Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection

In this paper, the degree of differentiation and morphostructural variability reached by the type of animal resulting from sustained directional selection, in addition to its implications for the emergence of a new sheep breed are analyzed. Twenty-five rams and 200 ewes from a sheep flock submitted...

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Autores principales:	de la Barra,R, Latorre,E, Martínez,M. E, Calderón,C
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2014
Materias:	Breeding Genetics Morphology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300052
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spelling	oai:scielo:S0717-950220140003000522015-11-16Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selectionde la Barra,RLatorre,EMartínez,M. ECalderón,C Breeding Genetics Morphology In this paper, the degree of differentiation and morphostructural variability reached by the type of animal resulting from sustained directional selection, in addition to its implications for the emergence of a new sheep breed are analyzed. Twenty-five rams and 200 ewes from a sheep flock submitted to directional selection since 1987 were measured. Thirteen body measurements were taken in other to evaluate the structural morphology and sexual dimorphism. These measurements were compared with identical measures taken in Australian Merino and Marin Magellan Meat Merino sheep breeds. The intrapopulation homogeneity was assessed using the coefficients of variation of the average percentage of body measurements. It is concluded that sustained directional selection has generated the differentiation of the morphostructural format of the subject population compared to the main Merino-type breeds in the Chilean Patagonia. The population shows a similar (and in some cases lower) morphostructural variability than those found in recognized sheep breeds in Chile, so it is possible to state that this population behaves like a different animal group, with breed characteristics.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.32 n.3 20142014-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300052en10.4067/S0717-95022014000300052
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Breeding Genetics Morphology
spellingShingle	Breeding Genetics Morphology de la Barra,R Latorre,E Martínez,M. E Calderón,C Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
description	In this paper, the degree of differentiation and morphostructural variability reached by the type of animal resulting from sustained directional selection, in addition to its implications for the emergence of a new sheep breed are analyzed. Twenty-five rams and 200 ewes from a sheep flock submitted to directional selection since 1987 were measured. Thirteen body measurements were taken in other to evaluate the structural morphology and sexual dimorphism. These measurements were compared with identical measures taken in Australian Merino and Marin Magellan Meat Merino sheep breeds. The intrapopulation homogeneity was assessed using the coefficients of variation of the average percentage of body measurements. It is concluded that sustained directional selection has generated the differentiation of the morphostructural format of the subject population compared to the main Merino-type breeds in the Chilean Patagonia. The population shows a similar (and in some cases lower) morphostructural variability than those found in recognized sheep breeds in Chile, so it is possible to state that this population behaves like a different animal group, with breed characteristics.
author	de la Barra,R Latorre,E Martínez,M. E Calderón,C
author_facet	de la Barra,R Latorre,E Martínez,M. E Calderón,C
author_sort	de la Barra,R
title	Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
title_short	Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
title_full	Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
title_fullStr	Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
title_full_unstemmed	Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
title_sort	morphostructural differentiation and variability of merino sheep breed under sustained directional selection
publisher	Sociedad Chilena de Anatomía
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300052
work_keys_str_mv	AT delabarrar morphostructuraldifferentiationandvariabilityofmerinosheepbreedundersustaineddirectionalselection AT latorree morphostructuraldifferentiationandvariabilityofmerinosheepbreedundersustaineddirectionalselection AT martinezme morphostructuraldifferentiationandvariabilityofmerinosheepbreedundersustaineddirectionalselection AT calderonc morphostructuraldifferentiationandvariabilityofmerinosheepbreedundersustaineddirectionalselection
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Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection

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