globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85059640413
论文题名:
Low siring success of females with an acquired male function illustrates the legacy of sexual dimorphism in constraining the breakdown of dioecy
作者: Santos del Blanco L.; Tudor E.; Pannell J.R.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2019
卷: 22, 期:3
起始页码: 486
结束页码: 497
语种: 英语
英文关键词: Dioecy ; functional hermaphroditism ; gain curves ; inflorescence architecture ; Mercurialis annua ; monoecy ; sex allocation ; sexual dimorphism
Scopus关键词: Magnoliophyta ; Mercurialis annua
英文摘要: Dioecy has often broken down in flowering plants, yielding functional hermaphroditism. We reasoned that evolutionary transitions from dioecy to functional hermaphroditism must overcome an inertia of sexual dimorphism, because modified males or females will express the opposite sexual function for which their phenotypes have been optimised. We tested this prediction by assessing the siring success of monoecious individuals of the plant Mercurialis annua with an acquired male function but that are phenotypically still female-like. We found that pollen dispersed by female-like monoecious individuals was ~ 1/3 poorer at siring outcrossed offspring than pollen from monoecious individuals with an alternative male-like inflorescence. We conclude that whereas dioecy might evolve from functional hermaphroditism by conferring upon individuals certain benefits of sexual specialisation, reversion from a strategy of separate sexes to one of combined sexes must overcome constraints imposed by the advantages of sexual dimorphism. The breakdown of dioecy must therefore often be limited to situations in which outcrossing cannot be maintained and where selection favours a capacity for inbreeding by functional hermaphrodites. © 2019 The Authors Ecology Letters published by CNRS and John Wiley & Sons Ltd
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122725
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作者单位: Department of Ecology and Evolution, Biophore Building, University of Lausanne, Lausanne, 1015, Switzerland; Department of Plant Sciences, University of Oxford, Oxford, OX1 3RB, United Kingdom; Sustainable Forest Management Research, Institute University of Valladolid – INIA, Avda. Madrid, Palencia, 34071, Spain; Biotecnología Forestal Aplicada, Calle Curtidores 17, Palencia, 34004, Spain; John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, United Kingdom

Recommended Citation:
Santos del Blanco L.,Tudor E.,Pannell J.R.. Low siring success of females with an acquired male function illustrates the legacy of sexual dimorphism in constraining the breakdown of dioecy[J]. Ecology Letters,2019-01-01,22(3)
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