Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/23190
Title: | Optimal and practical strategies to manage an ovulation rate mutation located on the X chromosome in a French sheep breed | Contributor(s): | Raoul, Jerome (author); Bodin, L (author); Elsen, Jean-Michel (author); Swan, Andrew (author) | Publication Date: | 2017 | Open Access: | Yes | Handle Link: | https://hdl.handle.net/1959.11/23190 | Open Access Link: | http://www.aaabg.org/aaabghome/fullproc22.php | Abstract: | In French sheep breeding programs, several mutations affecting ovulation rate have been discovered. For mutations located on the X chromosome, the optimal management of such genes is still a challenge because nucleus flocks are small compared to Australian or New Zealand ram breeding flocks. A deterministic model was developed, and using sequential quadratic programming methodology, the combination of mating types that maximized the profit across a range of genotype costs was determined. Results show that even if losses of genetic gain were quite high compared to the gain without the major gene, the optimal use of an ovulation rate mutation located on the X chromosome was beneficial. At the current costs, the optimal strategy that gave the maximal profit was based on four different mating types. A strategy based on only the use of carrier females mated to non-carrier males gave similar results to the optimal strategy in terms of profit and genetic gain. This strategy could be adopted by French breeding programs where this kind of mutation segregates. | Publication Type: | Conference Publication | Conference Details: | AAABG 2017: 22nd Conference of the Association for the Advancement of Animal Breeding and Genetics, Townsville, Australia, 2nd - 5th July, 2017 | Source of Publication: | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.22, p. 49-52 | Publisher: | Association for the Advancement of Animal Breeding and Genetics (AAABG) | Place of Publication: | Armidale, Australia | ISSN: | 1328-3227 | Fields of Research (FoR) 2008: | 070201 Animal Breeding | Fields of Research (FoR) 2020: | 300305 Animal reproduction and breeding | Socio-Economic Objective (SEO) 2008: | 830310 Sheep - Meat 830311 Sheep - Wool |
Socio-Economic Objective (SEO) 2020: | 100412 Sheep for meat 100413 Sheep for wool |
Peer Reviewed: | Yes | HERDC Category Description: | E1 Refereed Scholarly Conference Publication | Publisher/associated links: | http://www.aaabg.org/aaabghome/ |
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Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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