Dispersal, mating events and fine-scale genetic structure in the lesser flat-headed bats

HUA Panyu; ZHANG Libiao; GUO Tingting; FLANDERS Jon; ZHANG Shuyi

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Dispersal, mating events and fine-scale genetic structure in the lesser flat-headed bats

HUA Panyu 1 * #,ZHANG Libiao 2,GUO Tingting 3,FLANDERS Jon 4,ZHANG Shuyi 5 #

1.Institute for Advanced Studies in Multidisciplinary Science and Technology, East China Normal University, ShangHai 200062

2.Guangdong Entomological Institute

3.nstitute for Advanced Studies in Multidisciplinary Science and Technology, East China Normal University

4.School of Biological Sciences, University of Bristol

5.Institute for Advanced Studies in Multidisciplinary Science and Technology, East China Normal University

*Correspondence author

#Submitted by

Subject:

Funding: 高等学校博士学科点专项科研基金（No.20090076120018）

Opened online:28 November 2012

Accepted by: none

Citation: HUA Panyu,ZHANG Libiao,GUO Tingting.Dispersal, mating events and fine-scale genetic structure in the lesser flat-headed bats[OL]. [28 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4497346

Population genetic structure has important consequences in evolutionary processes and conservation genetics in animals. Fine-scale population genetic structure depends on the pattern of landscape, the permanent movement of individuals, and the dispersal of their genes during temporary mating events. The lesser flat-headed bat (Tylonycteris pachypus) is a nonmigratory Asian bat species that roosts in small groups within the internodes of bamboo stems and the habitats are fragmented. Our previous parentage analyses revealed considerable extra-group mating in this species. To assess the spatial limits and sex-biased nature of gene flow in the same population, we used 20 microsatellite loci and mtDNA sequencing of the ND2 gene to quantify genetic structure among 54 groups of adult flat-headed bats, at nine localities in South China. AMOVA and FST estimates revealed significant genetic differentiation among localities. Alternatively, the pairwise FST values among roosting groups appeared to be related to the incidence of associated extra-group breeding, suggesting the impact of mating events on fine-scale genetic structure. Global spatial autocorrelation analyses showed positive genetic correlation for up to 3 km, indicating the role of fragmented habitat and the specialized social organization as a barrier in the movement of individuals among bamboo forests. The male-biased dispersal pattern resulted in weaker spatial genetic structure between localities among males than among females and, fine-scale analyses supported that relatedness levels within internodes were higher among females than among males. Finally, only females were more related to their same sex roost mates than to individuals from neighbouring roosts, suggestive of natal philopatry in females.

Keywords:ecology; lesser flat-headed bat; microsatellite; fine-scale genetic structure; dispersal; mating events

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