Genotyping of microsatellite markers to study genetic structure of the wild striped snakehead Channa striata in Malaysia. Issue 5 (29th March 2016)

• Record Type: Journal Article
• Authors: Tan, M. P.; Jamsari, A. F. J.; Siti Azizah, M. N.
• Is Part Of: Journal of fish biology. Volume 88:Issue 5(2016)
• Page Start: 1932
• Page End: 1948
• Publication Date: 2016-03-29
• Subjects: anthropogenic factor -- conservation -- freshwater fish -- genetic diversity -- isolation by distance -- nuclear DNA; Fishes -- Periodicals; Fishes -- Great Britain -- Periodicals; 597
• DOI: 10.1111/jfb.12956
• Languages: English
• ISSNs: 0022-1112

Abstract

Abstract : Genetic variability and differences in wild striped snakehead Channa striata from Malaysia were analysed by genotyping nine novel nuclear microsatellite loci. Analysis revealed moderate‐to‐high genetic diversity in most of the populations, indicative of large effective population sizes. The highly diversified populations are admixed populations and, therefore, can be recommended as potential candidates for selective breeding and conservation since they each contain most of the alleles found in their particular region. Three homogenous groups of the wild populations were identified, apparently separated by effective barriers, in accordance with contemporary drainage patterns. The highest population pairwise F ST found between members of the same group reflects the ancient population connectivity; yet prolonged geographical isolation resulted in adaptation of alleles to local contemporary environmental change. A significant relationship between genetic distance and geographical isolation was observed ( r = 0·644, P < 0·01). Anthropogenic perturbations indicated apparent genetic proximity between distant populations.