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Population genetic structure of three tree species in the mangrove genus Ceriops (Rhizophoraceae) from the Indo West Pacific
Yelin Huang 1 * #,Fengxiao Tan 2,Guohua Su 3,Shulin Deng 1,Suhua Shi 1
1.State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University
2.College of Agronomy, South China Agricultural University
3.South China Botanical Garden, Chinese Academy of Sciences, Guangzhou
*Correspondence author
#Submitted by
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Funding: none
Opened online:19 March 2007
Accepted by: none
Citation: Yelin Huang,Fengxiao Tan,Guohua Su.Population genetic structure of three tree species in the mangrove genus Ceriops (Rhizophoraceae) from the Indo West Pacific[OL]. [19 March 2007] http://en.paper.edu.cn/en_releasepaper/content/11503
 
 
Ceriops is a viviparous mangrove with widespread species C. decandra and C. tagal, and the endemic species C. australis. Genetic diversity of the three species was screened in 31 populations collected from 22 locations in the Indo West Pacific using ISSR and sequences of partial nuclear gene (G3pdh) and chloroplast DNA (trnV-trnM). At the species level, the estimate of gene diversity (Ht) in C. decandra was 0.270, much higher than that in C. tagal (0.118) and C. australis (0.089) revealed by ISSRs. Heterozygous individuals were detected from one single population of C. tagal based on G3pdh sequences. Only C. decandra (four G3pdh haplotypes and three trnV-trnM haplotypes) was presented having more than one haplotype inferred from each DNA sequences data set. No haplotype diversity within population was detected in any of the three species, with the exception of the hybrid population. Three major geographical groups, correspond to the East Indian Ocean (EIO), South China Sea (SCS), and North Australia (NA) were identified in both C. decandra and C. tagal based on ISSRs. DNA sequences of C. decandra also detected the same three geographical groups by SAMOVA. Significant spatial genetic structure from populations between the three regions were detected, which may result from the historical geological events at these regions during the recent Pleistocene glaciations. This study also provided insights into the phylogenetics of Ceriops.
Keywords:Ceriops australis； C. decandra； C. tagal； genetic structure； G3pdh； ISSR； trnV-trnM.
 
 
 

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