1.重庆市农业科学院玉米研究所,重庆 401329;2.长江师范学院现代农业与生物工程学院,重庆 401329
研究方向为玉米遗传育种,E-mail :272245217@qq.com
付忠军,研究方向为玉米遗传育种,E-mail : world.12345@163.com
重庆市技术创新与应用发展专项(CSTB2022TIAD-KPX0008);重庆市科研机构绩效激励引导专项(cstc2022jxjl80028)
1.Maize Research Institute, Chongqing Academy of Agricultural Sciences, Chongqing 401329;2.School of Advanced Agriculture and Bioengineering, Yangtze Normal University, Chongqing 401329
Foundation projects: The Chongqing Technical Innovation and Application Development Special Project (CSTB2022TIAD-KPX0008);Performance Incentive and Guidance Project for Chongqing Scientific Research Institutions (cstc2022jxjl80028)
紫玉米(Zea mays L.)含有较高的花青素和其他功能性植物化学物质,广泛应用于功能食品和医药等行业,为玉米产业带来了较大的经济效益。为探究紫玉米中花青素生物合成的调控机制,利用生物信息学法,从玉米全基因组数据库中鉴定出分布于10条染色体上的83个花青素生物合成相关基因(ZmABGs);系统发育树将这些基因分为五组。ZmABGs启动子区的顺式作用元件分析表明,ZmABGs基因在参与激素信号通路和胁迫响应中起重要作用。通过对ZmABGs在玉米不同组织的表达分析发现,与非授粉组织相比,多个ZmABGs基因在授粉组织中表达,尤其是在玉米种皮中。利用qRT-PCR技术对与粒色相关的15个关键ZmABGs基因在籽粒发育不同时期的表达分析表明,调控基因(ZmPAP1-b和ZmLBD38-a)及其靶结构基因(ZmF3H-b、ZmDFR-b、ZmCHS-b、ZmF3′H-b、ZmPAL1-b、ZmPAL1-i和ZmC4H-c)的共同上调可能促进了Zi 2-1在籽粒发育早期阶段(授粉后10~34 d)的花青素积累,而在后期发育阶段(授粉后34~46 d)这些 ZmABGs 则表现出下调。本研究结果有助于更好地了解玉米中花青素积累的遗传机制和调控网络,同时为促进高花青素玉米品种的选育提供一定的理论基础。
Purple corn (Zea mays L.) is rich in anthocyanins and other functional phytochemicals, making it highly valued in the function food and pharmaceutical industries and contributing significantly to the economic benefits of the corn industry. To explore the regulatory mechanisms underlying anthocyanin biosynthesis in purple corn, we identified 83 anthocyanin biosynthetic genes (ZmABGs) using a bioinformatic approach. These genes were classified into five groups using phylogenetic tree and were widely and randomly distributed on 10 chromosomes. Analysis of cis-acting elements in the promoters of ZmABGs indicated that these genes may be involved in hormone signaling pathways and responsive to various stresses. Additionally, transcriptional analysis across different tissues revealed that more ZmABGs genes were expressed in pollinated organ samples than in un-pollinated ones, especially in the corn pericarp. qRT-PCR showed that the upregulation of regulatory genes (ZmPAP1-b and ZmLBD38-a) together with their target structural genes (such as ZmF3H-b, ZmDFR-b, ZmCHS-b, ZmF3′H-b, ZmPAL1-b, ZmPAL1-i and ZmC4H-c) might promote anthocyanin accumulation in the early developmental stages (10-34 days) of Zi 2-1. In contrast, the downregulation of these ZmABGs occurs at late developmental stages (34-46 days). Collectively, our results provide insight into the genetic mechanisms and regulatory networks governing anthocyanin accumulation in maize, offering a theoretical basis for promoting the breeding of high anthocyanin maize varieties.
李淑君,付忠军,郝芸茜,等.玉米花青素合成相关基因的鉴定及表达分析[J].植物遗传资源学报,2025,26(5):974-988.
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