الفهرس | Only 14 pages are availabe for public view |
Abstract Life-time performance of the ewe is the ultimate indicator of her utility in the flock since it takes account of the stayability of the ewe in the flock and possible trade-offs between performances in consecutive seasons. Life-time performance is also important in investigating flock economics. Very few studies have been made to estimate life-time performance of the ewe and factors affecting it in Egyptian breeds of sheep. This investigation was carried out to estimate life-time lamb and ~mol production of e\~es from Ossimi and Rahmani breeds, genetic and environmental factors influncing it and its genetic and phenotypic relationship vlith the ewe weight early in her life as well as her mature WIteight. |