What factors control variation in floral initiation in strawberry?

哪些因素控制草莓开花起始的变化？

• 批准号: 2618604
• 金额: --
• 依托单位: University of Reading
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2618604
• 关键词: What; factors; control; variation; floral

The research on the control of meristem fates lacked sufficient attention at the molecular level, despite its large importance in the horticultural industry. As with all rosaceous perennials (apart from everbearing strawberries and primocane raspberries), floral initiation happens in short days at the end of summer, followed by an obligatory dormancy/chilling period, after which flowers emerge. It is well known that there is large, genetically determined variation in yield in strawberry that is largely determined by the production of flowering shoots from axillary meristems during the floral initiation process. While we have identified major players controlling floral initiation and the production of flowering shoots in the model strawberry, Fragaria vesca, comparative molecular studies should be done between lines of the octoploid strawberry to improve yield. Based on the current knowledge in the model strawberry, this student will carry out detailed physiological studies combined with molecular analyses of candidate genes in the octoploid strawberry lines with contrasting number of flowering shoots. To test the gene functions in octoploid strawberry, two candidate genes will be manipulated using gene editing technology, and the edited lines will be tested in a controlled climate. Understanding the key molecular processes that underpin floral initiation will facilitate the selection of high yielding lines and optimisation of the propagation processes which in turn will deliver plant material to growers that has higher yield potential. This is necessary, since yield is still a primary limiting factor to enhanced profitability for growers especially in programmed cropping systems.

尽管分生组织命运的控制在园艺产业中非常重要，但在分子水平上的研究缺乏足够的关注。与所有的蔷薇科多年生植物（除了多年生草莓和樱草树莓）一样，花的开始发生在夏末的短时间内，然后是一个强制性的休眠/冷却期，之后花朵出现。众所周知，草莓产量存在很大的遗传决定的变异，这在很大程度上取决于花起始过程中从腋生分生组织产生的开花枝条。虽然我们已经确定了主要的球员控制花的启动和生产的模式草莓，草莓开花的枝条，比较分子研究应该做的四倍体草莓线之间，以提高产量。根据目前对模型草莓的了解，该学生将进行详细的生理研究，结合对四倍体草莓品系中候选基因的分子分析，并与开花枝条的数量进行对比。为了测试四倍体草莓中的基因功能，将使用基因编辑技术操作两个候选基因，并在受控气候下测试编辑的品系。了解支撑成花起始的关键分子过程将有助于选择高产品系和优化繁殖过程，这反过来将向具有更高产量潜力的种植者提供植物材料。这是必要的，因为产量仍然是提高种植者盈利能力的主要限制因素，特别是在计划种植制度中。