Abstract
SUMMARY Crossbreeding is the mating system aimed at improving the desirable traits through mating of individuals with different genetic backgrounds to produce offsprings which performs better than their parents. Additionally, this mating system represents one of the traditional ways of improving both egg production and quality. However, the best chicken breeds suitable for crossbreeding for improvement of egg production traits in the poultry industry are not fully explored. In this review, the origin of exotic and indigenous chickens used for crossbreeding are documented. Furthermore, the egg production performance and crossbreeding parameters such as heterosis, specific combining ability, general combining ability, reciprocal and maternal heterosis in indigenous, exotic and crossbreds are reported. This review emphasises the significance of crossbreeding exotic and indigenous chickens for improved egg production traits. In addition, it highlights the great potential for genetic improvement of indigenous chickens through crossbreeding.
Published Version
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