Abstract
Here we used both microsatellites and mtCR (mitochondrial DNA control region) sequences as genetic markers to examine the genetic diversity and population structure of Penaeus monodon shrimp from six Indonesian regions. The microsatellite data showed that shrimp from the Indian and the Pacific Ocean were genetically distinct from each other. It has been reported previously that P. monodon mtCR sequences from the Indo-Pacific group into two major paralogous clades of unclear origin. Here we show that the population structure inferred from mtCR sequences matches the microsatellite-based population structure for one of these clades. This is consistent with the notion that this mtCR clade shares evolutionary history with nuclear DNA and may thus represent nuclear mitochondrial pseudogenes (Numts).
Highlights
Penaeus monodon (Fig. 1) is a marine crustacean widely cultured in the Indo-Pacific, especially in the Indonesian coastal region (Holthuis 1976)
We used both microsatellites and mtCR sequences as genetic markers to examine the genetic diversity and population structure of Penaeus monodon shrimp from six Indonesian regions
DNA from 90 of the 115 P. monodon samples from six locations was successfully genotyped at the 15 microsatellite loci targeted
Summary
Penaeus monodon (black tiger shrimp) (Fig. 1) is a marine crustacean widely cultured in the Indo-Pacific, especially in the Indonesian coastal region (Holthuis 1976). In order to improve the output of local farmers as well as to understand the effect of this exponential growth of production of P. monodon in Indonesian waters, it is necessary to better understand the structure and migration patterns of wild shrimp populations in these waters. Studies carried out during the last two decades aimed at better understanding the underlying population structures, phylogenetic relationships, and geographic distributions of various marine organisms inhabiting the Indonesian coastal region have consistently found this region to be a major center of marine biodiversity (Klinbunga et al 1998; Benzie et al 2002; Sugama et al 2002).
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