Two-way selection for daily gain and feed conversion in a composite rabbit population.

Moura, Ana Silvia Alves Meira Tavares; Kapš, Miroslav; Vogt, D. W.; Lamberson, W. R.

doi:10.2527/1997.7592344x

Cited by 44 publications

(57 citation statements)

References 13 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For instance, post-weaning ADG was currently increased by nearly 1 g/d per generation of selection on 63-d body weight, versus 0.83 g/d for Rochambeau et al [34] and 0.45 g/d for Piles and Blasco [26] per generation by direct selection on postweaning ADG breeding values. In agreement with previous studies on rabbits selected for ADG [8,22], the lowest feed conversion ratio was observed in the rapid-growing animals, since the genetic correlation between ADG and market weight was high (r g = 0.82 to 0.91, current study, [22]). …”

Section: Symmetrical and Asymmetrical Responses For Selection On Bodysupporting

confidence: 93%

“…Successful selection in rabbits was previously shown for ADG [4,22,35] and body weight at market age [18,34]. However, a higher genetic progress for body weights and ADG was obtained in the present work, mainly because of the efficiency of selection on BLUP breeding values in comparison with selection on phenotypic values.…”

Section: Symmetrical and Asymmetrical Responses For Selection On Bodymentioning

confidence: 59%

“…The high positive genetic correlation between 63-d body weight and 4 to 9 wk ADG, was close to that reported between 70-d body weight and 3-4 to 10 wk ADG (r g = 0.91 to 0.98, [18,40]). Indeed, a moderate correlated response (r g = 0.50 to 0.64) for weaning weight in rabbits selected on market body weight has been reported previously [18,22]). Interestingly, the common (litter) effect was markedly larger than the direct additive effect for weaning weight, in accordance with Lukefahr et al [18].…”

Section: Genetic Parameters For Growth Performance and Qualitative Trmentioning

confidence: 69%

“…growth vs. reproductive traits). Selection experiments have been recently conducted on increased average daily gain (ADG) [6,22,35] or phenotypic mass at 70 d of age [18,32], and genetic parameters associated with growth have been estimated. Few within breed studies have also examined the effects of selection for an increased growth rate on carcass fatness, but lower [27] or higher contents [31] in dissectible fat weights have been demonstrated in the selected animals.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Divergent selection on 63-day body weight in the rabbit: response on growth, carcass and muscle traits

et al. 2005

View full text Add to dashboard Cite

-The effects of selection for growth rate on weights and qualitative carcass and muscle traits were assessed by comparing two lines selected for live body weight at 63 days of age and a cryopreserved control population raised contemporaneously with generation 5 selected rabbits. The animals were divergently selected for five generations for either a high (H line) or a low (L line) body weight, based on their BLUP breeding value. Heritability (h 2 ) was 0.22 for 63-d body weight (N = 4754). Growth performance and quantitative carcass traits in the C group were intermediate between the H and L lines (N = 390). Perirenal fat proportion (h 2 = 0.64) and dressing out percentage (h 2 = 0.55) ranked in the order L < H = C (from high to low). The weight and cross-sectional area of the Semitendinosus muscle, and the mean diameter of the constitutive myofibres were reduced in the L line only (N = 140). In the Longissimus muscle (N = 180), the ultimate pH (h 2 = 0.16) and the maximum shear force reached in the Warner-Braztler test (h 2 = 0.57) were slightly modified by selection.rabbit / growth / selection / genetic parameters / meat quality

show abstract

Section: Symmetrical and Asymmetrical Responses For Selection On Bodysupporting

confidence: 93%

Section: Symmetrical and Asymmetrical Responses For Selection On Bodymentioning

confidence: 59%

Section: Genetic Parameters For Growth Performance and Qualitative Trmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Divergent selection on 63-day body weight in the rabbit: response on growth, carcass and muscle traits

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Esto es debido a que hoy en día los gastos de alimentación suponen el principal coste de producción (70-80% en conejo (Moura et al, 1997), por lo que la mejora de la eficiencia alimentaria tiene repercusión directa en el balance económico de la explotación.…”

Section: Introductionunclassified

Eficiencia alimentaria en dos líneas divergentes para variabilidad ambiental del peso al nacimiento en ratones

García

Castilla

2017

Revista Complutense De Ciencias Veterinarias

View full text Add to dashboard Cite

RESUMENLa búsqueda de una mejora en la eficiencia alimentaria es uno de los principales objetivos en el ámbito de la producción animal debido a que los gastos de alimentación suponen el principal coste de producción. Por ello, el objetivo de este trabajo fue comparar la eficiencia alimentaria en dos líneas divergentes de ratón seleccionadas por su variabilidad al peso al nacimiento. Los resultados indicaron consumos semanales inferiores en la línea de baja con respecto a la de alta en algunos periodos, estas diferencias pueden relacionarse con el menor peso de los animales de baja variabilidad. En cuanto al análisis de los índices de conversión acumulados no se observaron diferencias significativas entre líneas. La robustez de los animales de baja variabilidad en este caso no va acompañada de una diferencia significativa en cuanto a eficiencia alimentaria, esperándose que ante cambios ambientales puedan beneficiarse de su homogeneidad para aumentar su supervivencia.Palabras clave: Eficiencia alimentaria, selección divergente, robustez, ratón.

show abstract

Body weight and tail length divergence in mice selected for rate of development

Rhees

Atchley

2000

J. Exp. Zool.

View full text Add to dashboard Cite

A series of mouse lines has been produced by 19 generations of restricted index selection for rate of development during early and late ontogeny. The selection program was based on an index with the following four replicated selection treatments: E+ and E– were selected to alter birth to 10‐day body weight gain while holding late gain for both selection lines constant; correspondingly, L+ and L– were selected to alter 28‐ to 56‐day body weight gain holding early gain for both lines constant. Herein, we characterize response to selection for growth rate by analyzing age‐specific mouse body weight and tail lengths and for growth curves using a logistics model. Selection on developmental rate has resulted in divergence in both age‐specific and growth curve traits. E+ and L+ lines reached identical weights during the late selection interval, then diverged to unique mature weights. E– and L– lines similarly achieved identical weights during late selection and diverged to unique mature weights. However, the shapes of early and late growth curves were significantly divergent, and at least two distinct growth patterns are shown to result from selection. Response in body weight gain was accompanied by similar, though less pronounced, change in tail length traits. Significant response during intervals of restricted growth was also found, especially in lines selected for late gain. The evolution of the growth trajectory under restricted index selection is discussed in terms of drift and available additive genetic variation and covariation. J. Exp. Zool. (Mol. Dev. Evol.) 288:151–164, 2000. © 2000 Wiley‐Liss, Inc.

show abstract

Two-way selection for daily gain and feed conversion in a composite rabbit population.

Cited by 44 publications

References 13 publications

Divergent selection on 63-day body weight in the rabbit: response on growth, carcass and muscle traits

Divergent selection on 63-day body weight in the rabbit: response on growth, carcass and muscle traits

Eficiencia alimentaria en dos líneas divergentes para variabilidad ambiental del peso al nacimiento en ratones

Body weight and tail length divergence in mice selected for rate of development

Contact Info

Product

Resources

About