Estudio de las correlaciones entre valores genéticos producción – reproducción y tipo lineal de los toros Holstein en Ecuador

In Chimborazo-Ecuador study of correlations between predicted ability to transmit protein (PTAP): Production-, type, and Reproduction of Holstein sires were analysed, using the database of bulls available in the US, marketed in Ecuador; 25 bulls were selected; the data were processed by descriptive statistics, and linear correlation analysis was performed by the Pearson method using SPSS Statistic version 19. In the correlation between productive and reproductive parameters, this indicated that 56% of the characteristics are not correlated, so, they are independent. That progress directly (correlated) are: daughters’ pregnancy rate (DPR) with productive life (PL) and habitability (LIV). In addition, the daughter’s conception rate (HCR) was correlated with predicted ability to transmit protein (PTAP) and cow’s conception rate (CRC) with LIV. In reference to the correlations between productive and type parameters, it was observed that 82.61% of the characteristics were independent. Dairy temperament (DF) was correlated with PTAP and predicted ability of fat transmission (PTAF). For the correlation between reproductive and type parameters, 67.82% of the characteristics are independent. PTAT was directly correlated with cup of conception of the bull (SCR) same as index udder Hosltein (JUI) with SCR. For this reason, the producers should select the studs looking for the characteristics that are correlated, because this influence the development of livestock. En Chimborazo-Ecuador se estudió las correlaciones entre PTA (habilidad de transmisión predicha) de toros Hosltein con valores genéticos disponibles en Ecuador: Producción-Tipo lineal–Reproducción, mediante el uso de banco de datos de toros Hosltein utilizados en EEUU, que son comercializados en Ecuador; de los cuales se seleccionó 25 toros, los datos se procesaron mediante estadística descriptiva y análisis de correlación lineal por el método de Pearson utilizando SPSS versión Statistic 19. Entre parámetros productivos y reproductivos, el 56% de las características no se correlacionan, es decir son independientes; las que progresan de manera directa son PL=Vida productiva y LIV=Habitabilidad con DPR=Tasa de preñez de las hijas; P=Vida productiva; y LIV= Habitabilidad con CCR=Tasa de concepción de la vaca; PL=Vida productiva con HCR=Tasa de concepción de las hijas; PL=Vida productiva y LIV=Habitabilidad con FI= Índice de fertilidad. Con correspondencia a la correlación entre parámetros productivos y de tipo