园艺学报 ›› 2019, Vol. 46 ›› Issue (11): 2176-2187.doi: 10.16420/j.issn.0513-353x.2019-0115

• 研究论文 • 上一篇    下一篇


张焕欣,李国权,杨惠栋,曹 娜,朱方红*   

  1. 江西省农业科学院园艺研究所,南昌 330200
  • 出版日期:2019-11-25 发布日期:2019-11-25
  • 基金资助:

Genome-wide Identification and Expression of Dof Family in Melon(Cucumis melo)

ZHANG Huanxin,LI Guoquan,YANG Huidong,CAO Na,and ZHU Fanghong*   

  1. Institute of Horticulture,Jiangxi Academy of Agricultural Sciences,Nanchang 330200,China
  • Online:2019-11-25 Published:2019-11-25

摘要: 基于甜瓜全基因组数据信息,利用生物信息学方法对甜瓜Dof家族基因进行了全面鉴定和系统发育分析,并通过Real-time PCR方法检测了CmDof家族成员对模拟干旱(PEG6000)、盐和低温胁迫的应答。结果表明:在甜瓜中存在34个Dof基因,除1、5和7号染色体外其余染色体均有分布,发生11次染色体片段重复事件和2次串联重复事件,外显子数在1 ~ 3之间,其蛋白质等电点在4.95 ~ 9.59之间;蛋白序列系统发育分析显示CmDof蛋白可分为9个进化亚群;组织表达模式分析发现该家族基因具有一定的时空表达特异性;多数CmDof基因对PEG6000、盐和低温胁迫有响应,其中CmDof3/CmDof5/CmDof10/ CmDof17、CmDof3/CmDof5/CmDof10和CmDof3/CmDof5/CmDof32分别响应PEG6000、盐和低温胁迫。

关键词: 甜瓜, Dof, 基因家族, 进化分析, 表达特性

Abstract: In this study,we systematically investigated the members of Dof family in melon(Cucumis melo L.)based on the whole-genome sequences and elucidated their phylogenetic relationships. Responses to PEG6000,salt and chilling stresses were detected by real-time PCR method. The results showed that a total of 34 CmDof genes were identified in melon. These CmDof genes were distributed on all chromosomes except the 1st,5th and 7th. Two pairs of tandem duplicated genes were identified,and 11 pairs of segmental duplication genes were observed. The number of exons ranged from 1 to 3,and isoelectric points ranged from 4.95 to 9.59. Phylogenetic analysis showed that CmDof proteins were divided into nine phylogenetic subgroups. The expression patterns of CmDof genes in different tissues showed spatiotemporal expression specificity. Additionally,most CmDof genes could respond to PEG6000,salt and chilling stresses. CmDof3/CmDof5/CmDof10/CmDof17,CmDof3/CmDof5/CmDof10 and CmDof3/CmDof5/CmDof32 were responsive to PEG6000,salt and chilling stresses,respectively.

Key words: melon, Dof, gene family, phylogeny analysis, expression characteristic