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Genetic variation on mtDNA Cytb sequence of three populations of Chilean jack mackerel (Trachurus murphyi ) from the Southern Pacific Min ZHANG, Yong-jiu.

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Presentation on theme: "Genetic variation on mtDNA Cytb sequence of three populations of Chilean jack mackerel (Trachurus murphyi ) from the Southern Pacific Min ZHANG, Yong-jiu."— Presentation transcript:

1 Genetic variation on mtDNA Cytb sequence of three populations of Chilean jack mackerel (Trachurus murphyi ) from the Southern Pacific Min ZHANG, Yong-jiu XU, Cheng-hui WANG mzhang@shfu.edu.cn mzhang@shfu.edu.cn College of Marine Sciences College of Fishery and Life Science Shanghai Ocean University ， China)

2 Samples collection beyond Chile’s EEZ  OEZ2006—22 samples  OEZ2007---20 samples collected inside of Chile’s EEZ in 2006 ----bought from fish market of Valparaiso port.  IEZ2006 --- 4 samples

3 Species Sampling area Locality GeneBank Access ion No LatitudeLongitude Cytb T.murphyi OEZ2006 32°30.0′S 34°30.0′S 94°3 0.0 ′W 95°3 0.0 ′W fishing ground- T.murphyi OEZ2007 34°30.0′S 35°30.0′S 92°3 0.0 ′W 94°3 0.0 ′W fishing groundAY526538 T.murphyi IEZ2006 33°02.0′S 71°3 9.0 ′W Valparaiso port-

4 Results 11 haplotypes were found in 39 analyzed samples only one haplotype was shared among three populations, which has 23 polymorphic sites in analyzed 730 bp sequence.

5 3 and 22 polymorphic sites were detected in OEZ2006 and OEZ2007 respectively, No sequence variation was found in IEZ2006 The haplotype diversity ratios were 0.3309, 0.6405 and 0.0000; and nucleotide diversity ratios were 0.0005, 0.0043 and 0.0000 in OEZ2006, OEZ2007 and IEZ2006 respectively.

6 AMOVA analysis indicated that no significant genetic divergence among three populations. NJ tree showed that all individuals from three populations clustered into one clade. Conclusion: the three fish stocks of Chilean Jack mackerel inside and outside of EEZ in the Southern Pacific could be one population

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