Milk yield, fat yield and lactation length of five crossbred (Holstein x Gir) groups (1/2, 3/4, 7/8, 15/16 e 31/32) were studied. Data were divided in three groups, that holded the following number of records and number of herds: group 1- 9,817 lactation records, 3,012 first lactation records and 122 herds; group 2- 7,839 lactation records, 2,334 first lactation records and 75 herds: group 3- 5,236 lactation records, 1,468 first lactation records and 38 herds. The means for milk yield, fat yield and length of lactation in groups 1, 2 and 3, for all lactation records were, respectively: 4,532±17kg, 157±1kg and 290±1 days, 4,514±18kg, 157±1kg and 292±1 days, and 4,495±22kg, 156±1kg, and 293±1 days. The 31/32 crossbred group showed better performance than the other groups in milk yield, fat yield and length of lactation. The 7/8 and 15/16 crossbred groups presented intermediary performance and 1/2 crossbred group showed the lowest performance.
Dairy cattle; crossbred; milk yield; fat yield; lactation length
