EFFECT OF SELECTION FOR HIGH LIVE BODY WEIGHT ON SLAUGHTER PERFORMANCE OF BROILER BREEDERS | ||||
| Egyptian Poultry Science Journal | ||||
| Article 15, Volume 34, Issue 1, March 2014, Page 289-304 PDF (552.07 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/epsj.2014.5317 | ||||
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| Abstract | ||||
| The performance of the Cairo B-2 line was evaluated after eight generations of selection for increasing six week live body weight (LBW) compared with a Random Bred Control (RBC) line. Three thousand chicks, from the ninth generation, from both lines were raised in the same house until 6 weeks of age. Water and feed were provided ad libitum. Light was provided 24 hours per day. LBW at 0, 2, 4, and 6 weeks of age were determined for the Cairo B-2 and RBC lines. At 6 week of age 30 males and 30 females from each line were slaughtered to determined carcass characteristics. Our results indicated that, Cairo B-2 line weighed 35% more than the RBC in the ninth generation. The difference in LBW between the Cairo B-2 and RBC lines was 396 g at 6 weeks of age. In addition, the Cairo B-2 line had significantly higher carcass, breast meat, leg meat, abdominal fat weight and percentages than the RBC line. However, the RBC line had significantly higher wings with bones percentages than the Cairo B-2 line. Also, Cairo B-2 line had significantly longer shanks and keels than the RBC line. On the other hand, the RBC line had significantly higher edible giblets percentages than Cairo the B-2 line. It was concluded that, selection for increasing 6-week LBW, in chicken, caused concurrent increases in carcass parts percentages and decreases in edible giblets percentages. Also, continuous selection for increasing 6-week LBW, in Cairo B-2 line, caused improvement in its performance from one generation to the next. | ||||
| Keywords | ||||
| Broiler Breeder; body weight; selection; Carcass parts; Abdominal fat | ||||
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