At the time of choosing a bull we think that market aim, in our case mainly to the breeders (are the base of the pyramid), and this already us support.
What breeder produces? calves, whose fate is highly variable. He sells them for winter, produces its own bulls, retain females for replacement, pregnant heifers and the sells, them retains all and makes its full production cycle, etc..
All produce to supply a market consumer of meat, in our case large part to consumption (Lightweight cattle) and a small part to export (cattle heavy).
Would that is what you seek all the breeders?? produce efficiently at the lowest cost.
Therefore in the breeding system that prevails is grazing, characterized by its low cost of production and it is adapted to the physiology of the ruminant (herbivore), pastures that will be transformed into high-value proteins and without the presence of cattle would be blighted its potential. Not there are transportation, processing and distribution of rations. When the content of meal fiber is less to the 5%, pork doubled in efficiency to the cattle and at the same time compete with the human diet (contains those values of fiber). However when the fiber reaches the 30% or more, or grass, the ruminant is the only one capable of transforming it into first quality protein and no species can compete with it.
In this way we have defined the schema of production: Production system – Market – Genetics.
Them players that select try to that is fit to great diversity of environments but without losing of view that our objectives are those of the breeder, where must care for the capacity of adaptation of the animal to the environment and have in has that no improves genetic will equip losses of calves from its conception until its life reproductive.
Depending on the market (Bulls of 380 to 450 kg) and type of cows (380 to 450 kg) that predominate in herds of breeding in accordance with the environment is that we chose bulls of small-to medium-sized (frame 3 to 5, 700 to 900 kg).
In them, We are looking for own selection attributes and its predecessors. Are important those limbs, hoof health, the fertility, ease of childbirth (moderate to low weight to the birth), length of gestation, ease of delivery of the daughters, maternal ability, puberty, scrotal circumference, seminal characteristics, interval parto-celo, weight gains (the higher weight gain this genetically associated with higher weight at birth, to commercial completion more late and greater adult size), size (its relationship with the market and the production system: the greater size requires a high level food and in times of shortage the animals of high potential are those more handicapped), muscularidad, the rib eye area, marmoreo and deposition fat.
We have to think that the selection means genetic change, slow and long-lasting in the time and that due to the correlations genetic always will have to make concessions.
“The presence of interactions between genetics and system productive cancels the value of the extrapolation …”
“Not enough with that those animals selected are genetic and individually more productive, is the system using that must express greater productivity” (1)
(1) Genetic bovine and production in grazing, Dr. Hector H. Molinuevo.
John Martin Narbaïtz, Veterinarian, Technical Director of C.A.B.A.
