Table 1. Subspecies differences in expression† of each mass peak by sex and origin (contact/allopatric).
| Mass peak | Female contact | Female allopatric | Male contact | Male allopatric |
|---|---|---|---|---|
| 18575 Da | X2 = 20.62, p < 0.0001*musculus only(52%) | X2 = 3.33, p = 0.12musculus only(33%) | X2 = 14.64, p = 0.0001*musculus only(63%) | X2 = 11.56, p = 0.002*musculus only(62%) |
| 18646 Da | n.d.‡ | X2 = 1.58, p = 0.40domesticus only(13%) | n.d. | X2 = 7.80, p = 0.015domesticus only(46%) |
| 18651 Da | X2 = 53.13, p < 0.0001*domesticus only(97%) | n.d. | X2 = 26.66, p < 0.0001*domesticus only(87%) | n.d. |
| 18666 Da | X2 = 21.80, p < 0.0001*domesticus only(57%) | z = 0.15, p = 0.91domesticus [0.015],musculus [0.014] | X2 = 15.50, p < 0.0001*domesticus only(60%) | z = 3.51, p = 0.0004*domesticus [0.020] > musculus [0.004] |
| 18679 Da | X2 = 26.92, p < 0.0001*musculus only(63%) | X2 = 20.00, p < 0.0001*musculus only(100%) | X2 = 18.79, p < 0.0001*musculus only(74%) | X2 = 26.00, p < 0.0001*musculus only(100%) |
| 18682 Da | X2 = 43.03, p < 0.0001*domesticus only(87%) | X2 = 10.00, p = 0.004domesticus only(63%) | X2 = 26.66, p < 0.0001*domesticus only(87%) | X2 = 13.77, p = 0.0002*domesticus only(69%) |
| 18694 Da | z = 2.16, p = 0.031musculus [0.28] > domesticus [0.18] | z = 3.70, p = 0.0002*domesticus [0.56] > musculus [0.16] | z = 1.96, p = 0.051 domesticus [0.12] > musculus [0.10] | z = 4.33, p < 0.0001*domesticus [0.46] > musculus [0.13] |
| 18708 Da | z = 6.46, p < 0.0001*domesticus [0.28] > musculus [0] | X2 = 12.86, p = 0.001*domesticus [0.10] > musculus [0] | z = 5.01, p < 0.0001*domesticus [0.44] > musculus [0] | z = 2.67, p = 0.005domesticus [0.06] > musculus [0] |
| 18711 Da | X2 = 42.84, p < 0.0001* musculus only (85%) | z = 0.61, p = 0.59 domesticus [0], musculus [0] | X2 = 8.26, p = 0.005 musculus only (42%) | z = 1.60, p = 0.096 domesticus [0.02], musculus [0] |
| 18713 Da | n.d. | z = 1.36, p = 0.20domesticus [0],musculus [0.028] | n.d. | z = 0.95, p = 0.38domesticus [0.001],musculus [0] |
| 18716 Da | n.d. | X2 = 2.35, p = 0.24 musculus only (25%) | n.d. | X2 = 7.80, p = 0.015 musculus only (46%) |
| 18724 Da | X2 = 32.25, p < 0.0001*domesticus only(73%) | X2 = 20.00, p < 0.0001*domesticus only(100%) | X2 = 30.15, p < 0.0001*domesticus only(93%) | X2 = 13.77, p = 0.0002*domesticus only(69%) |
| 18731 Da | X2 = 57.00, p < 0.0001*musculus only(100%) | z = 3.70, p = 0.0002*musculus [0.18] > domesticus[0.01] | X2 = 34.00, p < 0.0001*musculus only(100%) | z = 4.13, p < 0.0001*musculus [0.29] > domesticus [0] |
| 18752 Da | X2 = 36.94, p < 0.0001*musculus only(78%) | X2 = 7.18, p = 0.015musculus only(58%) | X2 = 34.00, p < 0.0001*musculus only(100%) | X2 = 26.00, p < 0.0001*musculus only(100%) |
†z values from Mann-Whitney U tests examine subspecies differences in the relative amount of each peak, expressed as a proportion of all central MUPs expressed in each sample (median values in square brackets, full data shown in Fig. 6), for mass peaks that were observed in samples from both sub-species. Contingency chi-squared test the frequency of expression (presence/absence) where a mass peak was observed in samples from one subspecies but not in the other subspecies. Presence was recorded only for peaks that were 5% or more of the highest peak in the profile to ensure this reflected real expression rather than baseline noise (% samples meeting this criterion shown in parentheses).
‡n.d. = not detected in samples from either subspecies. *P values that would still be statistically significant after sequential Bonferroni adjustment.