Dairy cattle cross-breeding in the tropics: Performance of secondary cross-bred populations

Syrstad, Ola

doi:10.1016/0301-6226(89)90008-0

Cited by 37 publications

(22 citation statements)

References 3 publications

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“…This observation is in contrast with findings from other studies (Syrstad, 1989;Rege, 1998), and could be because of the small amount of data used, and the fact that no correction was made for the different breed combinations used in the different studies. The widest mean range (1.4-4.5) for relative performance was observed in MYL for the F1 and 75 percent crosses in the highlands.…”

Section: Grading Upcontrasting

confidence: 55%

“…In the two-breed rotation system, there is great variability in genotypic composition from generation to generation, depending on the sire breed used. This is not practical for small-scale operations Syrstad, 1989;Madalena, Peixoto and Gibson, 2012). The most widely reported success, the Kilifi Plantation rotation programme (Mackinnon, Thorpe and Barker, 1996;Kahi et al, 2000), has never been expanded beyond the single ranch programme or replicated elsewhere.…”

Section: Limitations Of Cross-breeding Methodsmentioning

confidence: 99%

“…These effects have been observed in cross-breeding studies for milk production in the tropics. Syrstad (1989) reviews results obtained from F1 and F2 B. indicus and B. taurus crosses for milk production. In his article, a deterioration in performance because of the breakdown of epistatic gene effects was found to occur between the F1 and F2 for all traits studied (age at first calving (AFC), calving interval (CI), milk yields and lactation lengths (LLs)).…”

Section: Genetic Backgroundmentioning

confidence: 99%

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Cross-breeding cattle for milk production in the tropics: achievements, challenges and opportunities

Galukande

Mulindwa

Wurzinger

et al. 2013

Anim. Genet. Resour.

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SummaryThis paper reviews experiences with cross-breeding for milk production in the tropics. Data were compiled from 23 different studies evaluating the performance of different grades of cross-bred animals as well as local breeds. Relative performance of indigenous breeds compared with different grades of cross-breeds was calculated for three climatic zones. Traits considered were milk yield per lactation, age at first calving, services per conception, lifetime milk yield and total number of lactations completed. At 50 percent Bos taurus blood, lactation milk yields were 2.6, 2.4 and 2.2 times higher than those of local cattle in the highland, tropical wet and dry, and semi-arid climatic zones, respectively; lactation lengths increased by 1.2, 1.2 and 1.9 months in the above-mentioned climatic zones, respectively; there was a reduction in calving interval by 0.8 times and in age at first calving by 0.9 times. Similarly, cross-breds with 50 percent B. taurus genes had 1.8 times higher lifetime milk yields and a 1.2 times higher number of total lactations. Although cross-breeding faces a number of challenges such as better infrastructure, higher demand for health care, there are many advantages of using it. These are higher production per animal, higher income for the families and provision of high-value food. It is therefore likely to continue to be an important livestock improvement tool in the tropics in the future, where farmers can provide sufficient management for maintaining animals with higher input requirements and access to the milk market can be secured.Keywords: Cattle, cross-breeding, milk production, tropics ResumenEste artículo hace un repaso por las experiencias obtenidas con el cruzamiento de razas para la producción de leche en los trópicos. Se recopilaron datos de 23 estudios diferentes que evaluaron los rendimientos de animales con distinto grado de cruce así como de animales de razas autóctonas. Se compararon los rendimientos de las razas autóctonas con los de animales con distinto grado de cruce para tres zonas climáticas. Las características consideradas fueron el rendimiento lechero por lactación, la edad al primer parto, el número de servicios por concepción, la producción lechera total a lo largo de la vida del animal y el número total de lactaciones completadas. Con un 50 por ciento de sangre Bos taurus, los rendimientos lecheros por lactación fueron 2,6, 2,4 y 2,2 veces mayores que los del ganado bovino autóctono en las zonas climáticas de las Tierras Altas, Tropical Húmeda y Seca y Semiárida, respectivamente; la duración de la lactación se incrementó en 1,2, 1,2 y 1,9 meses en las zonas climáticas anteriormente mencionadas, respectivamente; el intervalo entre partos y la edad al primer parto se redujeron, respectivamente, 0,8 y 0,9 veces. Asimismo, los animales cruzados con una genética 50 por ciento Bos taurus tuvieron rendimientos lecheros, para la totalidad de su vida productiva, 1,8 veces mayores y un número total de lactaciones 1,2 veces mayor. Si bien el cruzamiento implica afr...

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Section: Grading Upcontrasting

confidence: 55%

Section: Limitations Of Cross-breeding Methodsmentioning

confidence: 99%

Section: Genetic Backgroundmentioning

confidence: 99%

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Cross-breeding cattle for milk production in the tropics: achievements, challenges and opportunities

Galukande

Mulindwa

Wurzinger

et al. 2013

Anim. Genet. Resour.

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“…Gir cows are well adapted to high temperature conditions, are resistant to some tropical diseases [1,2], and have been continuously selected for milk yield in Brazil [3,4]. However, many farmers have used crossbred Gir (Bos indicus) and Holstein cows (Bos taurus) to improve dairy production in the Brazil [3,4], and this crossbreeding programme is considered to be a success and economically viable [5].…”

Section: Introductionmentioning

confidence: 99%

Milk yield, residual milk, oxytocin and cortisol release during machine milking in Gir, Gir × Holstein and Holstein cows

Negrão¹,

Marnet²

2006

Reprod. Nutr. Dev.

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-This study evaluated the effect of exclusive machine milking on oxytocin (OT) and cortisol (CORT) release, and on milk yield and residual milk in Gir (group Gir), Holstein (group Hol) and crossbred animals (group GirHol). Six animals from each group were submitted to experimental milkings. As expected, milk yield was significantly higher in the Hol group than in the groups GirHol and Gir, and group GirHol produced more milk than the Gir group. In contrast, all groups exhibited significant but similar levels of OT, although OT increased more rapidly during milking for the groups Hol and GirHol than for the Gir group. In addition, CORT levels measured during and after milking were significantly influenced by the group. The Gir group showed higher levels of CORT than the groups GirHol and Hol. The lower performances of the Gir breed can not be explained by a less efficient milk ejection reflex because all cows studied released enough OT and had an effective milk ejection.zebu / crossbred / milking / oxytocin / cortisol

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“…Unspecialized cattle farmers in Brazil have used crossbred Gir (Bos indicus) H olstein (Bos taurus) cows to produce both milk and calves during the spring and summer in extensive systems [1] because these crossbred animals are well adapted to tropical conditions [39,40]. In many cases, this…”

Section: Introductionmentioning

confidence: 99%

Effect of calf suckling on oxytocin, prolactin, growth hormone and milk yield in crossbred Gir $\times$ Holstein cows during milking

Negrão

Marnet

2002

Reprod. Nutr. Dev.

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International audienceThis study evaluated the effect of different milking managements on oxytocin, prolactin and growth hormone release in Gir $\times$ Holstein cows. Six cows were suckled by their calves, before and after milking (SM group); another six cows were submitted to exclusive milking (M group). High OT levels were observed during suckling of the SM group, however both groups had similar levels of OT during milking. The SM group presented PRL levels significantly higher than the M group, however only during suckling. For GH levels, the SM group showed higher levels than the M group, however this difference was significant only during the first suckling, cleaning of the teats and at the beginning of machine milking. Despite these results, SM cows produced more milk (milking plus suckling) than M cows, however milk obtained by milking was similar for both groups

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Dairy cattle cross-breeding in the tropics: Performance of secondary cross-bred populations

Cited by 37 publications

References 3 publications

Cross-breeding cattle for milk production in the tropics: achievements, challenges and opportunities

Cross-breeding cattle for milk production in the tropics: achievements, challenges and opportunities

Milk yield, residual milk, oxytocin and cortisol release during machine milking in Gir, Gir × Holstein and Holstein cows

Effect of calf suckling on oxytocin, prolactin, growth hormone and milk yield in crossbred Gir $\times$ Holstein cows during milking

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