干旱区生态环境知识资源中心(Arid): Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia

Arid

DOI	10.1093/jhered/esz043
	Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia
	Forrest, Cairo N.; Roberts, David G.; Denham, Andrew J.; Ayre, David J.
通讯作者	Ayre, DJ (corresponding author), Univ Wollongong, Sch Earth Atmospher & Life Sci, Wollongong, NSW 2522, Australia.
来源期刊	JOURNAL OF HEREDITY
ISSN	0022-1503
EISSN	1465-7333
出版年	2019
卷号	110 期号:6 页码:738-745
英文摘要	Clonality may provide reproductive assurance for many threatened plants while limiting sexual reproductive success either through energetic tradeoffs or because clones are self-incompatible. Most stands of the Australian arid-zone plant Acacia carneorum, flower annually but low seed set and an absence of sexual recruitment now suggest that this species and other, important arid-zone ecosystem engineers may have low genotypic diversity. Indeed, our recent landscape-scale genetic study revealed that stands are typically monoclonal, with genets usually separated by kilometers. An inability to set sexually produced seed or a lack of genetically diverse mates may explain almost system-wide reproductive failure. Here, using microsatellite markers, we genotyped 100 seeds from a rare fruiting stand (Middle-Camp), together with all adult plants within it and its 4 neighboring stands (up to 5 km distant). As expected, all stands surveyed were monoclonal. However, the Middle-Camp seeds were generated sexually. Comparing seed genotypes with the single Middle-Camp genotype and those of genets from neighboring and other regional stands (n = 26), revealed that 73 seeds were sired by the Middle-Camp genet. Within these Middle-Camp seeds we detected 19 genotypes in proportions consistent with self-fertilization of that genet. For the remaining 27 seeds, comprising 8 different genotypes, paternity was assigned to the nearest neighboring stands Mallee and Mallee-West, approximately 1 km distant. Ironically, given this species' vast geographic range, a small number of stands with reproductively compatible near neighbors may provide the only sources of novel genotypes.
英文关键词	arid zone clonal outcrossing pollen dispersal polyploid selfing
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000493110700010
WOS关键词	GENETIC DIVERSITY ; REPRODUCTIVE SUCCESS ; SEXUAL REPRODUCTION ; GENOTYPIC DIVERSITY ; SMALL POPULATIONS ; CLONAL PLANT ; SEED-SET ; CONSERVATION ; POLLINATION ; LIMITATION
WOS类目	Evolutionary Biology ; Genetics & Heredity
WOS研究方向	Evolutionary Biology ; Genetics & Heredity
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369605
作者单位	[Forrest, Cairo N.; Roberts, David G.; Denham, Andrew J.; Ayre, David J.] Univ Wollongong, Sch Earth Atmospher & Life Sci, Wollongong, NSW 2522, Australia; [Denham, Andrew J.] New South Wales Off Environm & Heritage, Hurstville, NSW, Australia
推荐引用方式 GB/T 7714	Forrest, Cairo N.,Roberts, David G.,Denham, Andrew J.,et al. Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia[J],2019,110(6):738-745.
APA	Forrest, Cairo N.,Roberts, David G.,Denham, Andrew J.,&Ayre, David J..(2019).Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia.JOURNAL OF HEREDITY,110(6),738-745.
MLA	Forrest, Cairo N.,et al."Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia".JOURNAL OF HEREDITY 110.6(2019):738-745.