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Evolutionary adaptation on floral longevity and reproductive traits in Camissonia refracta and Hemerocallis vespertina

Camisonia refracta 和 Hemerocallis vespertina 花寿命和繁殖性状的进化适应

基本信息

批准号：
17570080
负责人：
NOGUCHI Junko
金额：
$ 2.3万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

The purpose of this project is to clarify about the evolutionary adaptation on the floral longevity traits of Camissonia refracta (Onagraceae) occurring in the Mojave Desert, California and Hemerocallis vespertina occurring in Japan, and aboutthe relation between the floral longevity and reproductive traits.The following has been conducted or conducting :(1)The selection gradients of the floral longevity traits, floral characters, growth forms, and floral seasons have been calculated by the quantitative genetics procedures of the Lande and Arnold (1983) and Arnold and Wade (1984) in the two populations of Camissonia refracta, based on the data collected in 2005 and 2004. The selection gradients of the characters of the degree of petal opening during the day, floral size, and plant size have been statistically significant, indicating that natural selection is acting on the characters.(2)The heritability of the characters is investigating based on half-sib methods, carrying over several difficulty in the process of the cultivation. At present, the Fl capsules are collecting.(3)The respective relationships of the characters detected the significant selection gradients have been clarified by path analysis.(4)The Camissonia refracta species is self-incompatible. The self-compatible individuals were found, having late flowering season and very short floral longevity. At first, the type of the self-incompatible is decided based on the results of cross-examination and the position of the pollen tubes breaking down.(5)On Hemerocallis vespertina the relation between nectar volume in a flower and fitness was investigated.The papers based on these results have been submitted or preparing at present.

本研究旨在阐明茶荠花寿命性状的进化适应性（Onagraceae）和日本的黄花菜（Hemerocallis vespertina）的花寿命和生殖性状之间的关系。（1）花寿命性状、花部性状、生长型、用Lande和Arnold（1983）和Arnold和Wade（1984）的数量遗传学方法计算了两个居群的花季，根据2005年和2004年收集的数据。白天花瓣开放程度、花大小和植株大小等性状的选择梯度在统计学上均达到显著水平，表明自然选择作用于这些性状。（2）采用半同胞法对各性状的遗传力进行了研究，克服了栽培过程中的一些困难。目前，F1胶囊正在收集中。（3）通过通径分析，明确了显著选择梯度检测性状间的相互关系。（4）Camissonia refracta种是自交不亲和的。发现自交亲和个体花期晚，花期短。首先根据交叉鉴定结果和花粉管断裂的部位来确定自交不亲和的类型。(5)On摘要对黄花菜花蜜量与适合度的关系进行了研究，目前已有相关论文提交或准备发表。