Sustainable Community-Based Organizations for the Genetic Improvement of Livestock in Developing Countries

Kahi, A.K.; Rewe, T. O.; Kosgey, I.S.

doi:10.5367/000000005775454706

Cited by 46 publications

(52 citation statements)

References 6 publications

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“…Previous studies have analysed and recommended this approach due to its relative low organisational costs and operational demands (Sölkner et al 1998;Kahi et al 2005).…”

Section: Identification and Performance Recording Systemsmentioning

confidence: 99%

Analysis of production objectives and breeding practices of dairy goats in Kenya

Bett

Kosgey

Kahi

et al. 2008

Trop Anim Health Prod

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Production objectives and breeding practices of smallholder households participating in dairy goat breeding projects were analysed in relation to their ability to bring about sustainable genetic improvement in the dairy goat flocks in Kenya. A stratified survey involving 311 goat keepers in 4 project sites was used. This employed both qualitative and quantitative research methods to get a holistic view of dairy goats, and take into account the full array of contributions of dairy goats to the smallholder households. Milk production and sales of breeding stock were high priority functions for the objective to create a financial buffer. The breeding objective traits that farmers perceived as being of primary importance were milk yield, growth rate, body size, fertility and disease tolerance. There were logical trade-offs in the choice of these traits by farmers. Female dairy goats were mainly culled due to old age, poor fertility, small body size and poor health. Farmers did not place a large significance on unsatisfactory milk performance when culling female goats, mainly due to the very small production size and the high demand existing for breeding animals. Factors affecting milk yield and flock size presented satisfied a P<0.1 significance level. The performance levels of dairy goats were mainly influenced by breeding strategies and the resource availability at the farm level. The optimisation of genotype x environment interactions remains the biggest challenge given the objectives set by the farmer.

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“…Previous studies have analysed and recommended this approach due to its relative low organisational costs and operational demands (Sölkner et al 1998;Kahi et al 2005).…”

Section: Identification and Performance Recording Systemsmentioning

confidence: 99%

Analysis of production objectives and breeding practices of dairy goats in Kenya

Bett

Kosgey

Kahi

et al. 2008

Trop Anim Health Prod

View full text Add to dashboard Cite

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“…Lack of such knowledge leads to the setting up of unrealistic breeding goals and the consequence of which can put in danger the conservation of indigenous animal genetic resources (Zewdu et al ., 2006 (Mbuku et al, 2006). Currently, community based genetic improvement strategies are being advocated for pastoral production (Kahi et al, 2005). These strategies would require a good understanding of the community's indigenous knowledge of their animals.…”

Section: Introductionmentioning

confidence: 99%

Breeding objectives, selection criteria and breeding system of indigenous goat types in bale zone, oromia, Ethiopia

Asefa

Kebede

Effa

2016

Int. J. Agril. Res. Innov. & Tech.

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The study was undertaken in bale zone to assess farmer's selective breeding objectives, trait preferences, selection criteria and breeding system October 2012 to November 2013. A purposive and multistage sampling technique was applied for selection of 3 district and 9 kebeles. Then 360 households were selected by using simple random sampling techniques after the list of pastoralist having goats was identified. Statistical analysis system version 9.1 was used for analysis of data. Indices, effective population size and rate of inbreeding were calculated on average each respondent holds about 14 goats. Milk production is the main reason of goat keeping in the study area. Appearance is the first rank as selection criteria for male and female in all studies area. About 47.8% of the respondents have their own buck. The main use of breeding buck in the study area was for mating purpose (76.2%). Mean estimate of effective population size and mean rate of inbreeding was 2.43 and 0.21, respectively when a household flock is herded alone and under random mating. Therefore, any breed improvement strategies that are intended to be implemented in the study area and else-where should consider the traditional breeding practices and breeding objectives of the community.

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“…Each one with a very small effect on phenotypical expression of the traits (2,3). Although the BLUP method has been widely used for genetic progress of domestic species, its main limitation is the strict dependency on productive records to obtain high reliability in genetic evaluations (4).…”

Section: Introductionmentioning

confidence: 99%

Estimation and comparison of conventional and genomic breeding values in Holstein cattle of Antioquia, Colombia

et al. 2015

Rev MVZ Córdoba

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Objetive. To estimate and compare breeding values (EBV) using the conventional method (BLUP) and genomic breeding values (MEBV and GEBV) estimated through bayes C method for milk yield and milk quality traits in dairy cattle in Antioquia, Colombia. Materials and methods. Two methods were used to estimate breeding values: BLUP to estimate conventional breeding value (EBV) and bayes C to estimate genomic values (MEBV and GEBV). The traits evaluated were: milk yield (PL), protein percentage (PPRO), fat percentage (PGRA) and score somatic cell (SCS). The methods (BLUP and bayes C) were compared using Person correlation (r p ), Spearman rank correlation (r s ) and linear regression coefficient (b). Results. The Pearson and Spearman correlations among EBVs and genomic values (MEBV and GEBV) (r pMEBV;EBV and r sGEBV;EBV ) were greater than 0.93 and the linear regression coefficients of EBVs on genomic values (MEBV and GEBV) (b MEBV;EBV , and b GEBV;EBV ) ranged between 0.954 and 1.051 in all traits evaluated. Conclusions. The predictions of genomic values (MEBV and GEBV), using bayes C method were consistent with the predictions of the EBVs estimate through the conventional method (BLUP) in conditions of high Colombian tropic, allowing to obtain high associations between the breeding values.

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Sustainable Community-Based Organizations for the Genetic Improvement of Livestock in Developing Countries

Cited by 46 publications

References 6 publications

Analysis of production objectives and breeding practices of dairy goats in Kenya

Analysis of production objectives and breeding practices of dairy goats in Kenya

Breeding objectives, selection criteria and breeding system of indigenous goat types in bale zone, oromia, Ethiopia

Estimation and comparison of conventional and genomic breeding values in Holstein cattle of Antioquia, Colombia

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