Essai de sélection sur la forme de la courbe de croissance chez le poulet. Dispositif expérimental et premiers résultats d'ensemble

Ricard, F.H.; Marche, G.; Bourdiol, Renée; Poisson, H.

doi:10.1186/1297-9686-7-4-427

Cited by 39 publications

(26 citation statements)

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“…Body weight (BW) is a complex quantitative trait resulting from various developmental processes (Brockmann et al 1998). Studies on mice and chickens suggest that genetic regulation of BW varies with age (Ricard 1975;Cheverud et al 1996;Aggrey 2003;Carlborg et al 2003Carlborg et al , 2006Gao et al 2006). While additive effects on growth are more pronounced at a later age, epistasis plays an important role in early growth between 1 and 8 weeks in White Leghorn · red jungle fowl crosses and for broiler · layer crosses (Carlborg et al , 2004(Carlborg et al , 2006, and there was no significant genetic correlation between hatch weight and post-hatch BW (Abdellatif 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Most known QTL for BW were derived from either intercrosses within a breed (Van Kaam et al 1999;Jacobsson et al 2005) or crosses between breeds (Sewalem et al 2002;Deeb & Lamont 2003;Jennen et al 2004;Sasaki et al 2004). In this study, we have completed a genome-wide QTL analysis of an F 2 resource population created from an intercross of two chicken lines that were divergently selected for high (HG) or low (LG) BW at 8 and 36 weeks of age (Ricard 1975). The base population originated from commercial broiler chickens.…”

Section: Introductionmentioning

confidence: 99%

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Mapping QTL for growth and shank traits in chickens divergently selected for high or low body weight

et al. 2010

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An F(2) population (695 individuals) was established from broiler chickens divergently selected for either high (HG) or low (LG) growth, and used to localize QTL for developmental changes in body weight (BW), shank length (SL9) and shank diameter (SD9) at 9 weeks. QTL mapping revealed three genome-wide QTL on chromosomes (GGA) 2, 4 and 26 and three suggestive QTL on GGA 1, 3 and 5. Most of the BW QTL individually explained 2-5% of the phenotypic variance. The BW QTL on GGA2 explained about 7% of BW from 3 to 7 weeks of age, while that on GGA4 explained 15% of BW from 5 to 9 weeks. The BW QTL on GGA2 and GGA4 could be associated with early and late growth respectively. The GGA4 QTL also had the largest effect on SL9 and SD9 and explained 7% and 10% of their phenotypic variances respectively. However, when SL9 and SD9 were corrected with BW9, a shank length percent QTL was identified on GGA2. We identified novel QTL and also confirmed previously identified loci in other chicken populations. As the foundation population was established from commercial broiler strains, it is possible that QTL identified in this study could still be segregating in commercial strains.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mapping QTL for growth and shank traits in chickens divergently selected for high or low body weight

et al. 2010

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“…Examining 4 breeds (White Cornish, New Hampshire, White Leghorn and Orpington), 3 highly inbred lines of White Leghorn, and 9 broiler lines, we found the ratio y + /A to range in value from 0.332 to 0.392 (Knizetova et al, 1983(Knizetova et al, , 1985(Knizetova et al, , 1991a (Ricklefs, 1968(Ricklefs, , 1973 (Ricard, 1975;Marks, 1978;Tzeng and Becker, 1981;Parks, 1982;Zelenka et al, 1986 …”

Section: Growth Patternmentioning

confidence: 90%

Comparative study of growth curves in poultry

Knízetová¹,

Hyánek²,

Hyánková³

et al. 1995

Genet. Sel. Evol.

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“…Little response to antagonistic selection has been reported by M c C arthy and D oolittle (1977) from mice, by R icard (1975) from B roilers and by A bplanalp (1963) from turkeys. E isen (1993) selected for eight generations for increase in weights (body weight and hind quarter proportion) and against fat (epididymal fat pad, subcutaneous fat).…”

Section: Introductionmentioning

confidence: 99%

Long‐term selection for antagonistic traits

Mohamed

Rottmann

Pirchner

1998

J Animal Breeding Genetics

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Summary Within family selection for 3–5 week gain (G3‐5) and against 8‐week weight (BW8) was practiced for 54 generations in a mouse line of eight full‐sib families per generation. The genetic correlation was 0.56 between the two traits, and rate of selection was intended to be 25%. The selection index derived from the realized parameters of the first generations of the experiment was −0.63 × BW8 ± 1.0 × G3‐5. Selection was successful insofar as it changed the traits in the desired directions, but this was achieved at considerable costs, i.e. gains were 10 to 15% of gains of direct, unimpeded selection. Zusammenfassung Langfristige antagonistische Selektion in einer Mauslinie Die Selektion fuer Zuwachs zwischen 3 und 5 Wochen (G3‐5) und gegen 8 Wochengewicht (BW8) wurde innerhalb Vollgeschwisterfamilien praktiziert. Die Linie wurde durch 54 Generationen in 8 Vollgeschwisterfamilien bei 25% Remontierung fortgefuehrt. Der aus realisierten Parametern der Generationen 6 bis 12 erstellte Selektionsindex war −0.63 × BW8+1.0 × G3‐5. Selektion war erfolgreich soweit es die Richtung der Veraenderungen betrifft. Dies wurde aber mit geringen Fortschritten erkauft, d.h. diese waren nur 10 bis 15% von Fortschritten, die Selektion auf ein Einzelmerkmal erwarten haette lassen.

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Essai de sélection sur la forme de la courbe de croissance chez le poulet. Dispositif expérimental et premiers résultats d'ensemble

Cited by 39 publications

References 0 publications

Mapping QTL for growth and shank traits in chickens divergently selected for high or low body weight

Mapping QTL for growth and shank traits in chickens divergently selected for high or low body weight

Comparative study of growth curves in poultry

Long‐term selection for antagonistic traits

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