Improving wheat photosynthesis through wide crossing with wild relatives and selection using novel environments

通过与野生近缘种广泛杂交和利用新环境进行选择来改善小麦光合作用

• 批准号: 2169085
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2169085
• 关键词: Improving; wheat; photosynthesis; through; wide

Wheat yield gains are currently insufficient to meet the demands of the future thus posing a risk to global food security. In order to increase yields it is necessary to improve photosynthesis, as this is the primary determinant of biomass. The ability to select for improved photosynthesis within modern bread wheat cultivars is constrained by genetic 'bottlenecks' which occurred following domestication. To increase genetic diversity it may be possible to exploit wild relative germplasm, of particular interest are the genus' Aegilops and Triticum, which exhibit variable photosynthetic traits. In this work, double haploid lines of bread wheat containing introgressions from Aegilops mutica and Triticum urartu are to be screened using a variety of novel environmental conditions including sub-ambient CO2 . The photosynthetic , photoprotective and photorespiratory properties will be evaluated using a variety of techniques including chlorophyll fluorescence, gas exchanging and leaf biochemistry.

目前小麦产量的增加不足以满足未来的需求，从而对全球粮食安全构成威胁。为了提高产量，有必要改善光合作用，因为这是生物量的主要决定因素。在现代面包小麦品种中选择改善光合作用的能力受到驯化后发生的遗传“瓶颈”的限制。为了增加遗传多样性，有可能利用野生近缘种质，特别感兴趣的是山羊草属和小麦属，它们表现出可变的光合特性。在这项工作中，双单倍体面包小麦含有渐渗从山羊草和乌拉尔小麦进行筛选，使用各种新的环境条件，包括亚环境CO2。利用叶绿素荧光、气体交换和叶片生物化学等多种技术，评价其光合、光保护和光呼吸特性。