干旱区生态环境知识资源中心(Arid): Rarity does not limit genetic variation or preclude subpopulation structure in the geographically restricted desert forb Astragalus lentiginosus var. piscinensis

Arid

DOI	10.1002/ajb2.1235
	Rarity does not limit genetic variation or preclude subpopulation structure in the geographically restricted desert forb Astragalus lentiginosus var. piscinensis
	Harrison, Joshua G.1; Forister, Matthew L.2; Mcknight, Stephanie R.3; Nordin, Erin 4,5; Parchman, Thomas L.2
通讯作者	Harrison, Joshua G.
来源期刊	AMERICAN JOURNAL OF BOTANY
ISSN	0002-9122
EISSN	1537-2197
出版年	2019
卷号	106 期号:2 页码:260-269
英文摘要	Premise of the Study Characteristics of rare taxa include small population sizes and limited geographical ranges. The genetic consequences of rarity are poorly understood for most taxa. A small geographical range could result in reduced opportunity for isolation by distance or environment, thereby limiting genetic structure and variation, but few studies explore genetic structure at small spatial scales with sufficient resolution to test this hypothesis. Moreover, few comparative genetic studies exist among infrataxa differing in rarity. Here, we compare genetic variation among varieties of Astragalus lentiginosus differing in range size. Additionally, we ask if genetic structure exists in A. lentiginosus var. piscinensis, a rare taxon consisting of several thousand individuals that persist on similar to 8 km(2) of alkaline soil. Methods We compared genetic variation among 11 varieties of A. lentiginosus differing in range size using a genotyping by sequencing (GBS) approach, which generated 11,475 single nucleotide polymorphisms (SNPs). We characterized genetic structure among subpopulations of A. lentiginosus var. piscinensis using a second GBS data set of 7274 SNPs and explored associations between genetic structure and environmental variation. Key Results We found no association between genetic variation and range size among varieties of A. lentiginosus. Additionally, despite the extremely small range of A. lentiginosus var. piscinensis, we report a well-defined genetic structure among subpopulations associated with microhabitat variation in soil composition. Conclusions Our results suggest that fine scale genetic structure may exist within other rare Astragalus taxa and that rarity does not preclude the maintenance of genetic diversity in this genus.
英文关键词	Astragalus lentiginosus var. piscinensis genotyping by sequencing fine scale genetic structure Fabaceae isolation by distance isolation by environment conservation genetics rarity genetic consequences of rarity
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000459497400009
WOS关键词	LOCAL ADAPTATION ; POPULATION-SIZE ; READ ALIGNMENT ; DIVERSITY ; PLANT ; FABACEAE ; GENOMICS ; COMMON ; FLOW
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214117
作者单位	1.Univ Wyoming, Dept Bot, Laramie, WY 82071 USA; 2.Univ Nevada, Dept Biol, Reno, NV 89557 USA; 3.Xerces Soc, Portland, OR USA; 4.US Fish & Wildlife Serv, Bishop, CA USA; 5.Los Angeles Dept Water & Power, Los Angeles, CA USA
推荐引用方式 GB/T 7714	Harrison, Joshua G.,Forister, Matthew L.,Mcknight, Stephanie R.,et al. Rarity does not limit genetic variation or preclude subpopulation structure in the geographically restricted desert forb Astragalus lentiginosus var. piscinensis[J],2019,106(2):260-269.
APA	Harrison, Joshua G.,Forister, Matthew L.,Mcknight, Stephanie R.,Nordin, Erin,&Parchman, Thomas L..(2019).Rarity does not limit genetic variation or preclude subpopulation structure in the geographically restricted desert forb Astragalus lentiginosus var. piscinensis.AMERICAN JOURNAL OF BOTANY,106(2),260-269.
MLA	Harrison, Joshua G.,et al."Rarity does not limit genetic variation or preclude subpopulation structure in the geographically restricted desert forb Astragalus lentiginosus var. piscinensis".AMERICAN JOURNAL OF BOTANY 106.2(2019):260-269.