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Table 5 Pairwise sequence divergence (p-dist) among fragments within each section of the IGS from ten individuals representing four species in the Daphnia pule x complex.

From: Evolution of the nuclear ribosomal DNA intergenic spacer in four species of the Daphnia pulex complex

Section label1 Nucleotide Position 22 Features OAM3p-dist MIA4p-dist (x) MIR5p-dist (y) p-dist ratio (x/y)
IGS 1 - 4339 entire IGS 0.028 [0.001]6 0.022 0.024 0.917
IGS-1 1 - 759 N1 0.037 [0.004] 0.026 0.035 0.743
IGS-2 759 - 1031 repeat consensus 0.078 [0.009] 0.078 0.083 0.940
IGS-3 1031 - 3150 N2 ~ 1340 core promoter ~3000 0.023 [0.002] 0.019 0.020 0.950
IGS-4 3150 - 3906   0.021 [0.003] 0.014 0.015 0.933
IGS-5 3906 - 4339   0.034 [0.005] 0.027 0.034 0.794
N1 1 - 841 entire N1 region 0.037 [0.004] 0.024 0.035 0.686
N1-1 1 - 170   0.001 [0.001] 0.001 0.001 1.0
N1-2 170 - 338   0.001 [0.001] 0.001 0.001 1.0
N1-3 338 - 503   0.057 [0.012] 0.040 0.053 0.755
N1-4 503 - 684   0.013 [0.004] 0.014 0.011 1.273
N1-5 684 - 841   0.036 [0.010] 0.017 0.034 0.500
N2 1-3022 entire N2 region 0.025 [0.001] 0.019 0.021 0.905
N2-1 1-657   0.019 [0.003] 0.016 0.017 0.941
N2-2 657-1515   0.023 [0.003] 0.019 0.023 0.826
N2-3 1515-2565 core promoter ~1660 0.024 [0.002] 0.017 0.017 1.0
N2-4 2565-3017   0.038 [0.005] 0.030 0.036 0.833
  1. 1. Fragments were defined by recombination analysis of multiple sequence alignments using the program GARD [44].
  2. 2. Nucleotide position in the multiple alignment.
  3. 3. Overall mean
  4. 4. Mean intraspecific
  5. 5. Mean interspecific.
  6. 6. Standard errors are given in square brackets.