ROA: Collaborative Research: Genetic/Environmental Effects on Plant Gametophytic/Sporophytic Dynamics

ROA：合作研究：遗传/环境对植物配子体/孢子体动力学的影响

• 批准号: 8906667
• 负责人: Allison Snow
• 金额: --
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-10-15 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8906667&HistoricalAwards=false
• 关键词: ROA; Collaborative; Research; Genetic; Environmental

Research will focus on the causes of variation in the number of seeds that a plant produces by donating pollen to other individuals. Preliminary studies of rose mallow (Hibiscus moscheutos) showed that 1) pollen tubes, which carry paternal genes to the ovary, often compete for ovules within a flower, and 2) some individuals have faster growing pollen tubes than others. These differences among individuals are probably important in determining which plants sire the most seeds in natural populations. The investigators will examine the relative importance of genetic vs. environmental effects on pollen performance. They will also test the hypothesis that pollen tube growth rates are positively correlated with seedling growth rates. Results can be directly applied to agricultural problems by determining whether genetically superior seedlings can be artificially selected by hand-pollinating flowers with large amounts of pollen from a large group of donor plants. Fundamental questions will also be addressed about the reproductive ecology of wild plants, which should be conserved for their potential role as genetic "libraries". Useful genetic variation in this wild hibiscus could eventually be introduced into related species, such as cultivated hibiscus, cotton, okra, and kenaf, to improve their vigor and yield.

研究将集中在植物通过向其他个体提供花粉而产生的种子数量变化的原因上。对玫瑰锦葵（Hibiscus moscheutos）的初步研究表明：1)携带父系基因到子房的花粉管经常在一朵花内争夺胚珠；2)一些个体的花粉管比其他个体生长得快。这些个体间的差异很可能是决定自然种群中哪种植物产生最多种子的重要因素。研究人员将研究遗传和环境对花粉表现的影响的相对重要性。他们还将验证花粉管生长速率与幼苗生长速率正相关的假设。研究结果可以直接应用于农业问题，确定是否可以通过从大量供体植物中提取大量花粉，人工授粉来选择遗传优良的幼苗。关于野生植物的生殖生态的基本问题也将得到解决，它们作为遗传“文库”的潜在作用应该得到保护。这种野生木槿的有用遗传变异最终可以引入相关物种，如栽培木槿、棉花、秋葵和红麻，以提高其活力和产量。