Deterministic simulations to determine the impacts of economic and non-economic breeding objectives on sustainable intensification of developing smallholder dairy farms
| العنوان: | Deterministic simulations to determine the impacts of economic and non-economic breeding objectives on sustainable intensification of developing smallholder dairy farms |
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| المؤلفون: | Hans Komen, J.A.M. van Arendonk, C.M. Kariuki, Alexander K. Kahi |
| المصدر: | Livestock Science, 226, 7-12 Livestock Science 226 (2019) |
| بيانات النشر: | Elsevier BV, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0301 basic medicine, Breeding program, Developing dairy cattle systems, Yield (finance), Developing country, Animal Breeding and Genomics, 03 medical and health sciences, Agricultural science, Non-market weights, Economics, Production (economics), Fokkerij en Genomica, Market value, Productivity, General Veterinary, business.industry, 0402 animal and dairy science, 04 agricultural and veterinary sciences, 040201 dairy & animal science, 030104 developmental biology, Sustainability, Agriculture, WIAS, Animal Science and Zoology, Breeding objectives, business |
| الوصف: | Dairy cattle farming in developing countries is mainly by resource poor smallholder farmers. Intensification of production within smallholder production systems is being driven by increasing demand for animal products. Current intensification is driven by importation of high-input high-output genotypes. This puts in question the sustainability of these resource constrained systems under harsh environmental conditions. Sustainability of production systems can be defined as long-term resilience and productivity. We use deterministic simulations to compare the impacts of three criteria to define breeding objectives i.e., economic, desired gains and non-market value, on annual genetic and monetary gains in production (market) and functional (non-market) traits for a small-sized nucleus genomic selection breeding program under developing country conditions. Market traits considered were milk yield (MY) and mature body weight (MBW). Non-market traits were calving interval (CI) and production lifetime (PLT). Fat yield (FY) was also considered a non-market trait as it had no market value. With the economic objective, traits were weighted on economic values. Weights for desired gains and non-market (NM) values were derived iteratively. Economic objectives placed highest emphasis on MY with very little gains in non-market traits but had the highest returns on investment. For desired gains objective, maximal achievable gains in PLT, CI and FY were lower than the indicated desired gains. The non-market value objective achieved the best compromise between gains in MY and other traits. We conclude that non-market value objectives can be applied to direct selection towards more robust genotypes but with loss in monetary gain. Breeding robust genotypes can contribute to sustainable intensification in developing small-holder dairy systems. However, for such objectives to be satisfactory, a sound criterion is required to determine declines in genetic gains for market traits that are acceptable by producers. |
| وصف الملف: | application/octet-stream; application/pdf |
| تدمد: | 1871-1413 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5730d1c39d9b84138166c720df79bdf6Test https://doi.org/10.1016/j.livsci.2019.05.019Test |
| حقوق: | RESTRICTED |
| رقم الانضمام: | edsair.doi.dedup.....5730d1c39d9b84138166c720df79bdf6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18711413 |
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