Raphael Mrode
Principal Scientist - Quantitative Geneticist in Dairy, Livestock Genetics
International Livestock Research Institute
https://www.ilri.org/research/projects/african-dairy-genetic-gains
https://www.sciencedirect.com/science/article/pii/S1871141320300536
https://academic.oup.com/af/article/10/2/6/5814661?guestAccessKey=a09ee9c0-d378-4cf8-b341-175ab9ba5729
https://www.journalofdairyscience.org/article/S0022-0302(18)30701-X/abstract
https://livestock.cgiar.org/news/future-agricultural-extension-africa-digital
Genetic improvement in livestock is cumulative and permanent. However, genetic improvement occurs when the genetic merit of animals can be computed and those with superior genetic merit values selected as parents of the next generation. In smallholder dairy systems in East Africa, the lack of a systematic procedure to capture performance data and pedigree information to infer relationships among dairy animals has made it impossible to compute the genetic merits of animals and hence commence genetic improvement. This has resulted in the importation of foreign dairy bulls not adapted to the local tropical conditions for breeding and farmers blindly selecting animals/semen for breeding without any knowledge of their genetic merit and their suitability to the local production environment. This has resulted in the use of unsuitable foreign bulls, a merry go round in performance and productivity, and no defined direction in terms of genetic improvement in small holder dairy farming in East Africa.
In 2016, ILRI initiated the African Dairy Genetic Gains (ADGG) project implementing a digital innovative approach to capture performance data in Tanzania and Ethiopia in smallholder dairy systems. In addition, hair samples of the animals were collected to determine their genetic makeup. Combining the performance data for milk yield and body weight and the genomic information derived from the hair samples, ILRI has now developed a pipeline for the genomic prediction of the genetic merits /superiority of bulls and cows in Tanzania and Ethiopia. The top bulls and cows with the best breeding values adapted to the local tropical conditions, can now be identified, and selected as parents of the next generation of animals thus commencing the process of genetic improvement. In addition, genomic tool that will help assess the suitability of imported foreign dairy bulls is being tested.
In 2019, the first set of dairy bulls and cows ever selected based on their genetic merit from the pipeline developed by ILRI was put on display during the annual agricultural show in Tanzania. Some of the top bulls were purchased by ILRI and donated to the national artificial insemination (AI) station in Tanzania to make the semen available to smallholder farmers. A similar agricultural show of genetically superior bulls and cows is being planned for Ethiopia in 2020.
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