Fertility

Fertility

Fertility is seen as the major problem on bigger dairies.

Heat detection and conception rates are causing more and more problems. Expensive management tools:  heat detection systems, synchronisation, exta fertile semen, are all helpfull instruments. But they do not solve the problem of poor fertility caused by inbreeding. Selection within pure breeding models will not solve these problems. All over the world Holstein selection schemes have been trying for over a decade to stop the negative trend. Very few have reach improvement.

ProCROSS cows show much better fertility.

Results found in the California, USA

Table 1. Results for the interval in days between calving and pregnancy are listed

  Holsteins G1:  MON x HF G1: VR x HF
Interval days 148 122 136

 

Table 2. Number of days per breed of first breeding after calving in different lactations

  Holsteins G1: MON x HF G1: VR x HF
1st lact. 72 67 (-5) 69 (-3)
2nd lact. 69 63 (-6) 65 (-4)
3rd lact. 70 62 (-8) 66 (-4)
4th lact. 67 60 (-7) 64 (-4)
5th lact. 71 63 (-8) 67 (-4)

 

Table 3. First service conception rates

  Holsteins G1: MON x HF G1: VR x HF
1st lact. 25 27 (+2) 24 (-1)
2nd lact. 21 32 (+11) 28 (+7)
3rd lact. 24 27 (+3) 28 (+4)
4th lact. 27 35 (+8) 22 (-5)
5th lact. 17 43 (+26) 41 (+24)

 

Table 4. Days open

  Holsteins G1: MON x HF G1: VR x HF
1st lact. 148 132 (-16) 134 (-14)
2nd lact. 144 120 (-24) 133 (-11)
3rd lact. 146 130 (-16) 132 (-14)
4th lact. 147 120 (-27) 146 (-1)
5th lact. 157 111 ( -48) 138 (-19)

 

Results in Holland.

In Holland breeding values of popular dairybreeds are published by GES. Since all red dairybreeds are published on the Red Holstein genetic basis it is very easy to compare genetic levels of populations. For daughter fertility the following breeding values were published in August 2013. You have to realise yourselves that these breeding values have been corrected for the positive effects of heterosis. Result mesured on cow level are therfore even better.

Table 5. Daughter fertility

  Holsteins Montbéliarde VikingRed
BV Daughter Fertility 100 +104 +105