Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 8919674 |
| RUI: Collaborative Research: Evolutionary Dynamics of a Color Polymorphism in the Desert Annual Linanthus parryae | |
| Paulette Bierzychudek | |
| 主持机构 | Pomona College |
| 开始日期 | 1990-02-01 |
| 结束日期 | 1994-01-31 |
| 资助经费 | 45962(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | CROSS-DIRECTORATE PROGRAMS, SPECIAL PROGRAMS-RESERVE |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | One of the goals of modern evolutionary biology is to understand the forces that determine the distribution and maintenance of genetic variation in natural populations. Two of the primary evolutionary forces are 1) genetic drift, the change in gene frequency due to random processes associated with small population size, and 2) natural selection, the differential survival and reproduction of individuals. The purpose of the proposed research is to quantify the relative importance of these forces in populations of the desert plant, Linanthus parryae. This species flowers after winter rains, and individuals produce either white or blue flowers. Previous research by Dr. Sewall Wright, one of the founders of the field of population genetics, suggested that the population size of this species was quite small, and that the two flower colors were maintained in natural populations by random genetic drift. The alternative hypothesis is that different colored plants are adapted to different local conditions, perhaps due to contrasting abilities to attract pollinators and produce seed. Because flower color is an inherited trait, this selective process will cause a change in the genetic make-up of the population. The proposed research will identify how random events and selective differences between individuals can contribute to evolutionary changes in plant populations. Such information is vital to our understanding of biological diversity. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=8919674 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/340979 |
| 推荐引用方式 GB/T 7714 | Paulette Bierzychudek.RUI: Collaborative Research: Evolutionary Dynamics of a Color Polymorphism in the Desert Annual Linanthus parryae.1990. |
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