According to the expert, the crossbreeding results in a tricross calf with an ideal genetic balance for milk production in hot regions and requires attention to traceability to avoid fines.
원본 콘텐츠
The crossing strategy of the cattle rancher Josiel, from Alegrete (RS), who uses the Gir Leiteiro in Jersolanda cows (Giroland with Jersey/Holstein base), results in a tricross of great genetic interest. According to the zootechnician and specialist in dairy cattle, Guilherme Marquez, this crossing, besides adding rusticity, generates a "trigrau", with the participation of three races, being the degree of blood of the calf easily calculated. Check it out: In the specific case, it is assumed that the Jersolanda cow (a variation of Girolando) is half-blood (50% Jersey and 50% Holstein). When using a Gir Leiteiro bull (a pure zebu breed) in these females, the result is a calf with a genetic composition that balances zebu blood (rusticness) and taurine (production). The composition of the "trigrau" calf The racial composition of the calf resulting from this crossing is as follows: Thus, the calf becomes a tricross, with a final composition of 50% zebu blood (Gir Leiteiro) and 50% ...