@article{MAKHILLJAVA200981134,
    title = {Growth and Feed Efficiency of Pure and F1 Pelibuey Lambs Crossbred with Specialized Breeds for Production of Meat},
    journal = {Journal of Animal and Veterinary Advances},
    volume = {8},
    number = {1},
    pages = {26-32},
    year = {2009},
    issn = {1680-5593},
    doi = {javaa.2009.26.32},
    url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2009.26.32},
    author = {G.J. Canton,Q.R. Bores,R.J. Baeza,F.J. Quintal,R.R. Santos and},
    keywords = {Lambs,genotypes,energy,growth,feed efficiency},
    abstract = {Growth and feed efficiency were evaluated for pure and F1 crossbred Pelibuey (Pb) male lambs. Four different genotypes were used: pure PelibueyxPelibuey (PbPb), Black Head DorperxPb (BHDPb), White DorperxPb (WDPb) and KatahdinxPb (KdPb). Thirty six lambs with an average live weight (average&plusmn;SD) of 20.81&plusmn;2.7 kg, were distributed in a randomized block design with a 4x3 factorial arrangement: 4 genotypes and 3 dietary ME concentrations (2.2, 2.5 and 2.8 Mcal kg<SUP>-1</SUP> DM). There were 2 experimental periods, representing the initial (33 days) and final phases (42 days) of lamb fattening. During these 2 phases, 19 and 14.8% dietary crude protein concentration, respectively were used. A higher (p&lt;0.05) DMI, CPI and MEI was observed in the KdPb lambs in comparison with PbPb in the final phase of growth, however not an effect was found (p&lt;0.05) due to the genotype upon the variables in the total growing phase. The ADG, DMI, CPI and MEI observed (average&plusmn;SEM) was 182&plusmn;6 (g animal<SUP>-1</SUP>), 79&plusmn;1.4 and 12.8&plusmn;0.2 (g kg<SUP>-1</SUP> LW<SUP>0.75</SUP>) and 197&plusmn;3.6 (kcal kg<SUP>-1</SUP> LW<SUP>0.75</SUP>), respectively. Lambs fed with 2.8 (Mcal ME kg<SUP>-1</SUP> DM), had (p&lt;0.01) the highest DMI, CPI, ADG and better FG in the initial phase and a highest (p&lt;0.05) ADG in the final stage of growth. The animals fed with a highest levels energy had (p&lt;0.01) a better FG in the whole fattening period (6.5<SUP>a</SUP>, 5.1<SUP>b</SUP> and 4.7<SUP>b</SUP>&plusmn;0.3). No interaction effect (p&gt;0.05) were detected between the genotype and energy level. The genotypes specialized for meat production, expressed a similar ADG and feed efficiency to the pure pelibuey lambs. The best performance for all genotypes was obtained using a 2.8 Mcal ME kg<SUP>-1</SUP> DM diet.}
    }