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Breeding records, including 649 inseminations during fall and winter at a dairy farm in a subtropical area of Western Mexico (24°N; 24°C, mean annual temperature 24°C) were analyzed to document effects of sex-sorted semen from commercial Gyr bulls, estrus synchronization protocol, inseminator, sire ...

Mellado, M.; Coronel, F.; Estrada, A.; Ríos, F. G.
Springer, Amsterdam, The Netherlands
Tropical Animal Health and Production, 2010, 42, 7, pp 1493-1496

The ancestry of New World cattle was investigated through the analysis of mitochondrial and Y chromosome variation in Creoles from Argentina, Brazil, Mexico, Paraguay and the United States of America. Breeds that influenced the Creoles, such as Iberian native, British and Zebu, were also studied....

Ginja, C.; Penedo, M. C. T.; Melucci, L.; Quiroz, J.; Martínez López, O. R.; Revidatti, M. A.; Martínez-Martínez, A.; Delgado, J. V.; Gama, L. T.
Blackwell Publishing Ltd, Oxford, UK
Animal Genetics, 2010, 41, 2, pp 128-141

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