Bibliographic citations
Rubio, P., (2018). Estimación de parámetros fenotípicos y genéticos para medidas de carcasa en cuyes (Cavia porcellus) del genotipo Cieneguilla [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/3599
Rubio, P., Estimación de parámetros fenotípicos y genéticos para medidas de carcasa en cuyes (Cavia porcellus) del genotipo Cieneguilla [Tesis]. : Universidad Nacional Agraria La Molina; 2018. https://hdl.handle.net/20.500.12996/3599
@phdthesis{renati/246335,
title = "Estimación de parámetros fenotípicos y genéticos para medidas de carcasa en cuyes (Cavia porcellus) del genotipo Cieneguilla",
author = "Rubio Arias, Pablo Giovanny",
publisher = "Universidad Nacional Agraria La Molina",
year = "2018"
}
The objective of the study was to estimate the phenotypic and genetic parameters for carcass measurements in guinea pigs (Cavia porcellus) of the Cieneguilla genotype, for its development the work was divided into two phases: in the first, the most relevant measures in the estimation were determined of carcass weight, taking as reference the following biometric measurements, before and after the benefit, of 150 male guinea pigs: live weight to benefit (PV), body length (LC), head length (LCA), head width ( AC), loin length (LL), loin width (AL), thoracic perimeter (PT), thigh circumference (PM), thigh length (LM), shoulder circumference (PB), shoulder length (LB) and average square of the rump (CMG), as well as the carcass weight (PC). The data were analyzed to determine the best regression equation and to establish the best predictive linear model of carcass weight. The Step-Wise Regression process of the SAS statistical package was used. Combinations of independent variables in the model revealed that PV, PT, AC and LL give a better explanation of CP at the benefit age (R2 = 0.71, Cp-Mallows = 1.63). In the second phase, in order to estimate the genetic parameters for the measures of the predictor model, 684 pups were evaluated (335 females and 349 males), descendants of 22 parents and 330 new mothers of 60 days, (15 females per male) in continuous breeding. The body weights were taken (PB) in 3 different periods: 30 days of age (PV30); 60 days of age (PV60) and 90 days of age (PV90); At the same time, measurements were taken of: AC, PT and LL, with a total of 3 measurements -in time- for each variable. After the benefit, these same measures were recorded plus the PC; for later, through a fraternal analysis of half-sibs, the following heritability values were estimated for the measures and weights before the benefit (90 ± 7 days): PV90 = 0.47 ± 0.03, ACv = 0.68 ± 0.10, LLv = 0.44 ± 0.07 and PTv = 0.13 ± 0.03; and, after the benefit: PC90 = 0.38 ± 0.09, ACb = 0.52 ± 0.10, LLb = 0.12 ± 0.06 and PTb = 0.26 ± 0.08. The genetic parameters obtained indicate high heritabilities, with the exception of the chest perimeter, whose heritability is low, but which came to conform the predictor model, the Cieneguilla genotype, demonstrates good meat conformation, with males being larger and heavier than females.
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