globalchange  > 影响、适应和脆弱性
项目编号: 1501764
项目名称:
DISSERTATION RESEARCH: Shedding Light on the Complex Relationship Between Circadian Clock Variation and the Trade-off Between Flowering Time and Flower Size
作者: John Willis
承担单位: Duke University
批准年: 2014
开始日期: 2015-09-01
结束日期: 2017-11-30
资助金额: USD20634
资助来源: US-NSF
项目类别: Standard Grant
国家: US
语种: 英语
特色学科分类: Biological Sciences - Environmental Biology
英文关键词: trade-off ; flowering time ; period length ; variation ; flower size ; such trade-off ; circadian clock gene network ; large flower ; genetic variation ; different flowering parameter ; important trade-off ; locus ; early flowering
英文摘要: A key question in evolutionary biology is how variation is maintained within populations. One possible mechanism is trade-offs between traits. This research will demonstrate whether such trade-offs occur in natural populations of the monkeyflower, Mimulus guttatus, and if developmental patterns influence such trade-offs. For many plants there is a trade-off between flowering time and number or quality of seeds. For example, plants that flower early typically have smaller flowers that are less attractive to pollinators and produce smaller seeds. However, a single population could maintain genetic variation for both early flowering and large flowers because either strategy might be successful. The project also will provide hands-on experience to undergraduates and outreach to middle and high school students.

Mimulus guttatus is a short-lived annual. In both the greenhouse and field there exists a centrally important trade-off between flowering time and flower size. Circadian period length can serve as a highly informative intermediate trait for identifying the genetic underpinnings of flowering time variation. The circadian clock gene network is well characterized, is known to affect flowering time, and varies among populations. The project will identify and characterize loci associated with changes in period length, and determine relationships between period length, differential gene expression, and different flowering parameters. The first aim will be accomplished by determining period length of all members of a pre-existing set of 200 fully sequenced inbred lines generated from a single population. By conducting genome-wide association mapping the researchers will identify loci associated with variation in period length, flowering time, and flower size. The second aim will be accomplished using an RNA sequencing based approach to characterize the contribution of alternate alleles at previously identified loci to differential gene expression.
资源类型: 项目
标识符: http://119.78.100.158/handle/2HF3EXSE/93419
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


Recommended Citation:
John Willis. DISSERTATION RESEARCH: Shedding Light on the Complex Relationship Between Circadian Clock Variation and the Trade-off Between Flowering Time and Flower Size. 2014-01-01.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[John Willis]'s Articles
百度学术
Similar articles in Baidu Scholar
[John Willis]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[John Willis]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.