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| Titel: |
Performance Testing of Pigs for Lean Tissue Growth Rate in a Selection Experiment with Low and High Protein Diets: II. Correlated Responses of Lean Percentage and Growth Rate |
| Auteur: |
Stern, Susanne Johansson, Kjell Rydhmer, Lotta Andersson, Kjell |
| Verschenen in: |
Acta agriculturae Scandinavica. Section A, Animal science |
| Paginering: | Jaargang 44 (1994) nr. 1 pagina's 1-7 |
| Jaar: |
1994-02-01 |
| Inhoud: |
In a selection experiment, halothane gene-free Swedish Yorkshire pigs were performance tested for improved lean tissue growth rate (LTGR) on a high protein [HP, 18.5% crude protein (CP)] or a low protein (LP, 13.1% CP) diet. LTGR was determined based on ultrasonic measurements and repeated weighings. In total, 2885 pigs were tested in generation zero and four selected generations. Genetic parameters were estimated with REML using a multiple trait animal model. Heritabilities for growth rate and lean percentage were 0.37 and 0.49 in the LP-line and 0.31 and 0.46 in the HP-line. The genetic correlation between growth rate and lean percentage was favourable (0.25) in the HP-line but unfavourable (-0.67) in the LP-line. As a result, lean percentage in the LP-line decreased during the course of selection. Growth rate increased in both lines, since it was highly correlated (0.96) with LTGR. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 10 gevonden artikelen
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