全基因组鉴定普通菜豆WOX基因及出愈率相关分析
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1.山西农业大学农学院;2.中国农业科学院作物科学研究所

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国家食用豆产业技术体系


Whole Genome Identification of WOX Gene Family and Related to Callus Induction in Commom Bean(Phaseolus vulgaris L.)
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China Agriculture Research System -Food Legumes

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    摘要:

    出愈率是影响遗传转化的重要因素,而WOX基因可促进细胞增值和芽分化,进而提升遗传转化效率。本研究拟全基因组鉴定普通菜豆WOX基因家族成员,分析其核酸和蛋白序列特征、保守结构域、染色体位置及顺式作用元件。对普通菜豆、绿豆、大豆和拟南芥WOX基因家族成员进行基因组共线性和系统进化树分析。建立普通菜豆品种的愈伤组织诱导体系,比较转录组结合qRT-PCR分析,鉴定与愈伤组织诱导率相关的WOX差异表达基因。结果表明,全基因组鉴定出18个WOX基因家族成员,编码氨基酸范围为177?847aa,亚细胞定位于细胞核。根据亲缘关系可将18个普通菜豆、15个拟南芥、58个绿豆和33个大豆WOX基因可划分为三大类群。所鉴定的WOX基因成员的蛋白序列均包含HD(homeodomain)保守结构域。其启动子序列主要包含“分生组织形成相关”及“生长素反应相关”等顺式作用元件。共线性分析表明,4个物种间WOX同源基因核酸序列所包含的同义突变大于非同义突变,受纯化选择作用。采用MS+0.4 mg/L 6-BA+1 mg/L 2, 4-D和MS+0.6 mg/L 6-BA+1 mg/L 2, 4-D培养基,成功建立了龙17-3965和龙10下胚轴愈伤组织诱导体系。比较转录组分析,鉴定出8个WOX差异表达基因;相关性分析表明PvWOX1/15/16基因与出愈率相关,且PvWOX1/15在愈伤组织形成时表达下调,PvWOX16基因表达上调。qRT-PCR分析表明3个WOX差异表达基因与转录组结果一致。结果暗示PvWOX1/15/16基因表达与普通菜豆出愈率相关,可以作为潜在的靶基因用于遗传转化的研究。本研究为进一步利用WOX基因建立普通菜豆高效再生体系及遗传转化提供基因资源。

    Abstract:

    The genome sequencing of Common bean has been completed, but the research on its important genetic traits and genetic transformation is being carried out gradually. In this study, the WOX gene nucleotide sequence, gene structure, conserved domain, chromosome location and cis-acting elements of common bean. were identified in the whole genome. Genomic collinearity and phylogenetic tree analysis of WOX gene family members in Common bean, Mung bean, Soybean and Arabidopsis were performed. The callus induction system of two common bean. varieties was successfully established. Differentially expressed WOX genes related to callus induction rate were identified by comparison of transcriptome and qRT-PCR analysis. The results showed that the stem callus of two Common bean varieties Long17-3965 and Long10 were successfully induced by MS+0.4mg/L 6-BA+1mg/L 2,4-D and MS+0.6mg/L 6-BA+1mg/L 2,4-D, and the highest healing rate was obtained. The whole genome identified 18 WOX gene family members in common bean, distributed on 10 chromosomes. Phylogenetic tree analysis showed that 18 Common bean, 15 Arabidopsis, 58 Mung bean and 33 Soybean WOX gene family members could be divided into three major groups. The conserved domains of WOX genes in three major groups mainly include HD (homeodomain) domains. PvWOXs gene promoters mainly contained 28 different types of cis-acting elements such as "meristem formation correlation" and"auxin response correlation". Genomic collinearity analysis among 4 species was found that most of gene containing the number of synonymous mutation greater than nonsynonymous mutaion in nucleotide sequence. Using MS + 0.4 mg/L 6-BA + 1 mg/L 2,4-D and MS + 0.6 mg/L 6-BA + 1 mg/L 2,4-D medium, a successful system for inducing callus tissue from the hypocotyls of Long 17-3965 and Long 10 was established. Transcriptome analysis revealed 8 differentially expressed WOX genes; correlation analysis showed that PvWOX1/15/16 was related to callus induction rate, with PvWOX1/15 downregulated during callus formation and PvWOX16 upregulated. The 3 WOX differentially expressed gene were identified by comparative transcriptome analysis. qRT-PCR identification results consistented with PvWOX1/15/16 gene expression value FPKM in transcriptomic data.Meantime, PvWOX1/15/16 gene expression level were signifcantly correlated with the rate of callus induction. According to the bove results, it suggested that PvWOX1/15/16 gene can be the potential target genes for the research on genetic transformation in Common bean. Further, this study provides key gene resources for establishing efficient regeneration system and genetic transformation of Common bean in the future.

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  • 收稿日期:2024-11-04
  • 最后修改日期:2024-12-23
  • 录用日期:2024-12-27
  • 在线发布日期: 2025-01-13
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