| Autor: |
HM Burrow, B Gulbransen, SK Johnson, GP Davis, WR Shorthose, RF Elliott |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Australian Journal of Agricultural Research. 42:1373 |
| ISSN: |
0004-9409 |
| DOI: |
10.1071/ar9911373 |
| Popis: |
Thirty-five steers and 37 heifers were grown at pasture and finished in a feedlot to meet Australian domestic market specifications, i.e. 160-200 kg carcass weight with 5-9 mm subcutaneous fat at the P8 rump site. The animals were from lines that had been selected for either high growth rate to 600 days (UPWT) or for low rectal temperature under conditions of high ambient temperatures (TEMP) and from a control line (CONT). They were slaughtered in six groups at fortnightly intervals when liveweight of individuals was estimated to satisfy market requirements. Animals from the UPWT line were heavier at all ages than animals from the TEMP and CONT lines (P< 0.05) and had higher liveweight gains at pasture (P < 0.01). There was no difference between the lines in liveweight gains in the feedlot. At the same carcass weight, UPM animals had leaner carcasses (P < 0.01) but similar levels of marbling to CONT line animals. TEMP line animals were also leaner than CONT line animals (P < 0.0l ) , but had more marbling (P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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