Genetic Analyses of Growth, Carcass and Meat Quality Traits in Maternal Lines of Rabbits and Their Diallel Cross/ Análisis Genético de Caracteres de Crecimiento, Matadero y Calidad de Carne en Lineas Maternales de Conejo y en su Cruzamiento Dialélico

Mínguez, C.

doi:10.4995/thesis/10251/37981

Cited by 2 publications

(1 citation statement)

References 59 publications

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“…In Algeria, an estimated production of 8474 t of rabbit meat i.e 1% of the global world production (861 739 t) was registered in 2021 (FAO, 2021). Relatedly, meat production efficiency can be enhanced by crossbreeding to acquire the advantage of diversity between rabbit breeds and lines, through complementarity and heterotic effects and to generate new breeds or lines (Balaguer, 2014). In the same context, synthetic lines have been created and adopted as a new strategy to improve rabbit production in hot climate countries, such as Egypt and Saudi Arabia (El-Raffa, 2007;Youssef et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Morphometric traits, carcass characteristics and biochemical composition of meat between local and synthetic Algerian rabbit genotypes

Sanah,

Boudjellal,

Becila

2023

J. Indonesian Trop. Anim. Agric.

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The aim of this research was to study the genetic and sex effects on morphometric traits, carcass characteristics and biochemical composition of rabbit meat of two Algerian breeds, local population and synthetic line (ITELV2006). For this purpose, 60 animals (30 per group) from 90 d of age were used. The body weight and the morphometric traits recorded were determined using a digital weighing scale and flexible tape. At slaughter, carcass traits, and biochemical meat quality characteristics such us protein, fat, ash, moisture content and fatty acids composition were measured. The results obtained revealed that the synthetic line has higher values of morphometric measurements than the local breed. The sex factor and the interaction genotype X sex had a significant effect only on chest circumference (P < 0.05). It is also observed, that the majority of carcass characteristics were more affected by genetic than by genetics. Which body weight at slaughter of males and females derived from synthetic lines were 41% and 22% higher than local rabbits respectively. Furthermore, the new line displayed a good meat yield (60%) with a higher mean value (+ 5%) of dressing out % rather than the local one. Regarding, the proximate biochemical composition of meat, the synthetic line has shown also the highest content of protein and fat (P < 0.05). Concerning with fatty acids profile; the local breed exhibited the highest content of n3 and n6 polyunsaturated fatty acids (n3 and n6 PUFAs), consequently, the lower value of n-6: n-3 ratio (9.82) and the highest value of polyunsaturated fatty acids to saturated fatty acids (PUFAs/SFAs: 0.73). Finally, it should be emphasized that the relevant differences recorded in this experiment are assumed to be primarily genetic, thus, sex might be regarded as a minor factor. The synthetic showed better characteristics due to its genetic potential. Therefore, it is recommended to be used for Algerian meat production.

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Section: Introductionmentioning

confidence: 99%

Morphometric traits, carcass characteristics and biochemical composition of meat between local and synthetic Algerian rabbit genotypes

Sanah,

Boudjellal,

Becila

2023

J. Indonesian Trop. Anim. Agric.

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Comparison of the Blup Prediction Order and the Response to Selection in Rabbits When the Effect Year-Season Is Considered to Be Either Fixed or Random

Fernández

Abbiati

Rovegno

et al. 2018

BAG

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In close reproductive lines of rabbits reared in discrete generations, there is a strong association between the year-season (AE) and the levels of consanguinity (F). Previous studies have shown that when AE and F were considered as fixed effects in a model, the heritability and the genetic tendency were overestimated. The objective of this work was to investigate the consequences of considering AE as either a fixed (M1) or random (M2) effect on the selection of animals. A total of 15,671 records corresponding to the number of rabbits weaned in line A, from the Department of Animal Science of the Polytechnic University of Valencia, Spain, were used. The comparison of models was based on the rankings of the estimated additive genetic values in each generation and the expected response to the selection. Six scenarios were proposed, varying in selection intensities. In each one, the Spearman correlation was estimated and the percentage of discordance (D) between the animals chosen for M2 but not for M1 was calculated. The response to selection for the animals chosen by either M1 or M2, was estimated as the slope of the regression line between the means of the genetic values predicted by M2 through generations. As the selection pressure decreased, the Spearman correlations increased, decreasing the D. However, at the generation level, both estimators did not always maintain that relationship. The estimated responses to selection were similar when the selection was based on estimated breeding values obtained by using either M1 or M2. Therefore, no differences are expected between both models with respect to selection. Key words: mixed models, Spearman’s correlation, genetic trend, rabbits

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Genetic Analyses of Growth, Carcass and Meat Quality Traits in Maternal Lines of Rabbits and Their Diallel Cross/ Análisis Genético de Caracteres de Crecimiento, Matadero y Calidad de Carne en Lineas Maternales de Conejo y en su Cruzamiento Dialélico

Abstract: Genetic analysis of slaughter and carcass quality traits in crossbred rabbits from diallel cross of four maternal lines. .

Cited by 2 publications

References 59 publications

Morphometric traits, carcass characteristics and biochemical composition of meat between local and synthetic Algerian rabbit genotypes

Morphometric traits, carcass characteristics and biochemical composition of meat between local and synthetic Algerian rabbit genotypes

Comparison of the Blup Prediction Order and the Response to Selection in Rabbits When the Effect Year-Season Is Considered to Be Either Fixed or Random

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