Genotype-Environment (G X E) Interaction for Body Weights for Kuchi Chicken Ecotype of Tanzania Reared Under Intensive and Extensive Management

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Dr. J. Lwelamira
Dr. J. Lwelamira
1 Institute of Rural Development Planning, Dodoma, Tanzania.

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Genotype-Environment (G X E) Interaction for Body Weights for Kuchi Chicken Ecotype of Tanzania Reared Under Intensive and Extensive Management Banner
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This study was carried out with the aim of determining magnitude of G x E interaction for body weights for Kuchi chicken ecotype of Tanzania reared under intensive (on-station) and extensive (freerange) management systems. Body weight was assessed at 8 (Bwt8), 12(Bwt12), 16(Bwt16), and 20(Bwt20) weeks of age. Results for this study indicated average performance in all body weight measurements was significantly higher under intensive management compared to extensive management (P< 0.001), signifying two diverse environment and hence possibility for G x E interaction. Based on magnitude of genetic correlation for the same trait measured in two environments ( rg ) G x E interaction for all body weight measurements were found to be substantial (i.e. biologically important). Value for rg was 0.745, 0.757, 0.752 and 0.753 for Bwt8, Bwt12, Bwt16 and Bwt20, respectively. Since breeding program for improving performance of the ecotype would be more feasible under intensive management and hence more likely to take place under such environment, based on results of this study, if such breeding program is to be implemented, sensitization of smallholder farmers (beneficiaries of the breeding program) to shift from their current system of management (extensive management) to at least semiintensive system of management is recommended for minimizing the effect of G x E interaction.

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No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Not applicable for this article.

Dr. J. Lwelamira. 1970. \u201cGenotype-Environment (G X E) Interaction for Body Weights for Kuchi Chicken Ecotype of Tanzania Reared Under Intensive and Extensive Management\u201d. Unknown Journal GJMR Volume 12 (GJMR Volume 12 Issue 5): .

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This study was carried out with the aim of determining magnitude of G x E interaction for body weights for Kuchi chicken ecotype of Tanzania reared under intensive (on-station) and extensive (freerange) management systems. Body weight was assessed at 8 (Bwt8), 12(Bwt12), 16(Bwt16), and 20(Bwt20) weeks of age. Results for this study indicated average performance in all body weight measurements was significantly higher under intensive management compared to extensive management (P< 0.001), signifying two diverse environment and hence possibility for G x E interaction. Based on magnitude of genetic correlation for the same trait measured in two environments ( rg ) G x E interaction for all body weight measurements were found to be substantial (i.e. biologically important). Value for rg was 0.745, 0.757, 0.752 and 0.753 for Bwt8, Bwt12, Bwt16 and Bwt20, respectively. Since breeding program for improving performance of the ecotype would be more feasible under intensive management and hence more likely to take place under such environment, based on results of this study, if such breeding program is to be implemented, sensitization of smallholder farmers (beneficiaries of the breeding program) to shift from their current system of management (extensive management) to at least semiintensive system of management is recommended for minimizing the effect of G x E interaction.

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Genotype-Environment (G X E) Interaction for Body Weights for Kuchi Chicken Ecotype of Tanzania Reared Under Intensive and Extensive Management

Dr. J. Lwelamira
Dr. J. Lwelamira Institute of Rural Development Planning, Dodoma, Tanzania.

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