱下的生理生化指标,运用隶属函数法综合评价耐旱性;利用SRAP技术进行无性系种质鉴别。结果显示,参试杉木无性系在干旱胁迫条件下叶片相对含水量、丙二醛和脯氨酸含量、超氧化物歧化酶和过氧化物酶及过氧化氢酶活性均发生不同程度变化,综合调控模式也存在一定程度差异,无性系耐旱性综合排序为:T-c01 > T-c22 > T-cF1 > T-c07 > T-c04 > T-c08。16对SRAP引物组合共扩增到131个清晰、稳定谱带,多态性比例66.8%,基于此构建了无性系DNA-SRAP 数字指纹图谱。杉木无性系耐旱性存在差异,T-c01 耐旱性较强,T-c08耐旱性较弱;利用SRAP引物组合Me1/Em1+Me4/Em21+Me11/Em5可快速鉴别各无性系,置信概率99.99998%。

关键词: 杉木, 耐旱性, 分子多态性, 指纹图谱

Abstract: It was to evaluate the drought-tolerance of the elite clones(T-c01,T-c04,T-c07,T-c08,T-c22,T-cF1)of Chinese fir(Cunninghamia lanceolata(Lamb.)Hook),and to generate clone-specific digital DNA fingerprinting ID,aiming to provide basis for the application and protection of these clones. Different plant physiological and biochemistry indexes including relative water content,malondialdehyde and proline content,and activity of superoxide dismutase,peroxidase and catalase,were measured for the present clones under PEG-6000 simulated drought condition. The results indicated that there had comprehensive change in physiological and biochemistry indexes among clones,while different clone seemed to have rather different systematic drought-response manner. According to the subordinate function values,a sequenced drought-tolerant order was identified,showing as T-c01 > T-c22 > T-cF1 > T-c07 > T-c04 > T-c08. For sequence-related amplified polymorphism(SRAP)based-germplasm discrimination assay,16 SRAP primer combinations produced 131 clear and stable bands with a percentage of polymorphic bands of 66.8%,allowing a generation of clone-specific digital DNA fingerprinting ID by primer set of Me1/Em1+Me4/Em21+Me11/Em5 with confidence probability of 99.99998%.

Key words: Chinese fir, drought-tolerance, molecular polymorphism, fingerprinting