"Deviating from the beaten path: barley microspores as a system to study embryogenesis, DNA damage and recombination"

“偏离常规：大麦小孢子作为研究胚胎发生、DNA 损伤和重组的系统”

• 批准号: 138324-2012
• 负责人: Belzile, François
• 金额: $ 2.91万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=545519
• 关键词: Deviating; beaten; path; barley; microspores

In some plants, it is possible to alter the fate of an immature microspore, a cell normally destined to become a pollen grain, such that it starts to divide and develops into an embryo and, eventually, a normal plant. Initially, such plants are haploid, i.e. they have only half the normal number of chromosomes and are sterile at flowering. In barley, however, more than 2/3 of such haploid plants undergo a spontaneous chromosome doubling that restores their ability to produce seed. Such doubled haploid (DH) lines are used in breeding programs to accelerate the speed with which new varieties can be developed.

在某些植物中，有可能改变未成熟小孢子的命运，这种细胞通常注定要成为花粉粒，这样它就开始分裂并发育成胚胎，最终发育成正常的植物。最初，这样的植物是单倍体，即它们只有正常染色体数目的一半，并且在开花时不育。然而，在大麦中，超过2/3的此类单倍体植物经历自发染色体加倍，恢复其产生种子的能力。这样的双单倍体（DH）系用于育种计划中以加快新品种的开发速度。