EFFECT OF GENOTYPE, SIRE, SEX, GESTATION LENGTH ON BIRTH WEIGHT OF LAMBS

The birth weight of lambs has an essential role in satisfying sheep production. Also reflected as primary factor later development of young organism. In the study included: gestation length, sire (two sires in each genotype during parenting), sex of lambs at birth, the birth weight of single lambs from well nourished mature ewes of the next genotypes: Miss (1), Wurttemberg (2) and Ile de France (3). The highest birth weight was obtained in genotype 3 with an average birth weight of 4.63 kg in sire 2 and 4.44 kg in sire 1 with a difference of 0.19 kg. Gestation length of genotype 1 ranged from 144 to 153 days; genotype 2, from 148 to 154 days and the genotype 3, from 144 to 151days. The highest average birth weight in genotype 1 with gestation length of 153 days weighed 5.10 kg. Average birth weights of male lambs in all genotypes were higher than the females. There were a very significant effect of genotype, sire, gestation length on birth weight of lambs (P 0.05). The result achieved therefore can be explained that the effect of genotype, sire and gestation length and the interaction between subjects effects such as the next: Sire*Gestation length; Sire*Sex; Gestation length*Sex; Sire*Gestation length*Sex were highly and significantly affected the birth weight of lambs (P<0.01; P<0.05). The interactions between subjects' effects will be a good indicator to be acquainted more on their influence in a certain trait.

[1]  M. Petrović,et al.  EFFECT OF MATING METHOD, SEX AND BIRTH TYPE ON GROWTH OF LAMBS , 2013 .

[2]  Maksimovi,et al.  ESTIMATION OF PHENOTYPIC AND GENETIC TRENDS OF THE GROWTH TRAITS IN LIPSKA AND SVRLJIG SHEEP , 2013 .

[3]  M. Petrović,et al.  THE LINEAR RELATIONSHIP BETWEEN GROWTH TRAITS OF SHARPLANINA LAMBS IN EXTENSIVE FARMING PRACTICES , 2013 .

[4]  R. Ulloa-Arvizu,et al.  Breed and breed x environment interaction effects for growth traits and survival rate from birth to weaning in crossbred lambs. , 2012, Journal of animal science.

[5]  T. Parkinson,et al.  Uterine environment as a regulator of birth weight and body dimensions of newborn lambs. , 2012, Journal of animal science.

[6]  M. Petrović,et al.  Estimation of phenotypic and genetic trends of the growth traits in Lipska and Svrljig sheep. , 2012 .

[7]  A. Thompson,et al.  The birthweight and survival of Merino lambs can be predicted from the profile of liveweight change of their mothers during pregnancy , 2011 .

[8]  M. Yilmaz,et al.  Growth characteristics in lambs of estrus synchronized ewes in grower conditions , 2011, Turkish Journal of Veterinary &amp; Animal Sciences.

[9]  M. Petrović,et al.  Influence of environmental factors on birth weight variability of indigenous Serbian breeds of sheep , 2011 .

[10]  I. Adeyinka,et al.  Relationship Between Gestation Length and Birth Weight in Nigerian Sheep and Their Crosses , 2010 .

[11]  M. Talebi,et al.  GENETIC AND NON-GENETIC FACTORS AFFECTING MORTALITY IN LORI-BAKHTIARI LAMBS , 2009 .

[12]  N. Memiši,et al.  Effect of environmental and paragenetic factors on birth mass variability of Mis sheep populations. , 2009 .

[13]  M. Yaqoob,et al.  ENVIRONMENTAL FACTORS AFFECTING BIRTH WEIGHT IN LOHI SHEEP , 2008 .

[14]  P. Gluckman,et al.  Maternal constraint in sheep breeds with diverse birth weight , 2007 .

[15]  D. Gardner,et al.  Factors affecting birth weight in sheep: maternal environment. , 2007, Reproduction.

[16]  J. Arendonk,et al.  Reproductive performance and mortality rate in Menz and Horro sheep following controlled breeding in Ethiopia , 2006 .

[17]  M. Yaqoob,et al.  Comparison of three terminal sire breeds for weaning weight of lambs kept under upland grassland conditions in the Northeast of England. , 2005 .

[18]  M. Yaqoob,et al.  ENVIRONMENTAL FACTORS AFFECTING WEANING WEIGHT IN LOHI SHEEP , 2003 .

[19]  Safdar Ali,et al.  Effect of body weight of ewes on birth weight of lambs in Rambouillet breed of sheep , 2000 .

[20]  A. Trimnell,et al.  Genetic and phenotypic relationships between gestation length, litter size and litter birth weight in Yankasa sheep , 1993 .

[21]  F. A. Thrift,et al.  Relationship between gestation length of artificially inseminated ewes and number, weight and sex of lambs born. , 1972, Journal of Animal Science.

[22]  C. M. Kincaid.  Influence of the Sire on the Birth Weight of Lambs , 1943 .