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Table 2 Association between a range of milk production variables in cows and (i) replacing a T allele with a C allele in the TLR4-2021 SNP (standard error in parenthesis), and (ii) TLR4-2021 genotypes

From: Polymorphisms in bovine immune genes and their associations with somatic cell count and milk production in dairy cattle

     Genotype1  
Trait Mean Trait Value2 Allele Substitution (T→C) P-value TT TC CC P-value
Milk Yield (kg) 4455 (1200) -65.7 (137.9) NS 0 -22.81 (226.7) -96.04 (282.8) NS
Protein Yield (kg) 164 (40) -3.86 (4.56) NS 0 -1.64 (7.48) -6.24 (9.34) NS
Fat Yield (kg) 197 (51) -4.88 (5.25) NS 0 1.24 (8.63) -7.01 (10.77) NS
Lactose Yield (kg) 206 (52) -1.29 (5.83) NS 0 -1.68 (9.55) -1.63 (11.93) NS
Protein Percentage3 (*1000) 36 (3) -0.39 (0.19) < 0.05 0 0.03 (0.32) -0.63 (0.39) < 0.05
Fat Percentage3 (*1000) 44 (8) -0.69 (0.44) NS 0 0.77 (0.72) - 0.97 (0.9) < 0.01
SCS (loge SCC) 1.67 (0.46) -0.05 (0.05) NS 0 -0.08 (0.07) -0.11 (0.09) NS
  1. 1 Referent class is the TT genotype and is compared with the CT and CC genotype
  2. 2 Mean values observed for each phenotype investigated (standard deviation in parenthesis)
  3. 3 A value of 1, before multiplication, equates to 1 percentage unit
  4. NS = Not significant