Analyse discriminante des ovins dans la région est de l’Algérie

Dekhili, M.

doi:10.21071/az.v63i244.511

Cited by 2 publications

(3 citation statements)

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“…The productivity performance recorded for the three generations studied were higher than those of OD purebred ewes reported by Triki (2003), with a productivity of 7.48, 6.68 and 10.72 kg over three breeding cycles, respectively, for ewes fed on untreated straw, ureatreated straw, and ammonia-treated straw, and kept in an integral sheepfold with heat synchronization. The productivity realized was superior to that recorded by Dekhili (2010;12.8 kg) for the OD breed managed under extensive grazing systems in the Sétif region.…”

Section: ■ Results and Discussionmentioning

confidence: 55%

“…Triki (2003) recorded average NP rates over three breeding cycles of 71, 58, 69 and 58% for ewes that were fed, respectively, ammoniatreated straw, urea-treated straw, alfalfa hay and oat hay, and were kept in an integral sheepfold with heat synchronization. Similarly, Dekhili (2010) reported a rate of 80% on extensively managed ewes.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

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Évaluation des performances reproductives et productives d’un croisement génétique alternatif entre deux races ovines locales, Ouled Djellal et D’man

Sebkhi,

Adaouri,

Triki

et al. 2024

Rev. Elev. Med. Vet. Pays Trop.

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L’objectif de cette étude était d’évaluer l’effet du croisement alternatif sur les performances reproductives et la productivité des ovins. Deux races ovines indigènes algériennes ont été utilisées : Ouled Djellal (OD), connue pour ses qualités exceptionnelles de production de viande, et D’man (D), connue pour ses qualités exceptionnelles de reproduction. Au total, 288 brebis (tous génotypes confondus) ont été utilisées, dont 130 brebis OD de race pure constituant le troupeau de base de la première génération (G1), 71 brebis croisées (50 % de sang OD et 50 % de sang D) de la deuxième génération (G2), et 87 brebis croisées (75 % de sang OD et 25 % de sang D) de la troisième génération (G3). L’effet bélier a été utilisé pour synchroniser les chaleurs en lutte naturelle en lot. Nos résultats montrent une amélioration de la fécondité (fertilité × prolificité) des brebis des première, deuxième et troisième générations par rapport à la valeur standard (95 %) des brebis de race pure OD (G1 : 97,69 ± 66,43 % ; G2 : 122,54 ± 53,98 % ; G3 : 114,94 ± 58,13 %). Il y a également eu une amélioration de la productivité numérique et pondérale au sevrage (90 jours) par rapport aux valeurs précédemment rapportées pour les brebis OD élevées en Algérie. Pour la productivité numérique, les valeurs étaient de 83,85 ± 62,01 % à G1, 121,13 ± 53,23 % à G2, et 100 ± 54,98 % à G3 (contre 73 % rapportés dans la littérature) ; pour la productivité pondérale, les valeurs étaient de 15,29 ± 9,41 kg à G1, 24,56 ± 9,01 kg à G2, et 17,15 ± 7,67 kg à G3 (contre 10,55 kg rapportés dans la littérature). En conclusion, la race D, qui présente un potentiel reproductif exceptionnel, pourrait être utilisée en croisement pour augmenter la productivité des systèmes d’élevage ovin fonctionnant dans les conditions locales dans les zones favorables à la production de viande. Elle pourrait également être utilisée pour créer une race synthétique en la croisant alternativement avec la race ovine locale OD.

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Section: ■ Results and Discussionmentioning

confidence: 55%

Section: ■ Results and Discussionmentioning

confidence: 97%

Évaluation des performances reproductives et productives d’un croisement génétique alternatif entre deux races ovines locales, Ouled Djellal et D’man

Sebkhi,

Adaouri,

Triki

et al. 2024

Rev. Elev. Med. Vet. Pays Trop.

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“…Moreover, these rates obtained remain far from the reproduction objectives in sheep farms which are 95% (Heinrichs and Radostits, 2001). Indeed, several authors agree that the parameters of fertility, seem to be in uenced by many environmental factors such as the season, climatic conditions, management, health, nutrition, the reproductive ratio ram/ewe, the age of the ewe, and the libido in rams (Snowder, 2008 andDekhili, 2010). The weaning mortality rate was higher in the Hamra breed than in the Rumbi breed, with an average of 22.60% in the Hamra breed and 14.94% in the Rumbi breed.…”

Section: Discussionmentioning

confidence: 99%

Comparative study of the reproductive and growth performances of the Hamra and Rumbi ovine breeds

MEDDAH,

Belabdi,

de Almeida

et al. 2024

Preprint

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Growth and reproductive performance traits are important economic indicators for analyzing the overall performance of breeding systems. This study aims to evaluate the comparative performance of two Algerian sheep (Rumbi and Hamra) in terms of growth and reproductive performance, and the effect of factors such as breed, season of birth, mode of birth, dam weight and age on this performance in a semi-intensive breeding system. The reproductive performance of 577 Rumbi ewes and 1328 Hamra ewes bred at the Tiaret and Saïda experimental stations respectively, was analyzed using performance monitoring data. Fertility rates for the Rumbi and Hamra breeds of 87.14% and 78.8% respectively were practically similar (p > 0.05). Litter size at birth and weaning was significantly greater in the Hamra breed than in the Rumbi breed (p < 0.05). Analysis of variance of factors (year, season of birth, and age of mother) on reproductive performance in the Hamra breed had a significant effect on reproductive performance (p < 0.05). Weaning mortality was significantly higher in the Hamra breed than in the Rumbi breed, with an average of 22.60% versus 14.94% (p < 0.05). The results of this study showed that Rumbi lambs were heavier at birth than Hamra lambs. The values observed were 4.86 kg versus 3.10 kg for the Hamra breed, with a highly significant difference (p < 0.0001), so the average daily weight gains before weaning of Rumbi lambs were higher than those of Hamra lambs, at 0.195 kg/day versus 0.113 kg/day for Hamra lambs, with a high significance (p < 0.0001). According to the findings of this study, the Hamra breed had superior reproductive potential and the Rumbi breed had superior growth. Consequently, these results could be used for selective sheep breeding, taking into account the random effects of the environment and the potential of each breed.

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Analyse discriminante des ovins dans la région est de l’Algérie

Cited by 2 publications

References 1 publication

Évaluation des performances reproductives et productives d’un croisement génétique alternatif entre deux races ovines locales, Ouled Djellal et D’man

Évaluation des performances reproductives et productives d’un croisement génétique alternatif entre deux races ovines locales, Ouled Djellal et D’man

Comparative study of the reproductive and growth performances of the Hamra and Rumbi ovine breeds

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