BIOL2609_L19_2007

16 111 phylogeographic analysis genetic variability

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Unformatted text preview: differed by 1-2 restriction site changes (nucleotide sequence divergence measured at 0.16-1.11%) • Phylogeographic analysis: genetic variability vs location • Revealed shallow structuring, consistent with evolutionarily recent restrictions to gene flow Striped marlin mtDNA haplotypes location Haplotype Mexico Ecuador Hawaii Australia A B C D E F G Unique Totals 12 6 8 0 0 0 6 4 36 20 6 9 2 1 1 0 1 40 14 7 4 10 2 0 0 6 43 12 3 1 8 7 11 0 5 47 Phylogeographic map of Pacific striped marlin Based upon 166 marlin samples, RFLP using 11 restriction endonucleases, circle size proportional to abundance of haplotype (smallest circle = 2 individuals) White marlin • Very similar to striped marlin • Atlantic distribution only • RFLP analysis of mtDNA from 3 sites (~15 fish per site) revealed no significant heterogeneity among white marlin (Graves & McDowell 1995) – unlike the striped marlin considered in the previous example • HOWEVER – white marlin territory overlaps with that of the striped marlin around South Africa – Two haplotypes are common to both species, acounting for 87% and 25% r...
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This note was uploaded on 03/19/2010 for the course DEB BIOL2609 taught by Professor Drstephenb.pointing during the Spring '10 term at HKU.

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