Deep structured populations of geographically isolated nipa (Nypa fruticans Wurmb.) in the Indo-West Pacific revealed using microsatellite markers
Issued Date
2022-10-25
Resource Type
eISSN
1664462X
Scopus ID
2-s2.0-85141441221
Journal Title
Frontiers in Plant Science
Volume
13
Rights Holder(s)
SCOPUS
Bibliographic Citation
Frontiers in Plant Science Vol.13 (2022)
Suggested Citation
Mantiquilla J.A., Shiao M.S., Lu H.Y., Sridith K., Sidique S.N.M., Liyanage W.K., Chu Y.L., Shih H.C., Chiang Y.C. Deep structured populations of geographically isolated nipa (Nypa fruticans Wurmb.) in the Indo-West Pacific revealed using microsatellite markers. Frontiers in Plant Science Vol.13 (2022). doi:10.3389/fpls.2022.1038998 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/83112
Title
Deep structured populations of geographically isolated nipa (Nypa fruticans Wurmb.) in the Indo-West Pacific revealed using microsatellite markers
Author's Affiliation
Other Contributor(s)
Abstract
Nipa (Nypa fruticans Wurmb.) is an important mangrove palm species, but it is understudied due to lack of information on genetic patterns within its distribution range. In this study, we identified 18 informative microsatellite markers to assess genetic variations among local populations in the Indo-West Pacific (IWP). Results showed population stratification based on high genetic differentiation (FST = 0.22131) with the Mantel test indicating significance to isolation-by-distance. We found a pronounced differentiation between the west populations in Sri Lanka and east populations in Southeast Asia. The east populations around the South China Sea were more genetically similar than those along the Malacca Strait and Java Sea. These genetic clines were shaped by ocean circulations and seasonal monsoon reversals as plausible factors. The Malacca Strait was confirmed as both a genetic and a geographic barrier rather than a corridor according to the Monmonier plot. Simulations of directional migration indicated a statistically strong contemporary genetic connectivity from west to east where Sri Lankan immigrants were detected as far as central Philippines via long-distance dispersal. This is the first report on the recent migration patterns of nipa using microsatellites. Assignment of first-generation (F0) immigrants suggested Mainland Southeast Asia as a melting pot due to the admixture associated with excess of homozygosity. The western populations were recent expansions that emerged in rapid succession based on a phylogram as supported by footprints of genetic drift based on bottleneck tests.