Artigo Acesso aberto Revisado por pares

Effects of Crossbreeding on Production Traits in Dairy Cattle

1966; Elsevier BV; Volume: 49; Issue: 10 Linguagem: Inglês

10.3168/jds.s0022-0302(66)88064-5

ISSN

1529-9066

Autores

G.W. Brandt, C.C. Brannon, W. R. Harvey, Robert McDowell,

Tópico(s)

Genetics and Plant Breeding

Resumo

Productive performance of 176 crossbreds, representing 15 groups, was compared to that of the purebred contemporary Brown Swiss, Guernseys, and Holsteins.The Guernsey × Holstein and Holstein × Guernsey crosses were bred to Swiss bulls to obtain three-breed crosses.A rotational system using Guernsey or Holstein bulls, or both, was followed to obtain thirdand fourth-generation crosses.Most of the bulls used were young pedigree-selected sires.Data analyzed were the deviations of a crossbred record from records of contemporary purebreds.Crosses with Guernsey inheritance were usually above the Guernseys for milk, milk fat, and FCM, but below in milk fat test.The opposite was true when crosses with Holstein breeding were compared to Holsteins.Crosses with Brown Swiss inheritance exceeded the Brown Swiss in 66% of the comparisons.Two groups, Guernsey × Holstein × Guernsey, and Guernsey × Swiss ×

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