TABLE 3

QTL detected in the F2 experiment

TraitChromosomeFlanking markersLODadGene actionAllelePVEPMSSDD
Macrohairs 2Cb1 umc259b2.615.82.2DAChalco6.0 27.8
 9Lumc192 umc9510.3410.82.1AChalco23.0 51.8
10Lumc64 umc259a4.256.60.8AChalco8.6 31.6
Pigment intensity 2Cb1 umc259b10.700.88−0.02AChalco17.9 94.6
 3Lumc63_—a19.101.14−0.39RAChalco32.8122.6
 4Lc2b4.350.49−0.16AChalco6.4 52.6
  • a The LOD curve is still rising at the terminal marker (see Figure 2).

  • b No markers flanking c2 were mapped (see Figure 2).

  • QTL positions are reported by chromosome with S and L indicating cytologically defined short and long arms and C denoting centromeric, as well as by the markers on each side of the LOD peak with the closer marker underlined. The peak LOD score under a hypothesis that allows both additive (a) and dominance (d) effects is given and those effect estimates are listed as trait unit contributions. Gene action is inferred from d/a: recessive (R) is for d/a < −0.67, recessive to additive (RA) for −0.67 > d/a > −0.33, additive (A) for −0.33 > d/a > 0.33, dominant to additive (DA) for 0.33 > d/a > 0.67, and dominant (D) for d/a > 0.67. The parental source of the allele, percentage of the phenotypic variance explained, and the percentage mean subspecies difference (PMSSD) are also listed for each QTL. PMSSD = 100 × [2a/MSSD]. The threshold LOD values for the two traits were 2.87 and 2.62, respectively.