Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite
Five milk recording methods were compared: three methods with register of the production of two milkings with biweekly (BW), monthy (M) and bimontly (BM) frequency; and two methods (A & C) with register of only one milking , alternating the morning and afternoon milkings monthly. The dairy production records of 509 lactations of HPB, Jersey and mixed HPB-Gir cows were used. For 425 lactations of 176 cows, it was possible to correct the total production by age and blood degree, and the express it as a deviation from the contemporary companions. For effects of selection on milk production, all the methods studied resulted in a similar genetic gain, for cows as well as for bulls, enabling the choice between them to be made solely on the basis of practical considerations
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1979
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Subjects: | GANADO DE LECHE, PRODUCCION DE LECHE, REGISTROS DE PRODUCCION, FRECUENCIA, SELECCION, GENETICA, BRASIL, |
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KOHA-OAI-BVE:443232020-01-23T20:21:21ZFrequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite 91288 Martínez, M.L. 89216 Madalena, F.E. 61527 De Freitas, A.F. 1979Five milk recording methods were compared: three methods with register of the production of two milkings with biweekly (BW), monthy (M) and bimontly (BM) frequency; and two methods (A & C) with register of only one milking , alternating the morning and afternoon milkings monthly. The dairy production records of 509 lactations of HPB, Jersey and mixed HPB-Gir cows were used. For 425 lactations of 176 cows, it was possible to correct the total production by age and blood degree, and the express it as a deviation from the contemporary companions. For effects of selection on milk production, all the methods studied resulted in a similar genetic gain, for cows as well as for bulls, enabling the choice between them to be made solely on the basis of practical considerationsFive milk recording methods were compared: three methods with register of the production of two milkings with biweekly (BW), monthy (M) and bimontly (BM) frequency; and two methods (A & C) with register of only one milking , alternating the morning and afternoon milkings monthly. The dairy production records of 509 lactations of HPB, Jersey and mixed HPB-Gir cows were used. For 425 lactations of 176 cows, it was possible to correct the total production by age and blood degree, and the express it as a deviation from the contemporary companions. For effects of selection on milk production, all the methods studied resulted in a similar genetic gain, for cows as well as for bulls, enabling the choice between them to be made solely on the basis of practical considerationsGANADO DE LECHEPRODUCCION DE LECHEREGISTROS DE PRODUCCIONFRECUENCIASELECCIONGENETICABRASILPesquisa Agropecuaria Brasileira - EMBRAPA (Brasil) |
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GANADO DE LECHE PRODUCCION DE LECHE REGISTROS DE PRODUCCION FRECUENCIA SELECCION GENETICA BRASIL GANADO DE LECHE PRODUCCION DE LECHE REGISTROS DE PRODUCCION FRECUENCIA SELECCION GENETICA BRASIL |
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GANADO DE LECHE PRODUCCION DE LECHE REGISTROS DE PRODUCCION FRECUENCIA SELECCION GENETICA BRASIL GANADO DE LECHE PRODUCCION DE LECHE REGISTROS DE PRODUCCION FRECUENCIA SELECCION GENETICA BRASIL 91288 Martínez, M.L. 89216 Madalena, F.E. 61527 De Freitas, A.F. Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
description |
Five milk recording methods were compared: three methods with register of the production of two milkings with biweekly (BW), monthy (M) and bimontly (BM) frequency; and two methods (A & C) with register of only one milking , alternating the morning and afternoon milkings monthly. The dairy production records of 509 lactations of HPB, Jersey and mixed HPB-Gir cows were used. For 425 lactations of 176 cows, it was possible to correct the total production by age and blood degree, and the express it as a deviation from the contemporary companions. For effects of selection on milk production, all the methods studied resulted in a similar genetic gain, for cows as well as for bulls, enabling the choice between them to be made solely on the basis of practical considerations |
format |
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topic_facet |
GANADO DE LECHE PRODUCCION DE LECHE REGISTROS DE PRODUCCION FRECUENCIA SELECCION GENETICA BRASIL |
author |
91288 Martínez, M.L. 89216 Madalena, F.E. 61527 De Freitas, A.F. |
author_facet |
91288 Martínez, M.L. 89216 Madalena, F.E. 61527 De Freitas, A.F. |
author_sort |
91288 Martínez, M.L. |
title |
Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
title_short |
Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
title_full |
Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
title_fullStr |
Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
title_full_unstemmed |
Frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
title_sort |
frequ{ring}ncia dos registros na seleç{acute}o para produç{acute}o de leite |
publishDate |
1979 |
work_keys_str_mv |
AT 91288martinezml frequringnciadosregistrosnaselecacuteoparaproducacuteodeleite AT 89216madalenafe frequringnciadosregistrosnaselecacuteoparaproducacuteodeleite AT 61527defreitasaf frequringnciadosregistrosnaselecacuteoparaproducacuteodeleite |
_version_ |
1756053832760033280 |