Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds

Morphological traits of the whole udder (circumference, width, height, and length), teats (angle, length and width), udder cistern (teat opening and cistern height), and milk yield were measured over one lactation in a total of 18 ewes (nine Chilota and nine Suffolk Down sheep) belonging to the same...

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Autores principales:	Martínez,María E, Calderón,Cecilia, de la Barra,Rodrigo, de la Fuente,L. Fernando, Gonzalo,Carlos
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	mammary morphology teats dairy sheep
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100011
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spelling	oai:scielo:S0718-583920110001000112018-10-01Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep BreedsMartínez,María ECalderón,Ceciliade la Barra,Rodrigode la Fuente,L. FernandoGonzalo,Carlos mammary morphology teats dairy sheep Morphological traits of the whole udder (circumference, width, height, and length), teats (angle, length and width), udder cistern (teat opening and cistern height), and milk yield were measured over one lactation in a total of 18 ewes (nine Chilota and nine Suffolk Down sheep) belonging to the same experimental flock (Centro Experimental INIA Butalcura, Chiloé, Chile). Analysis of variance showed significant effects for breed, sheep within breed, and stage of lactation. Chilota ewes evidenced greater udder circumference (433 mm), udder length (86 mm), teat opening (96°), and milk yield (947 mL d-1) than Suffolk Down ewes (410 mm, 77 mm, 93°, and 559 mL d-1, respectively). Udder circumference, udder width, udder length, cistern height and teat size significantly decreased throughout lactation. Repeatabilities of all traits were between 0.17 and 0.60; the highest repeatability was for udder circumference. This trait is easy to measure and had a discriminatory value for breed differentiation. In conclusion, Chilota sheep had a dairy aptitude greater than Suffolk Down sheep and similar to Spanish and Mediterranean dairy sheep breeds at beginning of their breeding programs.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.1 20112011-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100011en10.4067/S0718-58392011000100011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	mammary morphology teats dairy sheep
spellingShingle	mammary morphology teats dairy sheep Martínez,María E Calderón,Cecilia de la Barra,Rodrigo de la Fuente,L. Fernando Gonzalo,Carlos Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
description	Morphological traits of the whole udder (circumference, width, height, and length), teats (angle, length and width), udder cistern (teat opening and cistern height), and milk yield were measured over one lactation in a total of 18 ewes (nine Chilota and nine Suffolk Down sheep) belonging to the same experimental flock (Centro Experimental INIA Butalcura, Chiloé, Chile). Analysis of variance showed significant effects for breed, sheep within breed, and stage of lactation. Chilota ewes evidenced greater udder circumference (433 mm), udder length (86 mm), teat opening (96°), and milk yield (947 mL d-1) than Suffolk Down ewes (410 mm, 77 mm, 93°, and 559 mL d-1, respectively). Udder circumference, udder width, udder length, cistern height and teat size significantly decreased throughout lactation. Repeatabilities of all traits were between 0.17 and 0.60; the highest repeatability was for udder circumference. This trait is easy to measure and had a discriminatory value for breed differentiation. In conclusion, Chilota sheep had a dairy aptitude greater than Suffolk Down sheep and similar to Spanish and Mediterranean dairy sheep breeds at beginning of their breeding programs.
author	Martínez,María E Calderón,Cecilia de la Barra,Rodrigo de la Fuente,L. Fernando Gonzalo,Carlos
author_facet	Martínez,María E Calderón,Cecilia de la Barra,Rodrigo de la Fuente,L. Fernando Gonzalo,Carlos
author_sort	Martínez,María E
title	Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
title_short	Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
title_full	Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
title_fullStr	Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
title_full_unstemmed	Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds
title_sort	udder morphological traits and milk yield of chilota and suffolk down sheep breeds
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100011
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Udder Morphological Traits and Milk Yield of Chilota and Suffolk Down Sheep Breeds

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