{"title":"费雪的自交优势并不适用于一夫一妻制物种。","authors":"Pierre-Olivier Cheptou","doi":"10.1002/ajb2.16390","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Premise</h3>\n \n <p>In hermaphroditic plants, the evolution of self-fertilization is driven by two major forces; the cost of outcrossing or Fisher's automatic advantage of selfing and inbreeding depression. Seminal theoretical works have established that an inbreeding depression threshold of 0.5 governs the evolution. Below that threshold, selfing evolves, above that, outcrossing evolves. Does this threshold apply to cleistogamous plants?</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>I developed a model using a Lloydian approach to analyze the evolution of cleistogamy.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>I showed that the inbreeding depression threshold does not apply in cleistogamous species, and that because cleistogamous (closed) flowers do not export pollen, Fisher's advantage of selfing is totally cancelled.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>In line with model predictions, I discuss the fact that cleistogamous species often exhibit low inbreeding depression in empirical studies.</p>\n </section>\n </div>","PeriodicalId":7691,"journal":{"name":"American Journal of Botany","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fisher's automatic advantage of self-fertilization does not apply in cleistogamous species\",\"authors\":\"Pierre-Olivier Cheptou\",\"doi\":\"10.1002/ajb2.16390\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Premise</h3>\\n \\n <p>In hermaphroditic plants, the evolution of self-fertilization is driven by two major forces; the cost of outcrossing or Fisher's automatic advantage of selfing and inbreeding depression. Seminal theoretical works have established that an inbreeding depression threshold of 0.5 governs the evolution. Below that threshold, selfing evolves, above that, outcrossing evolves. Does this threshold apply to cleistogamous plants?</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>I developed a model using a Lloydian approach to analyze the evolution of cleistogamy.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>I showed that the inbreeding depression threshold does not apply in cleistogamous species, and that because cleistogamous (closed) flowers do not export pollen, Fisher's advantage of selfing is totally cancelled.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusions</h3>\\n \\n <p>In line with model predictions, I discuss the fact that cleistogamous species often exhibit low inbreeding depression in empirical studies.</p>\\n </section>\\n </div>\",\"PeriodicalId\":7691,\"journal\":{\"name\":\"American Journal of Botany\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2024-08-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"American Journal of Botany\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/ajb2.16390\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"American Journal of Botany","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ajb2.16390","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
Fisher's automatic advantage of self-fertilization does not apply in cleistogamous species
Premise
In hermaphroditic plants, the evolution of self-fertilization is driven by two major forces; the cost of outcrossing or Fisher's automatic advantage of selfing and inbreeding depression. Seminal theoretical works have established that an inbreeding depression threshold of 0.5 governs the evolution. Below that threshold, selfing evolves, above that, outcrossing evolves. Does this threshold apply to cleistogamous plants?
Methods
I developed a model using a Lloydian approach to analyze the evolution of cleistogamy.
Results
I showed that the inbreeding depression threshold does not apply in cleistogamous species, and that because cleistogamous (closed) flowers do not export pollen, Fisher's advantage of selfing is totally cancelled.
Conclusions
In line with model predictions, I discuss the fact that cleistogamous species often exhibit low inbreeding depression in empirical studies.
期刊介绍：
The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.
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