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Table 2 Mate choice information table

From: Prezygotic reproductive isolation between Saccharomyces cerevisiae and Saccharomyces paradoxus

Pair "chooser" strain Total trials as "chooser" Total zygotes formed Observed number of hybrid zygotes Expected number of hybrid zygotesa Hybrid zygote χ2 (p value)b Always own species χ2 (p value)c Mating propensityd Mating Prospensity χ2 (p value)
1 Sc1 300 115 49 76.67 28.89 (<0.001) 4.882943 (0.0271) 51.11 1.035 (0.3089)
  Sp1 206 69 34 46 8.63 (0.0033) 8.628882 (0.0033) 44.66  
2 Sc2 270 88 28 58.67 31.82 (<0.001) 0.035264 (0.8510) 43.46 2.212 (0.1369)
  Sp2 220 85 47 56.67 4.45 (0.0349) 19.4555 (<0.0001) 51.51  
3 Sc3 250 70 22 46.67 31.42 (<0.001) 0.044643 (0.8327) 37.33 0.164 (0.6857)
  Sp3 344 90 42 60 15.31 (<0.001) 7.8125 (0.0052) 34.88  
4 Sc4 210 78 25 52 40.51 (<0.001) 0.014423 (0.9044) 49.52 0.0046 (0.9462)
  Sp4 220 80 38 53.33 12.38 (<0.001) 7.876563 (0.005) 48.48  
5 Sc5 240 90 26 60 56.13 (<0.001) 0.877974 (0.3488) 50.00 2.229 (0.1355)
  Sp5 260 80 33 53.33 22.13 (<0.001) 2.626563 (0.1051) 41.03  
  1. Table showing the raw data obtained from the mate choice trials as well as the hybrid zygote and mating propensity χ2 values.
  2. a– The expected number of hybrid zygotes if no mating preference exists between the two species (2/3 total – see Methods)
  3. b– χ2 test on the number of hybrid zygotes observed compared to the number expected if there is no mate preference (Yates corrected) (see also Figure 2).
  4. c– χ2 test on the number of hybrid zygotes observed compared to the 1/3 expected under the "always choose own species" model. (see Figures 1 and Methods)
  5. d– Percentage of mating trials producing zygotes after correcting for the 25% of trials that cannot form zygotes because all three spores are the same mating type (see Methods).).
  6. e– χ2 test for the effect of species in pair on mating propensity (Yates corrected).