scholarly journals Short Communication: Study of Immune Parameters in Three Greek Dairy Sheep Breeds During the Periparturient Period

2007 ◽  
Vol 90 (12) ◽  
pp. 5567-5571 ◽  
Author(s):  
G. Theodorou ◽  
S. Fragou ◽  
R. Chronopoulou ◽  
A. Kominakis ◽  
E. Rogdakis ◽  
...  
Keyword(s):  
Short Communication ◽  
Dairy Sheep ◽  
Sheep Breeds ◽  
Immune Parameters ◽  
Periparturient Period ◽  
Communication Study

scholarly journals Survey of ß-Lactoglobulin and α<sub>S1</sub>-Casein polimorpbisms in Hungarian dairy sheep breeds and crosses on DNA level (short communication)

1999 ◽  
Vol 42 (4) ◽  
pp. 387-392 ◽  
Author(s):  
I. Anton ◽  
A. Zsolnai ◽  
L. Fesús ◽  
S. Kukovics ◽  
A. Molnár
Keyword(s):  
Milk Yield ◽  
Milk Protein ◽  
Short Communication ◽  
Dairy Sheep ◽  
Blood Samples ◽  
Cheese Making ◽  
Sheep Breeds ◽  
Pcr Rflp ◽  
Beta Lactoglobulin

Abstract. Beta-lactoglobulin (LGB) and the Welsh αS1-casein (αS1-casein D) types have been determined using PCR-RFLP tests in DNA isolated from blood samples collected from four dairy sheep breeds (Awassi, British Milk Sheep, Tsigaia, Lacaune), from Hungarian Merinos and from various crossbreeds (AwassixMerino) F1, (MerinoxLanghe) F1, (MerinoxPleven Blackhead) F1, (MerinoxPleven Blackhead ) F1x Black East Friesian). The following LGBA frequency values have been obtained: Awassi 0.3478; British Milk Sheep 0.6857; Tsigaia 0.5650; Lacaune 0.4730; Hungarian Merino 0.6767; (Awassix Merino) F1 0.4694; (MerinoxLanghe) F1 0.7777; (MerinoxPleven Blackhead) F1 0.5945; (MerinoxPleven Blackhead) F1 x Black East Friesian 0.6026. The Welsh αS1-casein variant was found in the Hungarian Merino breed only (4 homozygous and 16 heterozygous ewes). Plans for studies on the possible effects of these milk protein types, on milk yield and composition as well as on cheese making properties ofmilk and cheese yields are outlined.

PRODUCTION POTENTIAL AND BREEDING SCHEMES OF SOME MEDITERRANEAN DAIRY SHEEP BREEDS

1991 ◽  
Vol 8 ◽  
pp. 13-26 ◽  
Author(s):  
N. P. Zervas ◽  
J. Hatziminaoglou ◽  
J. Boyazoglu ◽  
A. Georgoudis
Keyword(s):  
Genetic Parameters ◽  
Management Practices ◽  
Reproductive Potential ◽  
Dairy Sheep ◽  
Phenotypic Characteristics ◽  
Production Potential ◽  
Sheep Population ◽  
Sheep Breeds ◽  
Breeding Schemes ◽  
The Mediterranean

SUMMARYExaminded are some of the most important dairy sheep breeds, among the great diversity of the Mediterranean sheep population, by focusing on their phenotypic characteristics, their productive and reproductive potential as well as on the management practices and systems of testing. Information is also given on their genetic parameters, with emphasis on heritability coefficients, and the range of respective selection and breeding schemes, applied under their particular husbandry conditions.

scholarly journals A validation study of loci associated with mastitis resistance in two French dairy sheep breeds

2019 ◽  
Vol 51 (1) ◽  
Author(s):  
Claire Oget ◽  
Charlotte Allain ◽  
David Portes ◽  
Gilles Foucras ◽  
Alessandra Stella ◽  
...  
Keyword(s):  
Validation Study ◽  
Dairy Sheep ◽  
Sheep Breeds

Effects of protein supplementation on anorexia and expression of immunity in parasitized periparturient ewes of two different breeds

2007 ◽  
Vol 2007 ◽  
pp. 94-94
Author(s):  
K. Zaralis ◽  
B.J. Tolkamp ◽  
J.G.M. Houdijk ◽  
I. Kyriazakis
Keyword(s):  
Immune Response ◽  
Food Intake ◽  
Protein Supplementation ◽  
Acquired Immunity ◽  
Disease Models ◽  
Production Potential ◽  
Sheep Breeds ◽  
Periparturient Period ◽  
Nutrient Partitioning ◽  
High Production

The breakdown of acquired immunity during the periparturient period in the ewe can be reduced by metabolizable protein (MP) supplementation (Houdijk et al 2001). Recent evidence suggests that the development of immune response results in reduced food intake (anorexia) in many disease models (Materase et al, 2005). However, it is not known whether an immune response following the periparturient relaxation of immunity is associated with a reduction in food intake and whether this is affected by protein supplementation in parasitized ewes. In addition, differences in nutrient partitioning between sheep breeds that differ in production potential may affect the ability of the hosts to express immunity and this may be reflected by differences in their magnitude and/or duration of anorexia. The aim of the present study was to test the hypotheses that: a) nematode infection during the periparturient period results in anorexia and protein supplementation can effect the degree of anorexia in ewes, and b) ewes of a high production potential breed show higher breakdown of acquired immunity than ewes of a low production potential breed, and exhibit higher degree of anorexia.

scholarly journals Genetic relationships between Spanish Assaf (Assaf.E) and Spanish native dairy sheep breeds

2008 ◽  
Vol 80 (1-3) ◽  
pp. 39-44 ◽  
Author(s):  
E. Legaz ◽  
I. Álvarez ◽  
L.J. Royo ◽  
I. Fernández ◽  
J.P. Gutiérrez ◽  
...  
Keyword(s):  
Genetic Relationships ◽  
Dairy Sheep ◽  
Sheep Breeds
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