Genetic Structure of Seriatopora hystrix Populations in Different Geographic Scales
Date Issued
2014
Date
2014
Author(s)
Chen, Yi-Hsuan
Abstract
It has been hypothesized that the isolation-by-distance effect and ecological selection could lead to high level of population subdivision in different spatial scales. Here we investigated the genetic diversity and genetic structure of a common brooding coral Seriatopora hystrix in various geographic scales in Taiwan by using 6 microsatellite markers. Totally, 285 samples were collected from 7 sites including Taiping Island in the South China Sea, the outlet of the Third Nuclear Power Plant, Tiaoshi and Jialeshuei in Kenting National Park, Lanyu and Sanxiantai in Taitung County, and Tofujia in Yilan County. Our results showed that the population of Taiping Island had higher genetic diversity and two unique genetic clusters could be identified. Significant genetic differentiation was detected among all populations at both small (3~25 km) and large (> 1700 km) geographic scales, and this pattern was not associated with geographic distance (r2 = 0.030, p = 0.705). This study demonstrates that the isolation-by-distance effect may be modified by ecological selection or interactions between environmental factors and life history traits.
Subjects
尖枝列孔珊瑚
微衛星
遺傳多樣性
遺傳結構
Type
thesis
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