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Table 2 A description of the phenotype measurements used in the linkage analysis and their associated abbreviation

From: Discovery of quantitative trait loci for resistance to parasitic nematode infection in sheep: I. Analysis of outcross pedigrees

Abbreviation Description of phenotype measurement Units of measurement σp*
DAG0 Dag score at weaning 0–5 scale 0.56
DAG1 Dag score at the end of the first parasite challenge 0–5 scale 0.89
DAG2 Dag score at the end of the second parasite challenge 0–5 scale 0.82
ELISA1 IgG specific to T.colubriformis in serum collected at weaning OD490 using reference sera as standards 0.079
ELISA2 IgG specific to T.colubriformis in serum collected 4 weeks after weaning OD490 using reference sera as standards 0.095
ELISA3 IgG specific to T.colubriformis in serum collected at the end of the first parasite challenge OD490 using reference sera as standards 0.157
ELISA4 IgG specific to T.colubriformis in serum collected 4 weeks after the start of the second field challenge OD490 using reference sera as standards 0.158
ELISA5 IgG specific to T.colubriformis in serum collected at the end of the second field challenge OD490 using reference sera as standards 0.171
LAOST Log transformed estimates of T. circumcincta adults and late stage larvae found in the abomasum collected at slaughter at the end of the second parasite challenge Number of individuals 0.92
LATRICH Log transformed estimates of Trichostrongylus spp. adults and late stage larvae found in the abomasum collected at slaughter at the end of the second parasite challenge Number of individuals 0.69
LFEC1 Log transformed mean estimate of Strongyle eggs per gram of faecal material collected and measured 3 times over five days at the end of the first parasite challenge Number of eggs per gram of faeces 0.51
LFEC2 Log transformed mean estimate of Strongyle eggs per gram of faecal material collected and measured 3 times over five days at the end of the second parasite challenge Number of eggs per gram of faeces 0.68
LIGE Log transformed estimates of total IgE in serum collected at the end of the second parasite challenge OD450 using reference sera as standards 0.70
LSINEM Log transformed estimates of Nematadirus sp. adults and late stage larvae found in the small intestine collected at slaughter at the end of the second parasite challenge Number of individuals 1.22
LSITRI Log transformed estimates of Trichostrongylus spp. adults and late stage larvae found in the small intestine collected at slaughter at the end of the second parasite challenge Number of individuals 0.82
SNEM1 Scaled mean estimate of Nematodirus spp. eggs per gram of faecal material collected and measured 3 times over five days at the end of the first parasite challenge Number of eggs per gram of faeces 0.76
SNEM2 Scaled mean estimate of Nematodirus spp. eggs per gram of faecal material collected and measured 3 times over five days at the end of the second parasite challenge Number of eggs per gram of faeces 0.82
WTFEC2 Liveweight of lambs at the end of the second parasite challenge kilograms 3.63
  1. * σp = residual SD from a model containing all fixed effects including sire (but no marker effects).