Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/19794
Title: A novel use of high density SNP assays to optimize choice of different crossbred dairy cattle genotypes in small-holder systems in East Africa
Contributor(s): Ojango, J M K (author); Marete, A (author); Mujibi, D (author); Rao, J (author); Poole, J (author); Rege, J E O (author); Gondro, C  (author)orcid ; Weerasinghe, S M S P (author); Gibson, J P  (author)orcid ; Okeyo, A M (author)
Publication Date: 2014
Handle Link: https://hdl.handle.net/1959.11/19794
Abstract: We present use of SNP technologies to obtain for the first time, rapid, large-scale, in situestimates of performance of crossbred cows in smallholder herds. Compared to historical approaches, our approach allowed optimum crossbreed choices to be determined more rapidly and without question about the relevance of the environment. High-density SNP assays were used to estimate breed composition for a monitored population comprising 1292 cows from 610 smallholder farms in Kenya. The achieved milk yields are much lower than generally assumed and lactation curves are very flat out to 400 days. In poor production environments, lower grade crosses (containing <60% exotic dairy alleles) had the same yield as high grade crosses. Allowing for the larger size and maintenance requirements of high grade exotics, lower grade exotics will be the most economically productive animals in these environments.
Publication Type: Conference Publication
Conference Details: WCGALP 2014: 10th World Congress on Genetics Applied to Livestock Production, Vancouver, Canada, 17th - 22nd August, 2014
Source of Publication: Proceedings of the 10th World Congress on Genetics Applied to Livestock Production (WCGALP) (Genetic Improvement Programs: Selection using molecular information (Posters)), p. 1-3
Publisher: American Society of Animal Science
Place of Publication: Champaign, United States of America
Fields of Research (FoR) 2008: 070201 Animal Breeding
Fields of Research (FoR) 2020: 300305 Animal reproduction and breeding
Socio-Economic Objective (SEO) 2008: 830302 Dairy Cattle
Socio-Economic Objective (SEO) 2020: 100402 Dairy cattle
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Publisher/associated links: https://asas.org/docs/default-source/wcgalp-posters/486_paper_9248_manuscript_560_0.pdf
Appears in Collections:Conference Publication

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