华北农学报 ›› 2023, Vol. 38 ›› Issue (1): 46-52. doi: 10.7668/hbnxb.20193440

所属专题: 甜椒辣椒 生物技术 蔬菜专题

• 作物遗传育种·种质资源·生物技术 • 上一篇    下一篇

辣椒雄性不育系和保持系CaMADS6基因克隆及表达分析

廖铭宇1,2, 肖佳林1,2, 李丽缘1,2, 宋钰1,2, 黄湖荣1,2, 杨博智1,2,   

  1. 1 湖南农业大学 园艺学院,湖南 长沙 410128
    2 园艺作物种质创新与新品种选育教育部工程研究中心,湖南 长沙 410128
  • 收稿日期:2022-08-09 出版日期:2023-02-28
  • 通讯作者:
    杨博智(1983—),女,湖南益阳人,副研究员,博士,主要从事辣椒生物技术研究。
  • 作者简介:

    廖铭宇(1999—),女,重庆人,在读硕士,主要从事辣椒分子生物学研究。

  • 基金资助:
    国家自然科学基金项目(U19A2028)

Cloning and Expression Analysis of CaMADS6 in Cytoplasmic Male Sterile Line and Maintainer Line of Pepper

LIAO Mingyu1,2, XIAO Jialin1,2, LI Liyuan1,2, SONG Yu1,2, HUANG Hurong1,2, YANG Bozhi1,2,   

  1. 1 College of Horticulture,Hunan Agricultural University,Changsha 410128,China
    2 Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding,Ministry of Education,Changsha 410128,China
  • Received:2022-08-09 Published:2023-02-28

摘要:

为探究CaMADS6表达量与辣椒花器官发育之间的关系,以辣椒不育系9704A和保持系9704B为试验材料,克隆CaMADS6进行生物信息学预测,并分析该基因在两系中的时空表达特性。结果表明,从9704A和9704B中克隆得到的CaMADS6编码区序列一致,序列长744 bp,编码247个氨基酸残基。CaMADS6蛋白相对分子量为28.67 ku,理论等电点为8.98,为亲水性蛋白,无跨膜结构,二级结构中α螺旋占57.49%、延伸链占8.91%、无规则卷曲占28.74%。CaMADS6与辣椒CaFUL2同源性100%,蛋白结构域具有典型的MADS-box特征;CaMADS6在两系各发育时期不同器官中均有表达,表达量大小均为花蕾中最高、其次为叶和茎,根中几乎不表达。9704A茎中CaMADS6表达量在苗期、花蕾期和成株期3个发育时期中均显著低于9704B茎中的表达量,叶中CaMADS6表达量在成株期极显著低于9704B叶中表达量。花蕾中CaMADS6表达量在花蕾期和成株期均极显著高于9704B花蕾中表达量,分别为9704B的2.2,3.5倍;CaMADS6在两系植株花器官不同部位均能表达,表达量由大到小依次为花萼、花冠、子房、花药,其中9704A花萼和花冠中CaMADS6表达量极显著或显著低于9704B,分别为9704B花萼、花冠中CaMADS6表达量的66%,83%,花药中CaMADS6表达量为9704B表达量的34倍,两者差异极显著,推测CaMADS6基因在花药中的异常表达与辣椒雄性不育密切相关。

关键词: 辣椒, 雄性不育, CaMADS6, 基因克隆, 表达分析

Abstract:

To explore the relationship level between CaMADS6 expression and floral organ development of pepper,CaMADS6 was cloned for bioinformatics prediction from the sterile line 9704A and the maintainer line 9704B,and the spatiotemporal expression characteristics of this gene were analyzed.The results showed that the CaMADS6 cloned from 9704A and 9704B had the same coding sequence,with a full length of 744 bp and encoding 247 amino acid residues.CaMADS6 protein had the relative molecular weight of 28.67 ku and theoretical isoelectric point of 8.98.It was a hydrophilic protein with no transmembrane structure.The secondary structure of CaMADS6 consisted of 57.49% α-helices,8.91% extended chains and 28.74% irregular coils.The CaMADS6 protein shared 100% homology with CaFUL2,which possessed a typical MADS-box characteristics.CaMADS6 was expressed in different organs of 9704A and 9704B at different developmental stages and the expression was the highest in flower buds,followed by leaves and stems,and almost no expression in roots.The expression of CaMADS6 in stems of 9704A was significantly lower than that of 9704B at seedling,flower bud and adult stages,and the expression of CaMADS6 in leaves was significantly lower than that of 9704B at the adult stage.The expression level of CaMADS6 in flower buds of 9704A was extremely significantly higher than that of 9704B at flower bud and adult stage,and its expression level was 2.2 and 3.5 times higher than in 9704B,respectively;CaMADS6 gene was expressed in different parts of flower organs of 9704A and 9704B,and the expression of CaMADS6 gene from high to low was calyx,corolla,ovary and anther.The expression level of CaMADS6 in the calyx and corolla of 9704A was extremely significantly or significantly lower than that of 9704B,the expression level of CaMADS6 were 66%,83% of 9704B,respectively.The expression level of CaMADS6 in 9704A anther was 34 times higher than in 9704B,and the difference between the two groups was extremely significant,predicting the abnormal expression of CaMADS6 in anthers was closely related to pepper male sterility.

Key words: Pepper, Male sterility, CaMADS6, Gene cloning, Expression analysis

引用本文

廖铭宇, 肖佳林, 李丽缘, 宋钰, 黄湖荣, 杨博智. 辣椒雄性不育系和保持系CaMADS6基因克隆及表达分析[J]. 华北农学报, 2023, 38(1): 46-52. doi: 10.7668/hbnxb.20193440.

LIAO Mingyu, XIAO Jialin, LI Liyuan, SONG Yu, HUANG Hurong, YANG Bozhi. Cloning and Expression Analysis of CaMADS6 in Cytoplasmic Male Sterile Line and Maintainer Line of Pepper[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(1): 46-52. doi: 10.7668/hbnxb.20193440.

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