Multiple-trait genetic parameters and genetic evaluation of udder-type traits in Lacaune dairy ewes

Abstract

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

“…The morphological traits of sheep udder have been researched in Mediterranean breeds, particularly in dairy sheep breeds, such as Churra (Fernández et al, 1995;De La Fuente et al, 1996), Lacaune (Marie-Etancelin et al, 2005) and Sarda (Casu et al, 2006), but not in meat breeds. The study of mammary morphological traits in meat breeds and their relationship with milk production should be of special interest for rearing ability, and also for knowing dairy potentiality and yield diversification of some breeds traditionally considered for meat purpose.…”

An analysis of the genetic relationship between udder health and udder conformation traits in South African Jersey cows

“…These traits are routinely measured in most animal breeding schemes. In addition, linear-type traits are more heritable than mastitis incidence and SCS (Rupp and Boichard, 1999;DeGroot et al, 2002;Marie-Etancelin et al, 2005).…”

The Course of Machine Milking in Small Ruminants

“…The values of genetic and phenotypic correlation coefficients between somatic cell counts and morphological traits of the udder suggest that some of the latter, such as e.g. the depth, shape and attachment of the udder, and the location and the size of teats, need to be taken into consideration in the evaluation of suitability of small ruminants for machine milking Peris et al, 1999;Dzidic et al, 2004;Legarra & Ugarte, 2005;Marie-Etancelin et al, 2005). In relation to the influence of many factors on bulk tank somatic cell counts (BTSCC) it seems justified to show the course and consequences of machine milking in small ruminants on milk quality and health of the teat end.…”

“…Positive and significant correlations between morphology traits of the udder are included in the evaluation of the udder and selection of animals (Fernández et al, 1995). Valuation of the udders is performed as part of testing in ewes of the following breeds: Churra, Manchega, Latxa and Lacaune (Marie-Etancelin et al, 2005). Cisternal size and udder morphology traits are correlated with milk secretion rate and milk emission kinetics during machine milking in dairy ewes (Labussière, 1988;Marnet & McKusik, 2001;Ayadi et al, 2011).…”