The use of performance test parameters for selection of gilts before their placement into breeding
2006
Kernerova, N.(Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Specialni Zootechniky) E-mail:[email protected] | Vaclavovsky, J.(Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Specialni Zootechniky) | Matousek, V.(Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Specialni Zootechniky) | Hanykova, Z.(Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Specialni Zootechniky)
The aims of the study were to evaluate carcass value in reared gilts on the basis of carcass analysis during the station test of purebred progeny and ultrasonically with Sonomark-100 or Piglog-105 instruments, and to verify the possibility to predict backfat thickness and/or average daily weight gains as well as the lean meat content in gilts. In total 54 Czech Large White gilts of dam and sire lines were evaluated. Four-parameter Richards function was used for growth evaluation. The regression function y = 63.870-0.447 bt1 - 0.510 bt2 + 0.128 MLLT was applied for the calculation of lean meat content. Relations between average backfat thickness, average weight gain from birth and lean meat content on one hand and body weight on the other hand were expressed as linear regressions. In both lines, the backfat thickness and weight gains increased with increasing body weight, whereas lean meat content decreased.
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