Genetic influences on growth and partition of fat between depots and its distribution in fowl carcasses

Shahin, KA; Abdallah, OY; Shmeis, AR

doi:10.1051/rnd:19900604

Cited by 5 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Significant differences between dual-purpose type breed and broiler type breed in muscle weight distribution and in fat weight distribution. have been reported by ABDALLAH et al (1990) and SHAHIN et al (1990). Also, significant differences between breeds in bone weight distribution have been reported by SHAHIN et al (1996).…”

Section: Live Body Weightmentioning

confidence: 65%

“…Separate effects of breed, sex and nutrition on carcass composition of chickens were reported by BROADBENT et al (1981); ORR et al (1984); MARKS (1990); BARTOV (1998); SMITH and PESTI (1998) and WISEMAN and LEWIS (1998). Variation in lean, bone and fat distribution due to breed have been investigated by ABDALLAH et al (1990), SHAHIN et al (1990) and SHAHIN et al (1996). The combined effects of breed, sex, and diet and their interactions on carcass characteristics have received little attention and partitioning of bird response due to these effects have not been widely reported.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of breed, sex and diet and their interactions on carcass composition and tissue weight distribution of broiler chickens

Shahin

El-Azeem

2005

Arch. Anim. Breed.

View full text Add to dashboard Cite

Effects of breed, sex and diet and their interactions on carcass composition and tissue weight distribution of broiler chickens AbstractThe effects of breed (Hubbard and Anak), sex and diet (two levels of protein (high or low) with two levels of crude fiber (low or high) at each level of protein) on carcass composition and distribution of tissues over the carcass were studied. Carcass composition and ratios of muscle: bone, muscle: fat and meat: bone in the carcass did not differ significantly between breed groups. Male carcasses had more muscle, more bone, more fat-free carcass, higher ratios of muscle: bone, muscle: fat but less fat, less meat and lower meat: bone ratio than female carcasses. Carcasses of chicks fed high protein (with either low or high fiber) diet had more muscle than carcasses of chicks fed low protein (with either low or high fiber) diet. Carcasses of chicks fed high fiber (with either low or high protein) diet had more bone but less meat than carcasses of chicks fed low fiber (with either low or high protein) diet. Increasing both protein and fiber in the diet resulted in lowering carcass fat, consequently raising muscle: fat ratio. Breed and sex did not influence the distribution of muscle and meat throughout the carcass parts. Breed differences in fat weight distribution were not significant. Anak had significantly higher proportions of bone in wing and neck than Hubbard did. The proportion of total carcass muscle in breast, drumstick, wing were not significantly affected by diet. Carcasses of chicks fed high fiber (with either low or high protein) diet had higher proportion of total meat in thigh and neck than carcasses from chicks fed low fiber (with either low or high protein) diet. Diet had no significant effect on bone weight distribution. Increasing crude fiber in diets resulted in lowering proportion of total fat in breast, thigh but increasing proportion of total fat in drumstick and wing. Breed x sex, breed x diet and sex x diet interactions did not significantly influence most of carcass traits indicating that the factors under consideration act independently of each other's. Significant sex x diet interactions was found for carcass fat and boneless carcass relative to live body weight: the sexual dimorphism in low protein diet is more pronounced than in high protein diets.

show abstract

Section: Live Body Weightmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Effects of breed, sex and diet and their interactions on carcass composition and tissue weight distribution of broiler chickens

Shahin

El-Azeem

2005

Arch. Anim. Breed.

View full text Add to dashboard Cite

show abstract

“…This aspect is of special importance, as in livestock breeding not only is the total fat important, but also the distribution of fat in the body. Although there is some evidence of a genetic basis for fat distribution from breed differences in different farm animal species (Shahin et al 1990;Ermias et al 2002), and in model animals (Bü nger & Hill 2005), the genetic basis of fat partitioning into different depots is not well understood.…”

Section: Introductionmentioning

confidence: 99%

In vivo prediction of internal fat weight in Scottish Blackface lambs, using computer tomography

Lambe¹,

Conington²,

McLean³

et al. 2006

J Animal Breeding Genetics

View full text Add to dashboard Cite

From a calibration trial involving computer tomography (CT) scanning and dissection of 45 lambs, a prediction equation was derived to estimate total internal fat weight in Scottish Blackface lambs from measurements taken on cross-sectional CT images. Using data from two cross-sectional images (at the hip and loin) internal fat can be predicted with relatively high accuracy (adjusted R(2) = 62.2%, r = 0.79). The derived equation was then used to predict internal fat weights in a further 427 Scottish Blackface lambs from a separate trial. Phenotypic correlations were calculated between predicted internal fat weight and weights of total carcass fat, muscle and bone, predicted using previously derived equations. When considering absolute tissue weights, adjusted for fixed effects, internal fat showed the strongest positive correlation with carcass fat (0.58), followed by muscle (0.36), and then by bone (0.32). When tissue weights were adjusted for fixed effects and total carcass weight (so considering tissue weights relative to size), internal fat showed a lower correlation with carcass fat weight (0.36) and negative correlations with muscle (-0.35) and bone (-0.19). These results provide the basis for more complex studies of relationships (phenotypic and genetic) between internal fat in hill lambs and economically important traits, such as carcass composition and survival of lambs, and tissue levels in different depots in hill ewes.

show abstract

“…Growth performance Several authors [17][18][19][20] reported the differences between genotypes in BW are to be dependent. It means that different strain performs the body weight as its potential genetic for growth.…”

Section: Resultsmentioning

confidence: 99%

Response of Two Strains of Commercial Broilers to Variation in Feeding Strategies: Re-test Feeding Practices of Broiler Farming

Radiyatunnisah,

Indarsih,

Syamsuhaedi

et al. 2023

Act Sci VetSci

View full text Add to dashboard Cite

A study was conducted to reveal the effect of different feeding strategies on performance and the body composition of two strains of commercial broilers from 1 to 5 wks. of age. This study was also to re-test the grower practical feeding in the field. One hundred-and twenty-day-old chicks of each strain were randomly allocated to eight dietary treatments with a 2 × 4 factorial arrangement. They were fed to a starter diet (S) containing 200 g protein/kg diet and 3120 kcal ME/kg diet and a finisher diet (F) containing 190 g CP and 3300 kcal of ME/kg. Four different feeding strategies were applied, R1-SSSFF, three weeks fed starter diet and 2 weeks fed finisher diets. Similar codes for R2-SSFFF; R3-SSSSF and R4 -SSSSS. They were housed in floor pens (10 birds/m2) on rice husk litter in the open housing system. Lighting was 16 h of light and 8 h of darkness. There were no significant differences of two strains in terms of body weight, and weight gain, but differences on feed intake and FCR. The study also found that today's broilers showed the best performance when feeding all starter diets from post-hatch until 5 wks of age as a standard marketing age. The groups with more starter diets showed improve growth performance and FCR. Breast meat yield was significantly higher in birds fed all starter diets than those fed the other diets, whereas birds fed finisher diets had significantly more abdominal fat than those fed the starter diets.No effect of strains and feeding regimens on thigh records. No interaction between strains and feeding strategies except abdominal fat.

show abstract

Genetic influences on growth and partition of fat between depots and its distribution in fowl carcasses

Abstract: Summary -Thirty-two Hubbard and 40 Egyptian Fayoumi (dual-purpose) chickens were slaughtered in series at 2-wk intervals between 2-8 wk and 2-10 wk of age, respectively.

Cited by 5 publications

References 9 publications

Effects of breed, sex and diet and their interactions on carcass composition and tissue weight distribution of broiler chickens

Effects of breed, sex and diet and their interactions on carcass composition and tissue weight distribution of broiler chickens

In vivo prediction of internal fat weight in Scottish Blackface lambs, using computer tomography

Response of Two Strains of Commercial Broilers to Variation in Feeding Strategies: Re-test Feeding Practices of Broiler Farming

Contact Info

Product

Resources

About