Growth characteristics and lipid distribution in two lines of chicken selected for low or high abdominal fat

Leclercq, B.; Guy, Gérard; Rudeaux, F.

doi:10.1186/1297-9686-21-1-69

Cited by 15 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1983) found no evidence that selection in pigs for an index that included low backfat thickness caused relocation of body fat from subcutaneous to other sites in the body, but only a small reduction in total fat was achieved by selection. Selection for high and low abdominal fat in chickens produced a greater response in abdominal triglycerides than in total triglycerides, suggesting local control of fat deposition at different sites in chickens (Leclercq et al, 1989).…”

Section: Discussionmentioning

confidence: 94%

Correlated responses in body composition based on selection for different indicator traits in mice.

Eisen

Coffey²

1990

Journal of Animal Science

View full text Add to dashboard Cite

Correlated responses in whole-body composition were determined in 12-wk-old male mice from replicate lines selected for 12 generations for high (HF) or low (LF) epididymal fat pad weight as a percentage of body weight (EPID) and high (HL) or low (LL) hind carcass weight as a percentage of body weight. The HF and LF lines diverged (P less than .01) in body fat percentage (FAT) and subcutaneous depot fat by 93 and 71%, respectively, of the control line (RC) mean. EPID increased (P less than .01) proportionately more than FAT in the HF line; EPID decreased (P less than .01) proportionately less than FAT in LF. Protein, fat and water as a percentage of empty body weight showed negative correlated responses (P less than .01) due to selection for EPID, but lean body mass, body weight and body length had positive correlated responses (P less than .01). Correlated responses of fat-free protein and ash percentage were minor. Correlated responses in HL and LL were the mirror images of those in HF and LF, but they generally were of smaller magnitude. The results indicate that, although there are high positive genetic correlations between fat depots in mice, local control of lipogenesis and(or) lipolysis exists at different sites of fat deposition. Further, the lack of correlated responses in fat-free percentage of protein (and percentage of ash) suggests that additive genetic variances are low for these traits and(or) the genetic correlations of these traits with the selection criteria are low.

show abstract

Section: Discussionmentioning

confidence: 94%

Correlated responses in body composition based on selection for different indicator traits in mice.

Eisen

Coffey²

1990

Journal of Animal Science

View full text Add to dashboard Cite

show abstract

“…In broilers, feed efficiency may also be improved as a correlated response to selection for younger age at market weight. However, increasing body weight at a given age has several consequences such as increased fatness and maintenance cost at a given age [16,23]. Since regulations impose a minimum slaughter age of 81 d in "Label Rouge" chickens, selecting for increased growth rate is not permitted.…”

Section: Introductionmentioning

confidence: 99%

“…Indirect selection on correlated traits should therefore provide alternative selection strategies. The criteria to be considered for indirect selection may be abdominal fatness [16] as well as growth curve parameters, since lines selected on the shape of the growth curve exhibit different feed conversion ratios [26]. Furthermore, selection strategies to improve the feed conversion ratio have been investigated primarily for fast-growing broilers, and their application to slowgrowing label-type chickens may not be straightforward.…”

Section: Introductionmentioning

confidence: 99%

Genotype by environment interactions in relation to growth traits in slow growing chickens

et al. 2007

View full text Add to dashboard Cite

-Since feed conversion ratio (FCR) is higher in slow-growing "Label Rouge" chickens than in broiler chickens, it is important to work on its improvement in this breed. However, this involves rearing animals in cages (C), an environment very different from that used for selection (in floor pens, S) and production (outdoor, E). The aim of this study was to evaluate the importance of genotype by environment (G × E) interactions between S, C, and E environments, to find the best way to select for FCR, using 2002 related animals. Growth curve parameters were estimated and body composition measured. Individual feed conversion ratios (FCR) were recorded between 8 and 10 weeks in C. The presence of G × E interactions was assessed by the genetic correlations between the same trait recorded in different environments. Moderate but significant G × E interactions were detected for carcass traits, a significant one was observed between E and S or C for growth curve parameters but none between C and S. If G × E interactions are set aside, i.e. selecting on traits recorded in C, abdominal fatness is the best indirect selection criterion for FCR but if they are taken in account then leg yield or growth curve parameters in S and growth curve parameters in E are better.interaction / genetic parameters / feed efficiency / chicken / selection

show abstract

Genotype by environment interactions in relation to growth traits in slow growing chickens

et al. 2007

View full text Add to dashboard Cite

Since feed conversion ratio (FCR) is higher in slow-growing "Label Rouge" chickens than in broiler chickens, it is important to work on its improvement in this breed. However, this involves rearing animals in cages (C), an environment very different from that used for selection (in floor pens, S) and production (outdoor, E). The aim of this study was to evaluate the importance of genotype by environment (G × E) interactions between S, C, and E environments, to find the best way to select for FCR, using 2002 related animals. Growth curve parameters were estimated and body composition measured. Individual feed conversion ratios (FCR) were recorded between 8 and 10 weeks in C. The presence of G × E interactions was assessed by the genetic correlations between the same trait recorded in different environments. Moderate but significant G × E interactions were detected for carcass traits, a significant one was observed between E and S or C for growth curve parameters but none between C and S. If G × E interactions are set aside, i.e. selecting on traits recorded in C, abdominal fatness is the best indirect selection criterion for FCR but if they are taken in account then leg yield or growth curve parameters in S and growth curve parameters in E are better.

show abstract

Growth characteristics and lipid distribution in two lines of chicken selected for low or high abdominal fat

Cited by 15 publications

References 4 publications

Correlated responses in body composition based on selection for different indicator traits in mice.

Correlated responses in body composition based on selection for different indicator traits in mice.

Genotype by environment interactions in relation to growth traits in slow growing chickens

Genotype by environment interactions in relation to growth traits in slow growing chickens

Contact Info

Product

Resources

About