TABLE 3

Results from interval mapping (IM) without cofactors (simple IM) and from interval mapping with cofactors (IM with cofactors)

Simple IMIM with cofactors
BTATraitaFbpccFpcpgdPoseC.I.95fαgNo. GSh
05MY2.40.00502.80.00040.011127[19, 144]0.693
PY1.70.16302.00.03400.646117[21, 148]0.754
FP2.10.81002.50.01300.334127[17, 147]0.843
PP2.20.07472.60.00710.192142[39, 151]0.695
06SCS1.80.10282.00.04400.744 99[16, 135]0.454
PP2.00.12782.60.00820.219 52[21, 85]0.892
14iSCS2.30.00742.70.00120.035149[126, 149]0.712
18FY2.00.00962.10.00540.150139[77, 146]0.742
19FY2.20.01432.50.00070.021 57[20, 79]0.663
FP2.80.00392.50.01340.333 77[5, 115]0.623
PP2.10.07622.30.02750.567 77[7, 126]0.523
SCS2.10.02362.20.00950.249 58[7, 130]0.454
20FP1.40.56292.40.01350.335 61[40, 82]0.903
PP1.70.18892.40.00550.153 45[15, 73]0.664
23MY2.10.01862.00.02660.555 64[10, 76]0.503
FY1.80.03792.40.00040.012 64[1, 68]0.493
PY1.80.06441.80.04450.745 64[7, 76]0.363
26MY2.20.00452.40.00150.044 30[7, 37]0.652
FY2.40.00052.60.00010.003 30[15, 38]0.914
PY2.10.01172.20.00260.075 31[12, 43]0.672
  • a Trait abbreviations are MY, milk yield; FY, fat yield; PY, protein yield; FP, fat percentage; PP, protein percentage; and SCS, somatic cell score.

  • b F-test statistic.

  • c Chromosomewise error probability.

  • d Genomewise error probability.

  • e Estimated QTL position in centimorgans from the start of the chromosome. For flanking markers see estimated genetic maps available at http://www.tierzucht.uni-kiel.de/QTL_ADR_INRA.htm.

  • f 95% confidence interval.

  • g Average substitution effect.

  • h Number of heterozygous grandsires.

  • i BTA14 harbored genomewise significant QTL for all milk traits. The causal mutation of this QTL is known (Grisart et al. 2002; Winter et al. 2002); see Thaller et al. (2003) for the effects of the mutation in the German Holstein.