Seasonal variation in the mating system of a selfing annual with large floral displays

doi:10.1093/aob/mcv186

	Seasonal variation in the mating system of a selfing annual with large floral displays
	Yin, Ge ; Barrett, Spencer C. H.; Luo, Yi-Bo; Bai, Wei-Ning
	2016
发表期刊	ANNALS OF BOTANY
ISSN	0305-7364
卷号	117 期号:3 页码:391-400
摘要	Background and Aims Flowering plants display considerable variation in mating system, specifically the relative frequency of cross-and self-fertilization. The majority of estimates of outcrossing rate do not account for temporal variation, particularly during the flowering season. Here, we investigated seasonal variation in mating and fertility in Incarvillea sinensis (Bignoniaceae), an annual with showy, insect-pollinated, 'one-day' flowers capable of delayed selfing. We examined the influence of several biotic and abiotic environmental factors on day-to-day variation in fruit set, seed set and patterns of mating. Methods We recorded daily flower number and pollinator abundance in nine 3 x 3-m patches in a population at Mu Us Sand land, Inner Mongolia, China. From marked flowers we collected data on daily fruit and seed set and estimated outcrossing rate and biparental inbreeding using six microsatellite loci and 172 open-pollinated families throughout the flowering period. Key Results Flower density increased significantly over most of the 50-d flowering season, but was associated with a decline in levels of pollinator service by bees, particularly on windy days. Fruit and seed set declined over time, especially during the latter third of the flowering period. Multilocus estimates of outcrossing rate were obtained using two methods (the programs MLTR and BORICE) and both indicated high selfing rates of similar to 80 %. There was evidence for a significant increase in levels of selfing as the flowering season progressed and pollinator visitation declined. Biparental inbreeding also declined significantly as the flowering season progressed. Conclusions Temporal variation in outcrossing rates may be a common feature of the mating biology of annual, insect-pollinated plants of harsh environments but our study is the first to examine seasonal mating-system dynamics in this context. Despite having large flowers and showy floral displays, I. sinensis attracted relatively few pollinators. Delayed selfing by corolla dragging largely explains the occurrence of mixed mating in I. sinensis, and this mode of self-fertilization probably functions to promote reproductive assurance when pollinator service is limited by windy environmental conditions and competition from co-occurring flowering plants.
关键词	corolla dragging delayed selfing Incarvillea mixed mating pollinator service reproductive assurance sand desert
学科领域	Plant Sciences
DOI	10.1093/aob/mcv186
收录类别	SCI
语种	英语
WOS关键词	REPRODUCTIVE ASSURANCE ; POLLEN LIMITATION ; INBREEDING DEPRESSION ; CROSS-FERTILIZATION ; PLANT REPRODUCTION ; TEMPORAL VARIATION ; POLLINATION ; EVOLUTION ; MECHANISM ; POPULATIONS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000371690500003
出版者	OXFORD UNIV PRESS
文献子类	Article
出版地	OXFORD
EISSN	1095-8290
资助机构	Youth Foundation of Institute of Botany, CASChinese Academy of Sciences [1101166] ; Natural Sciences and Engineering Council of CanadaNatural Sciences and Engineering Research Council of Canada (NSERC)
作者邮箱	baiwn@bnu.edu.cn
作品OA属性	Bronze, Green Published
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25062
专题	系统与进化植物学国家重点实验室
作者单位	1.[Yin, Ge 2.Beijing Normal Univ, Coll Life Sci, Key Lab Biodivers Sci & Ecol Engn, Minist Educ, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 4.[Barrett, Spencer C. H.] Univ Toronto, Dept Ecol & Evolutionary Biol, 25 Willcocks St, Toronto, ON M5S 3B2, Canada
推荐引用方式 GB/T 7714	Yin, Ge,Barrett, Spencer C. H.,Luo, Yi-Bo,et al. Seasonal variation in the mating system of a selfing annual with large floral displays[J]. ANNALS OF BOTANY,2016,117(3):391-400.
APA	Yin, Ge,Barrett, Spencer C. H.,Luo, Yi-Bo,&Bai, Wei-Ning.(2016).Seasonal variation in the mating system of a selfing annual with large floral displays.ANNALS OF BOTANY,117(3),391-400.
MLA	Yin, Ge,et al."Seasonal variation in the mating system of a selfing annual with large floral displays".ANNALS OF BOTANY 117.3(2016):391-400.

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