Demographic bottlenecks and low gene flow in remnant populations of the critically endangered Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) inferred from microsatellite markers

doi:10.1007/s10592-007-9324-0

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	Demographic bottlenecks and low gene flow in remnant populations of the critically endangered Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) inferred from microsatellite markers
	Huang, Hongwen 1; Kang, Ming 2; Wang, Jing 2
刊名	CONSERVATION GENETICS
	2008-02-01
卷号	9 期号:1 页码:191-199
关键词	assignment test Berchemiella wilsonii var. pubipetiolata equilibrium gene flow microsatellite
ISSN号	1566-0621
DOI	10.1007/s10592-007-9324-0
英文摘要	Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) is an endangered plant with only four remnant populations in eastern China. Population genetic information is essential for understanding population history and formulating conservation strategies for this species. Thirteen microsatellite loci were used to investigate genetic variation and population structure of the four remnant populations. Moderate levels of expected heterozygosity (H-E = 0.466-0.543) and low allelic diversity (A = 3.1-3.6 and A(R) = 2.2-2.4, respectively) were observed within populations. Bottleneck tests found three out of four populations to deviate from mutation-drift equilibrium under the two-phase model (TPM), suggesting a recent population decline, which is congruent with known demographic history. The evolutionary history of the species seems dominated by genetic drift rather than gene flow. Low historical gene flow was inferred from several different approaches and N-m ranged from 0.582 by the private allele method to 0.783 by the coalescent method. Contemporary gene flow was also found to be even lower for only one first generation migrant was detected with individual-based assignment analysis. Restricted pollen and seed dispersal as well as a recent decline in population size associated with habitat fragmentation may have contributed to low levels of historical and contemporary gene flow, and resulted in a high genetic differentiation. Under this scenario, Berchemiella wilsonii var. pubipetiolata populations are expected to display more pronounced population genetic structure in the future as a result of increased inbreeding and genetic drift.
WOS研究方向	Biodiversity & Conservation ; Genetics & Heredity
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000252223100017
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/1111]
专题	中国科学院武汉植物园
通讯作者	Huang, Hongwen
作者单位	1.Chinese Acad Sci, S China Inst Bot, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China 2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Huang, Hongwen,Kang, Ming,Wang, Jing. Demographic bottlenecks and low gene flow in remnant populations of the critically endangered Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) inferred from microsatellite markers[J]. CONSERVATION GENETICS,2008,9(1):191-199.
APA	Huang, Hongwen,Kang, Ming,&Wang, Jing.(2008).Demographic bottlenecks and low gene flow in remnant populations of the critically endangered Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) inferred from microsatellite markers.CONSERVATION GENETICS,9(1),191-199.
MLA	Huang, Hongwen,et al."Demographic bottlenecks and low gene flow in remnant populations of the critically endangered Berchemiella wilsonii var. pubipetiolata (Rhamnaceae) inferred from microsatellite markers".CONSERVATION GENETICS 9.1(2008):191-199.