Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/51599
Title: Proposed genetic improvement strategies for dairy cattle in Kenya
Contributor(s): Wahinya, P K  (author)orcid ; Swan, A A  (author)orcid ; Jeyaruban, M G  (author)orcid 
Publication Date: 2021
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/51599
Open Access Link: http://www.aaabg.org/aaabghome/proceedings24.phpOpen Access Link
Abstract: 

Genotype by environment interactions and heterogeneity of variance may influence the effectiveness of breeding programs in developing countries. This study investigated optimization of dairy cattle breeding programs within Kenya for low, medium and high input and output production systems in the presence of genotype by environment interactions. Multi-trait selection index theory was applied using the SelAction software package to determine the optimum strategy that would maximise genetic gain across the three production systems. The breeding goal was to maximise overall gain for a breeding objective containing three traits: lactation milk yield; lactation fat yield and calving interval. Three selection strategies based on: 1) sire evaluation and selection within the high production systems only (single); 2) independent sire evaluation and selection within each production system (independent) and 3) sire evaluation across all production systems (joint), were evaluated under scenarios using progeny test information and genomic information. The joint strategy maximised the overall economic gain (1583 Kes) while the single strategy generated the least overall gain (1311 Kes). The dairy industry in Kenya would therefore benefit from implementing production system specific breeding strategies for bull evaluation and selection. In addition, implementing genomic selection could speed up the rate of genetic gain compared to progeny testing due to reductions in generation interval and higher selection accuracy with a moderately large reference population.

Publication Type: Conference Publication
Conference Details: AAABG 2021: 24th Conference of the Association for the Advancement of Animal Breeding and Genetics, Online Event, 2nd - 4th November, 1997
Source of Publication: Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.24, p. 414-418
Publisher: Association for the Advancement of Animal Breeding and Genetics (AAABG)
Place of Publication: Armidale, Australia
ISSN: 1328-3227
Fields of Research (FoR) 2020: 300301 Animal growth and development
Socio-Economic Objective (SEO) 2020: 100402 Dairy cattle
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Publisher/associated links: http://www.aaabg.org/aaabghome/
Description: Paper presented by Peter Wahinya
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication

Files in This Item:
3 files
File Description SizeFormat 
Show full item record

Page view(s)

1,026
checked on Mar 9, 2023

Download(s)

2
checked on Mar 9, 2023
Google Media

Google ScholarTM

Check


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.