Comportamiento reproductivo de los genotipos Cebú y 5/8 Cebú x 3/8 Simmental en la región central de Cuba
Fecha
2018
Autores
Hernández Barreto, Miguel Alejandro
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El objetivo fue evaluar el comportamiento reproductivo de hembras de los genotipos Cebú y 5/8 Cebú x 3/8 Sim-mental en una granja genética de la región central de Cuba. La investigación se desarrolló entre los años 2010 y 2014. Se consideraron 255 registros individuales de vacas; 200 y 55 hembras de los genotipos Cebú (106 de la varie-dad blanca y 94 bermeja) y 55 del 5/8 Cebú x 3/8 Simmental, respectivamente. Se calcularon los intervalos parto-primera inseminación (IPPS), parto-gestación (IPG) y periodo interpartal (IPP) y servicios por gestación (S/G). Además, se evaluaron los efectos del genotipo, la paridad, el trimestre y año del parto sobre los indicadores antes mencionados. Se calcularon los estadígrafos descriptivos de los indicadores y para determinar el efecto de cada fuen-te de variación sobre ellos se empleó un modelo lineal general. Existió baja eficiencia reproductiva en los tres geno-tipos, con una situación más favorable en el 5/8 Cebú x 3/8 Simmental. El año de parto, el genotipo y la paridad in-fluyeron (P < 0,05) sobre el IPPS, IPG e IPP. El trimestre de parto solo influyó (P < 0,05) sobre el IPG. Ningún factor tuvo influencia sobre los servicios por gestación. Se concluye que en los tres genotipos estudiados existió un marcado deterioro de los indicadores reproductivos, influenciados por el genotipo, trimestre, año del parto y paridad.
The aim of this paper was to evaluate the reproductive behavior of female Zebú and 5/8 Zebu x 3/8 Simmental on a genetic farm in the central region of Cuba. The research was made between 2010 and 2014. The individual records of 255 cows; 200 Zebus (106 White and 94 Bermeja) and 55 crossbreds (5/8 Zebu x 3/8 Simmental) were included. The calving-first insemination interval (CFI) and calving-gestation interval (CGI), inter-calving period (ICP), and service per gestation (S/G) were calculated. Besides, the effects of genotype, parity, quarter and year of calving were evaluated using the above indicators. The descriptive stratigraphy was calculated, and a general linear model was used to determine the effects of each variation source. The three genotypes showed low reproductive efficiency, though slightly more favorable for 5/8 Zebu x 3/8 Simmental. The calving year, genotype, and parity influenced (P < 0.05) the CFI, CGI, and ICP. The calving quarter only influenced (P < 0.05) the CGI. The gestation service was not influenced by any factor. It was concluded that the three genotypes studied underwent high deterioration of re-productive indicators, influenced by the genotype, quarter, calving year, and parity.
The aim of this paper was to evaluate the reproductive behavior of female Zebú and 5/8 Zebu x 3/8 Simmental on a genetic farm in the central region of Cuba. The research was made between 2010 and 2014. The individual records of 255 cows; 200 Zebus (106 White and 94 Bermeja) and 55 crossbreds (5/8 Zebu x 3/8 Simmental) were included. The calving-first insemination interval (CFI) and calving-gestation interval (CGI), inter-calving period (ICP), and service per gestation (S/G) were calculated. Besides, the effects of genotype, parity, quarter and year of calving were evaluated using the above indicators. The descriptive stratigraphy was calculated, and a general linear model was used to determine the effects of each variation source. The three genotypes showed low reproductive efficiency, though slightly more favorable for 5/8 Zebu x 3/8 Simmental. The calving year, genotype, and parity influenced (P < 0.05) the CFI, CGI, and ICP. The calving quarter only influenced (P < 0.05) the CGI. The gestation service was not influenced by any factor. It was concluded that the three genotypes studied underwent high deterioration of re-productive indicators, influenced by the genotype, quarter, calving year, and parity.
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Palabras clave
Comportamiento Reproductivo, Cebú, Reproducción, Anestro, Reproductive Behavior, Zebu, Reproduction, Anestrus