Zoometry of two Criollo cattle populations from Venezuela
In Venezuela, Criollo cattle, introduced by colonizers, were raised under various conditions and for different purposes. These led to the formation of two lines: the Criollo Llanero (CrLl), kept under savanna conditions, practically disappeared; and the Criollo Río Limón (CrRL) conserved in northwestern region of Zulia state, in danger of extinction. The “Cooperative Project MAC - UCV at the Los Llanos Experimental Station” included CrRL in pure and cross mating, as well as CrLl in absorption mating. Fifty CrRL foundation cows and 50 CrLl cows purchased in the Llano were the subjects of this article to describe them morphologically and compare them through statistical analysis. Some observations were eliminated due to temper that prevented taking some measurements; concluding 46 CrRL and 43 CrLl. The F test was applied to distinguish the differences between the lines of each measure. The Line effect was significant (p<0.05) or highly significant (p<0.01) for 21 of 24 variables. CrRL outperformed CrLl in the relevant dimensions. The Weight in CrRL was 20% higher than in CrLl (p<0.01). In the other dimensions, the advantage ranged between 3 and 8%, in favor of CrRL. The correlations between relevant variables were positive and significant (p<0.01), always higher in CrRL. The few negative sign correlations were not significant (p>0.05). Fifty years after the observations were mader, time altered the research justification, from to generate basic knowledge, today its relevance lies in the valuation of autochthonous germplasm and its contribution to the genetic variability necessary to couple specific genotypes with particular breeding systems and altered environmental conditions. The decline of these populations reported in the literature reveals that it might be late to recommend their conservation and assessment and that the initiatives for their preservation and use have been insufficient and ineffective.
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Asociacion Latinoamericana de Produccion Animal
2020
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Ordóñez Vela, Jorge Anibal Plasse, Dieter |
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Ordóñez Vela, Jorge Anibal Plasse, Dieter Zoometry of two Criollo cattle populations from Venezuela |
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Ordóñez Vela, Jorge Anibal Plasse, Dieter |
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Ordóñez Vela, Jorge Anibal |
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Zoometry of two Criollo cattle populations from Venezuela |
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Zoometry of two Criollo cattle populations from Venezuela |
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Zoometry of two Criollo cattle populations from Venezuela |
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Zoometry of two Criollo cattle populations from Venezuela |
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Zoometry of two Criollo cattle populations from Venezuela |
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zoometry of two criollo cattle populations from venezuela |
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In Venezuela, Criollo cattle, introduced by colonizers, were raised under various conditions and for different purposes. These led to the formation of two lines: the Criollo Llanero (CrLl), kept under savanna conditions, practically disappeared; and the Criollo Río Limón (CrRL) conserved in northwestern region of Zulia state, in danger of extinction. The “Cooperative Project MAC - UCV at the Los Llanos Experimental Station” included CrRL in pure and cross mating, as well as CrLl in absorption mating. Fifty CrRL foundation cows and 50 CrLl cows purchased in the Llano were the subjects of this article to describe them morphologically and compare them through statistical analysis. Some observations were eliminated due to temper that prevented taking some measurements; concluding 46 CrRL and 43 CrLl. The F test was applied to distinguish the differences between the lines of each measure. The Line effect was significant (p<0.05) or highly significant (p<0.01) for 21 of 24 variables. CrRL outperformed CrLl in the relevant dimensions. The Weight in CrRL was 20% higher than in CrLl (p<0.01). In the other dimensions, the advantage ranged between 3 and 8%, in favor of CrRL. The correlations between relevant variables were positive and significant (p<0.01), always higher in CrRL. The few negative sign correlations were not significant (p>0.05). Fifty years after the observations were mader, time altered the research justification, from to generate basic knowledge, today its relevance lies in the valuation of autochthonous germplasm and its contribution to the genetic variability necessary to couple specific genotypes with particular breeding systems and altered environmental conditions. The decline of these populations reported in the literature reveals that it might be late to recommend their conservation and assessment and that the initiatives for their preservation and use have been insufficient and ineffective. |
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AT ordonezvelajorgeanibal zoometryoftwocriollocattlepopulationsfromvenezuela AT plassedieter zoometryoftwocriollocattlepopulationsfromvenezuela AT ordonezvelajorgeanibal zoometriadedospoblacionesdeganadocriollodevenezuela AT plassedieter zoometriadedospoblacionesdeganadocriollodevenezuela AT ordonezvelajorgeanibal zoometriadeduaspopulacoesdegadocrioulodavenezuela AT plassedieter zoometriadeduaspopulacoesdegadocrioulodavenezuela |
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oai:ojs.ojs.alpa.uy:article-28052021-09-18T03:32:13Z Zoometry of two Criollo cattle populations from Venezuela Zoometría de dos poblaciones de ganado Criollo de Venezuela Zoometria de duas populações de gado Crioulo da Venezuela Ordóñez Vela, Jorge Anibal Plasse, Dieter genetic resources creole limonero venezuela Recursos geneticos Venezuela criollo limonero recursos genéticos crioulo limonero Venezuela In Venezuela, Criollo cattle, introduced by colonizers, were raised under various conditions and for different purposes. These led to the formation of two lines: the Criollo Llanero (CrLl), kept under savanna conditions, practically disappeared; and the Criollo Río Limón (CrRL) conserved in northwestern region of Zulia state, in danger of extinction. The “Cooperative Project MAC - UCV at the Los Llanos Experimental Station” included CrRL in pure and cross mating, as well as CrLl in absorption mating. Fifty CrRL foundation cows and 50 CrLl cows purchased in the Llano were the subjects of this article to describe them morphologically and compare them through statistical analysis. Some observations were eliminated due to temper that prevented taking some measurements; concluding 46 CrRL and 43 CrLl. The F test was applied to distinguish the differences between the lines of each measure. The Line effect was significant (p<0.05) or highly significant (p<0.01) for 21 of 24 variables. CrRL outperformed CrLl in the relevant dimensions. The Weight in CrRL was 20% higher than in CrLl (p<0.01). In the other dimensions, the advantage ranged between 3 and 8%, in favor of CrRL. The correlations between relevant variables were positive and significant (p<0.01), always higher in CrRL. The few negative sign correlations were not significant (p>0.05). Fifty years after the observations were mader, time altered the research justification, from to generate basic knowledge, today its relevance lies in the valuation of autochthonous germplasm and its contribution to the genetic variability necessary to couple specific genotypes with particular breeding systems and altered environmental conditions. The decline of these populations reported in the literature reveals that it might be late to recommend their conservation and assessment and that the initiatives for their preservation and use have been insufficient and ineffective. En Venezuela, el ganado criollo, introducido por los colonizadores, fue criado bajo condiciones diversas y, con diferentes propósitos. Ello indujo la formación de dos líneas: el Criollo Llanero (CrLl), mantenido bajo condiciones de sábana, prácticamente desaparecido; y el Criollo Río Limón (CrRL) conservado en el noroeste del estado Zulia, en peligro de extinción. El “Proyecto Cooperativo MAC - UCV en la Estación Experimental de Los Llanos” incluyó CrRL en cría pura y cruzamiento, así como CrLl en apareamiento de absorción. Cincuenta vacas CrRL de fundación y 50 vacas CrLl compradas en el Llano fueron el sujeto de este trabajo con el objetivo de describirlas morfológicamente y compararlas mediante análisis estadístico. Se eliminaron observaciones debido al temperamento que impidió tomar algunas medidas; concluyendo 46 CrRL y 43 CrLl. Se aplicó la prueba F para distinguir las diferencias entre líneas de cada medida. Línea resultó significativo (p<0.05) o altamente significativo (p<0.01) para 21 de 24 variables. CrRL superó a CrLl en las dimensiones relevantes. El Peso en CrRL fue 20% mayor que en CrLl (p<0.01). En las demás dimensiones, la ventaja osciló entre 3 y 8 %, a favor de CrRL. Las correlaciones entre variables relevantes resultaron positivas y significativas (p<0.01), siempre mayores en CrRL. Las pocas correlaciones de signo negativo resultaron no significativas (p>0.05). Cincuenta años después de realizadas las observaciones reportadas, el tiempo alteró la justificación; y de generar información básica, hoy su relevancia radica en la valoración del germoplasma autóctono y su contribución a la variabilidad genética necesaria para acoplar genotipos específicos a sistemas de cría particulares y condiciones ambientales alteradas. La declinación de estas poblaciones reportada en la literatura evidencia que podría ser tarde para recomendar su conservación y valoración y que las iniciativas para la preservación y aprovechamiento de ambas poblaciones han resultado insuficientes e inefectivas. Na Venezuela, o gado crioulo, introduzido pelos colonizadores, foi criado em diferentes condições e para diferentes fins, formando duas linhas: o Crioulo Llanero (CrLl), mantido em condições de manta, praticamente desapareceu; e o Crioulo Río Limón (CrRL) conservado no noroeste do estado de Zulia, em perigo de extinção. O "Projeto Cooperativo MAC - UCV na Estação Experimental de Los Llanos" incluiu o CrRL no cruzamento puro e cruzado, bem como o CrLl no acasalamento por absorção. Cinqüenta vacas de fundação CrRL e 50 vacas CrLl adquiridas no Llano foram o objeto deste trabalho com o objetivo de descrevê-las morfologicamente e compará-las por meio de análise estatística. As observações foram eliminadas devido ao temperamento que impedia a realização de algumas medições; concluindo 46 CrRL e 43 CrLl. O teste F foi aplicado para distinguir as diferenças entre as linhas de cada medida. A linha foi significativa (p <0,05) ou altamente significativa (p <0,01) para 21 de 24 variáveis. CrRL superou CrLl nas dimensões relevantes. O Peso em CrRL foi 20% maior do que em CrLl (p <0,01). Nas demais dimensões, a vantagem variou entre 3 e 8%, a favor do CrRL. As correlações entre as variáveis relevantes foram positivas e significativas (p <0,01), sempre maiores no CrRL. As poucas correlações de sinais negativos não foram significativas (p> 0,05). Cinqüenta anos depois de feitas as observações relatadas, o tempo alterou a justificativa; e para gerar informações básicas, hoje sua relevância reside na valorização do germoplasma autóctone e na sua contribuição para a variabilidade genética necessária para acoplar genótipos específicos a sistemas de criação particulares e condições ambientais alteradas. O declínio dessas populações relatado na literatura revela que pode ser tarde para recomendar sua conservação e avaliação e que as iniciativas para sua preservação e uso têm sido insuficientes e ineficazes. Asociacion Latinoamericana de Produccion Animal 2020-11-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo cientifico original Texto application/pdf https://ojs.alpa.uy/index.php/ojs_files/article/view/2805 Latin American Archives of Animal Production; Vol. 28 No. 3-4 (2020): Numero dedicado a las especies criollas; 91-101 Archivos Latinoamericanos de Producción Animal; Vol. 28 Núm. 3-4 (2020): Numero dedicado a las especies criollas; 91-101 2075-8359 1022-1301 spa https://ojs.alpa.uy/index.php/ojs_files/article/view/2805/1300 Copyright (c) 2020 Jorge Anibal Ordóñez Vela https://creativecommons.org/licenses/by-nc-sa/4.0 |