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通过基因内起源和合成生物学方法加速草莓遗传增益:开发改善果实品质和抗病性的新工具。

The Intragenesis and Synthetic Biology Approach towards Accelerating Genetic Gains on Strawberry: Development of New Tools to Improve Fruit Quality and Resistance to Pathogens.

作者信息

Súnico Victoria, Higuera José Javier, Molina-Hidalgo Francisco J, Blanco-Portales Rosario, Moyano Enriqueta, Rodríguez-Franco Antonio, Muñoz-Blanco Juan, Caballero José L

机构信息

Departamento Bioquímica y Biología Molecular, Campus de Rabanales, Edif. Severo Ochoa C6, Universidad de Córdoba, 14071 Cordoba, Spain.

出版信息

Plants (Basel). 2021 Dec 25;11(1):57. doi: 10.3390/plants11010057.

Abstract

Under climate change, the spread of pests and pathogens into new environments has a dramatic effect on crop protection control. Strawberry ( spp.) is one the most profitable crops of the Rosaceae family worldwide, but more than 50 different genera of pathogens affect this species. Therefore, accelerating the improvement of fruit quality and pathogen resistance in strawberry represents an important objective for breeding and reducing the usage of pesticides. New genome sequencing data and bioinformatics tools has provided important resources to expand the use of synthetic biology-assisted intragenesis strategies as a powerful tool to accelerate genetic gains in strawberry. In this paper, we took advantage of these innovative approaches to create four RNAi intragenic silencing cassettes by combining specific strawberry new promoters and pathogen defense-related candidate DNA sequences to increase strawberry fruit quality and resistance by silencing their corresponding endogenous genes, mainly during fruit ripening stages, thus avoiding any unwanted effect on plant growth and development. Using a fruit transient assay, expression was detected by the two synthetic and promoters, both by histochemical assay and qPCR analysis of GUS transcript levels, thus ensuring the ability of the same to drive the expression of the silencing cassettes in this strawberry tissue. The approaches described here represent valuable new tools for the rapid development of improved strawberry lines.

摘要

在气候变化的背景下,害虫和病原体向新环境的扩散对作物保护控制产生了巨大影响。草莓( spp.)是全球蔷薇科中最具经济效益的作物之一,但有50多个不同属的病原体影响该物种。因此,加快提高草莓果实品质和抗病性是育种的重要目标,也是减少农药使用的关键。新的基因组测序数据和生物信息学工具为扩大合成生物学辅助基因内起源策略的应用提供了重要资源,该策略是加速草莓遗传增益的有力工具。在本文中,我们利用这些创新方法,通过结合特定的草莓新启动子和与病原体防御相关的候选DNA序列,创建了四个RNAi基因内沉默盒,主要在果实成熟阶段通过沉默其相应的内源基因来提高草莓果实品质和抗性,从而避免对植物生长发育产生任何不良影响。通过果实瞬时试验,利用组织化学分析和GUS转录水平的qPCR分析,检测了由两个合成启动子驱动的表达,从而确保了它们在草莓组织中驱动沉默盒表达的能力。本文所述方法为快速培育改良草莓品种提供了有价值的新工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d5e/8747664/31ee2e643588/plants-11-00057-g001.jpg

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