1. Both are important for human health. Hybrids are produced to add only certain characteristics, i.e., Body weights, ability to adapt to climatic or harsh weather conditions, Disease, and pest resistance, drought tolerance, ability to walk long distances during times of drought, carcass weight, and ability to gain weight in a short period. All these traits are just for the market and for the farmer to have enough income. Breeds have different characteristics. So you choose some traits best suited for your geographical area and then breed for better results and performance.

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Crossbred Dairy Cattle is the Answer to Improve Environment Dependent Productive and Physiological Responses -A Review

• March 2019
• Pakistan Journal of Zoology 51(2):773-788
• DOI: 10.17582/journal.pjz/2019.51.2.773.788
• Juan Augusto Hernández Rivera et al.

[Abstract

Authors' Contribution JAHR, JMO, LJGM, OFPR and RJMB wrote the initial manuscript. JAHR, JMO, ACGC, and MIU corrected the manuscript attending the reviewer's suggestions and language of the manuscript. Heat stress has severe effects in organisms. Dairy cattle is susceptible to suffer behavioral, physiological and reproductive damages due heat stress. Breeding searching for tolerant heat stress genes and their incorporation in crossbreeding programs has gained interest in dairy cattlemen concerned by the global warming and greenhouse effect in the environment. This review shows and update of the crossbreeding in dairy cattle in both hemispheres. Here, is reviewed the effect of heat stress on dairy cattle; the mechanism of autoregulation; the benefits of the heterosis in crossbreeding cattle by hybridization; the body condition score in crossbred dairy cattle; the yields in crossbreds; here is also discussed that even when there have been many crossbreeding in dairy cattle, but when the producer choose a system crossbreeding in dairy cows always mostly contemplate only body weight, body condition score, dry matter intake, and feed efficiency. Is suggested to contemplate other traits like genetic potential, lactation (305 d), lactation number, fertility rate, and economic impact to observe clarity the potential of each crossbred in dairy cattle in the future.]