Participatory definition of breeding objectives and selection indexes for sheep breeding in traditional systems

Gizaw, Solomon; Komen, Hans; Arendonk, J.A.M. van

doi:10.1016/j.livsci.2009.10.016

Cited by 54 publications

(47 citation statements)

References 32 publications

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“…The same results were observed in different areas in Ethiopia (Gizaw et al, 2010;Melaku et al, 2012). The objectives behind these selection criteria were primarily to improve weight and growth.…”

Section: Reproduction and Animal Genetic Resourcessupporting

confidence: 66%

Systèmes d’élevage ovin et gestion des ressources génétiques animales dans la région du Plateau central du Burkina Faso

Tindano

Moula

Traoré

et al. 2017

Rev. Elev. Med. Vet. Pays Trop.

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A l’image de l’ensemble de la filière de l’élevage dans les pays en développement, l’élevage ovin au Burkina Faso fait face à une demande croissante, dans un contexte de production socioéconomique et environnemental contraignant. Cela a donné lieu à des croisements peu maîtrisés dans la zone périurbaine de la capitale, Ouagadougou. Afin d’identifier les moyens d’encadrer ces pratiques pour rendre durables les systèmes ovins, une enquête a été conduite auprès de 63 éleveurs évoluant dans le milieu rural de la région du Plateau Central. L’objectif principal était d’évaluer les possibilités d’une gestion intégrée entre les éleveurs ruraux et les éleveurs périurbains à travers notamment des échanges de femelles. Les données ont été collectées à travers des entretiens directs à l’aide d’un questionnaire comportant des questions ouvertes et fermées. Les résultats ont montré que l’ensemble des éleveurs avaient des stratégies de sélection à travers le choix des mâles reproducteurs. Ce choix se faisait essentiellement dans leur propre troupeau (98 % des interviewés) et quelquefois dans les marchés (22 %). Les objectifs principaux d’amélioration concernaient le poids adulte et la croissance des jeunes, ou le maintien de la rusticité. La brebis Djallonké, variété Mossi, était la race la plus rencontrée dans la zone (présente dans 97% des troupeaux). Mettant en œuvre leurs objectifs les éleveurs croisaient leurs brebis Mossi avec des béliers Peuhls, d’un plus grand gabarit, mais de manière temporaire afin de limiter la perte de résistance de leur troupeau. Le lien potentiel avec la production des éleveurs périurbains par la vente de femelles semblait faire face à des contraintes culturelles. Le système de production décrit par les éleveurs présentait des contraintes de durabilité et ne permettait pas de véritable intégration avec le système périurbain. Des approches participatives devraient être mises en œuvre localement afin d’élaborer des solutions appropriées pour accroître la production et la gestion durable des ressources zoogénétiques.

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Section: Reproduction and Animal Genetic Resourcessupporting

confidence: 66%

Systèmes d’élevage ovin et gestion des ressources génétiques animales dans la région du Plateau central du Burkina Faso

Tindano

Moula

Traoré

et al. 2017

Rev. Elev. Med. Vet. Pays Trop.

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“…Gizaw, Getachew, Tibbo, Haile and Dessie studies (Ndumu et al, 2008;Duguma et al, 2010;Gizaw et al, 2010) revealed that appearance/conformation traits are important criteria of selection under traditional livestock breeding practices. Among Menz sheep farmers, the presence of a horn, white and brown coat color and large fat tail confers high value on animals.…”

Section: Discussionmentioning

confidence: 99%

“…This requires that farmers' preferences be known a priori through surveys. For instance, Menz farmers' preferences are already well established (Getachew, 2008;Gizaw et al, 2010). Alternatively, farmers can be directly involved in the selection process in the nucleus flock in which they select candidate rams based on their criteria followed by selection on EBV among the pre-selected rams.…”

Section: Discussionmentioning

confidence: 99%

Congruence between selection on breeding values and farmers’ selection criteria in sheep breeding under conventional nucleus breeding schemes

Gizaw

Getachew

Tibbo

et al. 2011

Animal

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Designing breeding schemes suitable for smallholder livestock production systems in developing regions has hitherto been a challenge. The suggested schemes either do not address farmers' breeding goals (centralized station-based nucleus schemes) or yield slow genetic progress (village-based schemes). A new breeding scheme that integrates the merits of previously suggested schemes has been designed for Menz sheep improvement in Ethiopia. It involves selection based on breeding values in nucleus flocks to produce elite rams, a one-time only provision of improved rams to villagers and a follow-up village-based selection to sustain genetic progress in village flocks. Here, we assessed whether conventional selection of breeding rams based on breeding values for production traits, which is the practice in station-based nucleus flocks, meets farmers' breeding objectives. We also elicited determinants of farmers' ram choice. Low but significant correlations were found between rankings of rams based on farmers' selection criteria, estimated breeding values (EBV) and body weight (BW). Appearance traits (such as color and horn) and meat production traits (BW and linear size traits) significantly determined farmers' breeding ram choice. The results imply that conventional selection criteria based solely on EBV for production traits do not address farmers' trait preferences fully, but only partially. Thus, a two-stage selection procedure involving selection on breeding values in nucleus centers followed by farmers' selection among top-ranking candidate rams is recommended. This approach accommodates farmers' preferences and speeds up genetic progress in village-based selection. The Menz sheep scheme could be applied elsewhere with similar situations to transform conventional station-based nucleus breeding activities into participatory breeding programs.

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“…The best young rams were to be selected on the basis of their 6-month weight corrected for nongenetic factors. These criteria were further subjected to farmers' selection criteria, which have been defined earlier (Getachew et al, 2010;Gizaw et al, 2010). Farmers, however, put heavier weights on their own subjective morphometric type of criteria (i.e.…”

Section: Menz Sheep Breeding Programmentioning

confidence: 99%

Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system

Gizaw

Getachew

Goshme

et al. 2014

Animal

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We evaluated the efficiency of selection for body weight in a cooperative village breeding program for Menz sheep of Ethiopia under smallholder farming system. The design of the program involved organizing villagers in a cooperative breeding group to implement selective breeding of their sheep. The program was jump-started through a one-time provision of elite rams from a central nucleus flock, but subsequent replacement rams were selected from within the village flocks. We also evaluated body weight trends in a village where cooperative breeding was not implemented and individual farmers managed their flocks under traditional breeding practices. Under traditional breeding practices, genetic progress over 8 years either stagnated or declined in all the weights recorded. In the cooperative villages, selection differentials of 2.44 and 2.45 kg were achieved in 2010 and 2011 selection seasons, respectively. Birth weight, 3-month weight and 6-month weight increased, respectively, by 0.49, 2.29 and 2.46 kg in the third-generation lambs over the base generation. Improved rams supplied from the central nucleus flock gave an initial genetic lift of 14.4% in the 6-month weight. This was higher than the gain achieved from selection in the village flocks, which was 5.2%. Our results showed that village-based genetic improvement in body weights under smallholder conditions could be feasible if appropriate designs are adopted and that commencing with elite central nucleus rams help jump-start village-based programs.

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Participatory definition of breeding objectives and selection indexes for sheep breeding in traditional systems

Cited by 54 publications

References 32 publications

Systèmes d’élevage ovin et gestion des ressources génétiques animales dans la région du Plateau central du Burkina Faso

Systèmes d’élevage ovin et gestion des ressources génétiques animales dans la région du Plateau central du Burkina Faso

Congruence between selection on breeding values and farmers’ selection criteria in sheep breeding under conventional nucleus breeding schemes

Efficiency of selection for body weight in a cooperative village breeding program of Menz sheep under smallholder farming system

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