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Table 2 Observed numbers of convergent and parallel sites and expected numbers of convergent and parallel sites under neutral evolution. JTT-fsite model of amino acid substitution is used and all numbers are calculated using dataset 1. For low-elevation species, only sister-group species of the high-elevation species (Fig. 1) are presented here

From: Molecular convergent and parallel evolution among four high-elevation anuran species from the Tibetan region

  Species pair Observed convergent and parallel sites Expected convergent and parallel sites Rconv
High B. tibetanus-S. boulengeri 77 53.794 1.431
N. parkeri-B. tibetanus 52 54.297 0.958
N. parkeri-S. boulengeri 37 77.863 0.475
R. kukunoris-B. tibetanus 16 14.012 1.142
R. kukunoris-N. parkeri 85 52.357 1.623
R. kukunoris-S. boulengeri 28 17.619 1.589
Low B. gargarizans-O. popei 12 24.961 0.481
N. yunnanensis-O. popei 17 40.400 0.421
N. yunnanensis-B. gargarizans 6 26.990 0.222
R. chensinensis-O. popei 5 11.201 0.446
R. chensinensis-B. gargarizans 0 7.214 0.000
R. chensinensis-N. yunnanensis 12 17.004 0.706