Affiliation(s)
1. Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Guerrero, Cd. Altamirano 40660, México
2. Instituto de Ciencia Animal (ICA), San José de las Lajas 32700 Mayabeque, Cuba
ABSTRACT
The objective of the present work was to obtain pure ovine reproducers.
Starting 2010 work began with the sheep herd of the Faculty of Veterinary
Medicine and Animal Science of the Universidad Autónoma de Guerrero, located in
the municipality of Pungarabato, Guerrero State, México. The faculty is 250
meters above sea level. The climate of the region is warm subhumid, with
average temperature between 24 and 30 °C, but in the heat season maximum temperatures up to 46° down in the
shade. The rainfall regimen is 800-1,200 mm of rainfall
per year. The production of sheep in Mexico is characterized mainly by creole
animals and crosses are made with pure breeds imported from several European
countries and USA. Therefore, there is a need to form local breeds adapted to
the climatic conditions and production systems of Mexico. The sheep herd
initially had 100 animal of hair, with 70 sheep with their lambs and a
reproducer. These animals had phenotype Pelibuey, Black Belly, Doper and
Katahdin. As of May 2010, consanguineous crosses were established. During this
period the parameters were registered: date
and type of birth, weight and sex of the newborn. Data on BW (Birth Weight) of males and females
were analyzed by ANOVA (Analysis of Variance) and multiple comparison test was used for the comparison of means
(Duncan, 1955), with a significance level of P < 0.05. The first
reproducer was brown tobacco and had antlers, and the females had different
phenotypes. Up to the present time, there are twenty studs with their
respective descendants, and year 2019 the herd has 100 animals light brown and
tobacco with their lambs (30), and a reproducer. The sheep are of medium size
with 45 and 60 kg of average weight in females and male, respectively. Out of a
total of 326 females and 335 males born, with an average weight of 2.62 kg at
birth and a proliferative index of 1.41, 20 MEVEZUG males were selected to be used as reproducers
in 20 herds distributed in different sheep production units of the state of
Guerrero. From the crosses of these breeders to the females of these herds, F1
animals (MEVEZUG × Criollo) are
obtained. The sheep of different color to light brown or tobacco are discarded
for the supply; the males are fed
for the fodder in native meadows with irrigation with 95.17 ± 19.45 g of daily
gain of weight. In 2016, the trademark MEVEZUG was registered. It is concluded
that to date the color of the breed has been fixed in females and males, which is light brown and tobacco brown, the registered
productive indexes are acceptable and work will be continued to improve size
and productive indexes, through selection of the best sheep.
KEYWORDS
MEVEZUG, pure, ovine, reproducers.
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