Table 3

Genetic correlations between fertility and production traits
MY60 MY305 FY60 FY305 PY60 PY305 FC60 FC305 PC60 PC305
RZR −0.24*** −0.26 *** −0.19 *** −0.20 *** −0.23 *** −0.28 *** 0.003 0.07** 0.05† 0.02
CON −0.14*** −0.17 *** −0.11 *** −0.11 *** −0.16 *** −0.20 *** 0.005 0.06* −0.01 −0.02
FLh −0.09 *** −0.11 *** −0.11 *** −0.09 *** −0.10 *** −0.13 *** −0.04 0.03 −0.003 −0.01
FLc −0.24 *** −0.27 *** −0.20 *** −0.22 *** −0.22 *** −0.29 *** −0.01 0.06* 0.06* 0.03
NRh −0.04† −0.08** −0.02 −0.02 −0.08** −0.11*** 0.02 0.05* −0.05† −0.03
NRc −0.06* −0.07** −0.03 −0.03 −0.09*** −0.11*** 0.03 0.04† −0.04† −0.05†
CFc −0.32*** −0.33*** −0.26*** −0.27*** −0.24*** −0.31*** 0.003 0.07** 0.17*** 0.12***
DO −0.33*** −0.36*** −0.27*** −0.29*** −0.27*** −0.35*** −0.004 0.08** 0.14*** 0.09***

P-values *** < 0.0001 ** < 0.001 * < 0.01 † < 0.05.

MY: milk yield; FY: fat yield; PY: protein yield; FC: fat content; PC: protein content, RZR: fertility index, summarizing all following traits, FLc and FLh: 1st to successful insemination separated after cows and heifers, NRc and NRh: non-return rate for cows and heifers, CON: conception (summarizing FLC and FLH, NRC and NRH), CFc: calving to first insemination; DO: and days open.

60 – averaged over first 60 lactation days; 305 – 305-day records.

Strucken et al.

Strucken et al. BMC Genetics 2012 13:108   doi:10.1186/1471-2156-13-108

Open Data