Additive and nonadditive genetic variability for growth traits in the Turipaná Romosinuano-Zebu multibreed herd.

Elzo, Mauricio A.; Manrique, Carlos; Ossa, Gustavo; Acosta, O

doi:10.2527/1998.7661539x

Cited by 33 publications

(9 citation statements)

References 16 publications

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“…Strong maternal effect was observed for pre-weaning growth traits, mainly for weight at 120 days, as a result of a diet restricted to maternal milk. Besides being negative, the genetic correlation between direct and maternal effects (−0.21 to −0.28) was lower than the estimates reported in other studies [34]: −0.59, [35]: −0.68, [36]: −0.50.…”

Section: Discussioncontrasting

confidence: 75%

Genetic Analysis of Growth Traits in Polled Nellore Cattle Raised on Pasture in Tropical Region Using Bayesian Approaches

et al. 2013

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Components of (co)variance and genetic parameters were estimated for adjusted weights at ages 120 (W120), 240 (W240), 365 (W365) and 450 (W450) days of Polled Nellore cattle raised on pasture and born between 1987 and 2010. Analyses were performed using an animal model, considering fixed effects: herd-year-season of birth and calf sex as contemporary groups and the age of cow as a covariate. Gibbs Samplers were used to estimate (co)variance components, genetic parameters and additive genetic effects, which accounted for great proportion of total variation in these traits. High direct heritability estimates for the growth traits were revealed and presented mean 0.43, 0.61, 0.72 and 0.67 for W120, W240, W365 and W450, respectively. Maternal heritabilities were 0.07 and 0.08 for W120 and W240, respectively. Direct additive genetic correlations between the weight at 120, 240, 365 and 450 days old were strong and positive. These estimates ranged from 0.68 to 0.98. Direct-maternal genetic correlations were negative for W120 and W240. The estimates ranged from −0.31 to −0.54. Estimates of maternal heritability ranged from 0.056 to 0.092 for W120 and from 0.064 to 0.096 for W240. This study showed that genetic progress is possible for the growth traits we studied, which is a novel and favorable indicator for an upcoming and promising Polled Zebu breed in Tropical regions. Maternal effects influenced the performance of weight at 120 and 240 days old. These effects should be taken into account in genetic analyses of growth traits by fitting them as a genetic or a permanent environmental effect, or even both. In general, due to a medium-high estimate of environmental (co)variance components, management and feeding conditions for Polled Nellore raised at pasture in tropical regions of Brazil needs improvement and growth performance can be enhanced.

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Section: Discussioncontrasting

confidence: 75%

Genetic Analysis of Growth Traits in Polled Nellore Cattle Raised on Pasture in Tropical Region Using Bayesian Approaches

et al. 2013

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“…Previous research suggests that RO exhibit heat tolerance, as well as superior growth and fertility on tropical pastures compared with AG cattle (Vogt et al, 1991). Likewise, they are noted for longevity and docile temperament (Chase et al, 1997;Elzo et al, 1998).…”

Section: Introductionmentioning

confidence: 81%

Evaluation of physiological and blood serum differences in heat-tolerant (Romosinuano) and heat-susceptible (Angus) Bos taurus cattle during controlled heat challenge1

Scharf

Carroll

Riley³

et al. 2010

Journal of Animal Science

110

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A study was performed to evaluate differences in thermoregulatory ability of 2 Bos taurus breeds with known differences in heat tolerance. Nine Angus (AG; 304 +/- 7 kg of BW) and 9 Romosinuano (RO; 285 +/- 7.5 kg of BW) steers were transported to the Brody Environmental Center at the University of Missouri. Steers were housed for 18 d at thermoneutrality (TN; 21 degrees C) before initiation of heat stress (HS), which consisted of daily cyclic air temperature (26 degrees C, night; 36 degrees C, day) for 14 d. Rectal temperature and respiration rate were measured 6 times daily throughout the study. Sweat rates at shaved skin sites were recorded on specific days. Blood samples were taken once per week. Angus steers maintained rectal temperature 0.5 degrees C greater than RO at TN (P < 0.001). Likewise, respiration and sweat rates were greater (P < 0.001) in AG than RO at TN (P < 0.05). Rectal temperature increased during HS for both breeds with AG maintaining greater temperatures (P < 0.001). Both breeds increased respiration rate during HS, with AG steers exhibiting the greater rate (P < 0.001). Sweat rate increased more than 4-fold during HS (P < 0.001), followed by reduction after 7 d. Even after HS acclimation, AG exhibited the greater sweat rate (P < 0.001). Breed differences for serum leptin, creatinine, and cholesterol were found throughout the study with AG being greater than RO. Although there were no breed differences (P = 0.21) at TN, only AG steers exhibited a HS-induced increase (P < 0.05) in prolactin, creatinine, and cholesterol concentrations to suggest that an increase in rectal temperature is required for this effect. Use of rectal temperature along with endocrine markers, such as prolactin, may aid in the identification of B. taurus sensitivity to heat.

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“…En ganado Herdford, Koch et al (2004) presentan valores inferiores para el efecto directo (h 2 d = 0,15) y similares para el efecto materno (h 2 m = 0,19). Además, la correlación entre efectos directos y maternos fue muy baja (ram= -0,05), similar a lo reportado por Elzo et al (1998) para la raza Cebú (rdm= 0,02), pero no en la raza Romosinuano, en la que se presentaron valores positivos (r dm = 0,08). En este caso, la varianza de ambiente permanente como proporción de la varianza fenotípica total (r 2 ) tuvo valores similares a los hallados para el PD (7,8%), pero este valor es inferior al reportado por Koch et al (2004) quienes encontraron un valor de 26%.…”

Section: Componentes De Varianza Y Parámetros Genéticosunclassified

Parámetros y tendencias genéticas para características de crecimiento en el ganado criollo colombiano Romosinuano

Martínez

Pérez²

2006

CTA

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Se estimaron los parámetros genéticos para características de crecimiento en un núcleo de bovinos de la raza criolla Romosinuano que forman parte del Programa de Conservación del Centro de Investigación Turipaná, localizado en el Valle del Sinú (Córdoba, Colombia). Fue utilizado un modelo animal univariado para las características productivas de ‘peso al nacimiento’ (PN), ‘peso al destete’ (PD, ajustado a los 270 días), ‘peso a los 16 meses’ (P16m), ‘ganancia diaria de peso al destete’ (GPD) y ‘ganancia diaria de peso a los 16 meses’ (GP16m). Se obtuvieron valores de heredabilidad total medios (0,28; 0,43 y 0,38 para PN, PD, P16m, respectivamente); así mismo, se obtuvo un valor medio para GPD (0,42) y un valor bajo para GP16m (0,20). Los valores de heredabilidad directa siempre fueron mayores que los valores de heredabilidad materna y la correlación entre efectos directos y maternos presentó valores negativos consistentemente. Los valores genéticos anuales promedio para los efectos directos presentaron siempre una tendencia creciente a diferencia de los efectos maternos que mostraron una tendencia decreciente, con excepción del PN. Los resultados muestran valores de heredabilidad aceptables para los parámetros mencionados, mientras la tendencia indica un progreso genético leve pese a ser un núcleo de conservación cuyo objeto es preservar la variabilidad genética. Genetic parameters and trends in Colombian Romosinuano creole cattle’s growth characteristicsGenetic parameters for cattle’s growth characteristics were estimated in Romosinuano creole breed cattle forming part of the Turipaná research centre’s conservation program, located in the Valle del Sinú (Córdoba, Colombia). A univariate animal model was used for production characteristics such as birth weight (BW), weaning weight (WW, adjusted at 270 days), 16-month weight (16m W), daily weaning weight gain (DWWG) and daily weight gain at 16 months (DWG16m). Mean heritability values were 0.28, 0.43 and 0.38 for BW, WW, 16m W, respectively. Mean DWWG was 0.42 and 16m W was 0.20. Direct heritability values were always greater than maternal heritability values; correlation between direct and maternal effects consistently presented negative values. Annual mean genetic values for direct effects always presented a growing tendency compared to maternal effects which revealed a decreasing tendency (except for BW). The results presented acceptable heritability values for the aforementioned parameters whilst the tendency indicated slight genetic progress, in spite of being a nucleus for conservation aimed at preserving genetic variability.

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Additive and nonadditive genetic variability for growth traits in the Turipaná Romosinuano-Zebu multibreed herd.

Cited by 33 publications

References 16 publications

Genetic Analysis of Growth Traits in Polled Nellore Cattle Raised on Pasture in Tropical Region Using Bayesian Approaches

Genetic Analysis of Growth Traits in Polled Nellore Cattle Raised on Pasture in Tropical Region Using Bayesian Approaches

Evaluation of physiological and blood serum differences in heat-tolerant (Romosinuano) and heat-susceptible (Angus) Bos taurus cattle during controlled heat challenge1

Parámetros y tendencias genéticas para características de crecimiento en el ganado criollo colombiano Romosinuano

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