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Evolution of mating systems in Angiosperms

被子植物交配系统的进化

基本信息

批准号：
02304008
负责人：
KAWANO Shoichi
金额：
$ 1.54万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

Three different types of mating systems are known in angiosperms, i. e., (1) obligate xenogamy (or outbreeding), (2) facultative xenogamy (or autogamy), and (3) obligate autogamy. In the present research project, the roles of different breeding systems for the production of offsprings and their evolutionary significance for population differentiations were investigated from theoretical as well as empirical standpoints. New evidences obtained from experimental studies and also field observations were also examined in the light of new models and theories presented in the present studies.1. Previous population genetical models. and Lande-Schemske's model predicted the evolutionary advantages of a mating strategy, i. e., facultative autogamy, but its evolutionary implications were re-examined based on the results obtained by examining the roles of abortion, inbreeding depression, cost of outbreeding, differentiation patterns of autogamy at the population level.2. Examples were presented based upon the studies on Campanula punctata, C. microdonta, Trillium differentiations in mating systems, outcrossing rates, and sex allocation patterns.3. The roles of offspring recruitment by cleistogamous and chasmogamous flowers in such plant species with dimorphic reproductive systems as Ainsliaea fauriana, A. abiculata, and Leibnitzia anandria were examined in field and experimental popualtions. Controlling mechanisms of CH and Cl seed production under various environmental regimes were also anlyzed.4. Autogamous system of Sceptridum (Ophioglossaceas) was examined and compared with that of anagiosperms.5. Based upon all these new evidence and theoretical frameworks, the roles of autogamous mating systems in plants for population differentiations were examined discussed.

被子植物有三种不同的交配系统，即：例如，(1)专性异配（或远系繁殖），（2）兼性异配（或自配），（3）专性自配。在本研究项目中，从理论和经验的角度研究了不同的繁殖系统对后代生产的作用及其对种群分化的进化意义。根据本研究中提出的新模型和理论，还对实验研究和现场观察中获得的新证据进行了检验。以前的人口遗传模型。Lande-Schemske的模型预测了交配策略的进化优势，即：例如，在此基础上，通过研究流产、近交衰退、远交代价、群体水平上的自婚分化模式等因素的作用，重新探讨了其进化意义.本文以点铃风铃草（Campanula punctata）、圆铃风铃草（C.小齿类、延龄草交配系统的分化、异交率和性别分配模式.本文探讨了闭花受精和裂花受精在福瑞兔耳风、兔耳风等二型生殖系统植物中的后代补充作用。在田间和实验种群中对尖喙拟步行虫Leibnitzia abiculata和无尾拟步行虫Leibnitzia anandria进行了调查。分析了不同环境条件下CH和Cl种子产生的控制机制.对瓶蕨属（Ophioglossaceas）的自花受精系统进行了研究，并与被子植物进行了比较.基于这些新的证据和理论框架，探讨了植物自花交配系统在种群分化中的作用。