CROSSBREEDING EFFECTS OF PROGENY TRAITS DUE TO CROSSING OF BAUSCAT AND BALADI RED RABBITS | ||||
| Journal of Animal and Poultry Production | ||||
| Article 3, Volume 31, Issue 12, December 2006, Page 7549-7559 PDF (120.67 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2006.235669 | ||||
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| Author | ||||
| G. E.Y. Attalah, | ||||
| Department of Animal Production, Faculty of Agriculture, AIAzhar University1 Nasr City, Egypt | ||||
| Abstract | ||||
| A crossbreeding study was carried out at the Experimental Rabbit Farm, Department of Animal Production, Faculty of Agriculture, At-Azhar University, Nasr City Cairo, Egypt, for three consecutive years of production starting from September 1998, using Bauscat (exotic breed) and Baladí Red (local breed) ¡n addition to their two reciprocal crosses to study direct heterosis, maternal additive and diret additive effects on progeny traits (body weight and daily gain). Breed group effects on body weight were non-significant at different stage of ages, while its effects on daily gain weight were found to be significant at age intervals of (8-10), (10-12), (12-14) and (4- 14) weeks of age. Threr was a superiority of Bauscat rabbits over Baladi Red for body weight at studied all age except at 10 weeks, while for daily gain weight ¡t was during all age intervals except at (5-10) weeks. however the differences between the two breeds were mostly non-significant for body weight and daily gain traits. Crossbreeding between Bauscat and Baladi Red rabbits was generally associated with improvement in all body weights and daily gain weight traits except body weights at 12, 14 weeks and daily gain during ages intervals of (8-10), (10-12) and (4 —14) weeks. Direct Sire additive effect on progeny traits were mostly ¡n favour of Bauscat sired rabbits progeny traits except body weight at 14 weeks and during the age interials of (8-10), (10-12), (12-14), (birth-14) and (4-14) weeks it was in favour of Baladi Red sires. Maternal additive effect on progeny traits was in favour of Baladí Red rabbits for most studied body weight traits. When crossbreeding was applied between these two rabbit breeðs Maternal additive effect on daily gain was ¡n favour of BR dams during the age intervals of (birth-4), (4-6) and (6-8), while daily gain during intervals of (8-10), (10-12), (12-14), (birth-14) and (4-14) weeks were in favour of B dams. Keywords: Egyptian Balad Red rabbits, crossbreeding, Heterotic effect, maternal additive effect, direct additive effect. INTRODUCTION Crossbreeding has an advantage over the synthesis of breeds ¡n utilizing the breed differences due to the expected segregation along with the recombination (Dickerson, 1969). Egyptian studies (e.g. Afifi, 1971; Afifi and Khalil, 1989; Oudha, 1990; ElDessokì, 1991; Afifi et aL, 1994; Khalil et at, 1995 and Abd El-Aziz, 1998) evidenced, ¡ri general, that crossing local breeds of rabbits (e.g. Baladi, Baladi Red, Baladi Black, Giza White, ..etc.) with exotic breeds (e.g. Bauscat, Californian, New Zealand White, ... etc.) was associated with improvement in progeny traits ( e.g. body weight and daily gain weight). Several studies were carried out to investigate the productive potentialities of native and exotic breeds of rabbits under the Egyptian conditions, in spit of this results there is a need to obtain more information about the genetic, environmental and managerial aspects of rabbit production to create a profitable industry. In addition to estimate the present objectives direct heterosis (H’), direct(G5 and maternal (G’) additive | ||||
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