Identification of Trait Loci Affecting White Meat Percentage and Other Growth and Carcass Traits in Commercial Broiler Chickens

McElroy, Joseph P.; Kim, J.-J.; Harry, David E.; Brown, S. R.; Dekkers, Jack C. M.; Lamont, Susan J.

doi:10.1093/ps/85.4.593

Cited by 58 publications

(61 citation statements)

References 50 publications

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“…The flanking markers associated with the region of this QTL included MCW0183, ADL0180 and ADL0109. In this genomic region, 4 significant and 1 suggestive QTL for AFW were previously identified using differently independent resource populations (Ikeobi et al, 2002;McElroy et al, 2006;Park et al, 2006;Atzmon et al, 2008), which was consistent with our results.…”

Section: Qtl Analysis For Abdominal Fat Traitssupporting

confidence: 91%

“…The flanking markers of this QTL were MCW0103 and GCT0019. This region was contained in the QTL region flanked by MCW0277 and MCW0207 reported by McElroy et al (2006), who identified a QTL affecting AFP that could explain 4.45% of the phenotypic variance in an F 2 cross between 2 commercial broiler lines. Two QTL for AFW and AFP with positive additive effects were identified at 88 and 85 cM on this chromosome.…”

Section: Qtl Analysis For Abdominal Fat Traitsmentioning

confidence: 97%

“…In this region, many QTL for AFW were identified. McElroy et al (2006) mapped a QTL for AFW flanked by MCW0193 and ADL0292, which was located in the similar genomic region. Marker MCW0193 locating in this region was significantly associated with AFW (Atzmon et al, 2008).…”

Section: Qtl Analysis For Abdominal Fat Traitsmentioning

confidence: 99%

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Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7

Wang¹,

Hu²,

Wang³

et al. 2012

Genet. Mol. Res.

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ABSTRACT. Body weight and abdominal fat traits in meat-type chickens are complex and economically important factors. Our objective was to identify quantitative trait loci (QTL) responsible for body weight and abdominal fat traits in broiler chickens. The Northeast Agricultural University Resource Population (NEAURP) is a cross between broiler sires and Baier layer dams. We measured body weight and abdominal fat traits in the F 2 population. A total of 362 F 2 individuals derived from four F 1 families and their parents and F 0 birds were genotyped using 29 fluorescent microsatellite markers located on chromosomes 3, 5 and 7. Linkage maps for the three chromosomes were constructed and interval mapping was performed to identify putative QTLs. Nine QTL for body weight were identified at the 5% genome-wide level, while 15 QTL were identified at the 5% chromosome-wide level. Phenotypic variance explained by these QTL varied from 2.95 to 6.03%. In particular, a QTL region spanning 31 cM, associated with body weight at 1 to 12 weeks of age and carcass weight at 12 weeks of age, was first identified on QTL for body weight and abdominal fat traits chromosome 5. Three QTLs for the abdominal fat traits were identified at the 5% chromosome-wide level. These QTLs explained 3.42 to 3.59% of the phenotypic variance. This information will help direct prospective fine mapping studies and can facilitate the identification of underlying genes and causal mutations for body weight and abdominal fat traits.

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Section: Qtl Analysis For Abdominal Fat Traitssupporting

confidence: 91%

Section: Qtl Analysis For Abdominal Fat Traitsmentioning

confidence: 97%

See 1 more Smart Citation

Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7

Wang¹,

Hu²,

Wang³

et al. 2012

Genet. Mol. Res.

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“…Therefore, genetic studies have been performed to map genes and genomic loci that affect growth, body composition (MCELROY et al 2006, CAMPOS et al 2009, and reproduction traits (TUISKULA-HAAVISTO et al 2002, SASAKI et al 2004, HANSEN et al 2005, SCHREIWEIS et al 2006. If inbred lines of diverse selection lines are used for gene mapping experiments, the probability is very high that different alleles contributing to different traits segregate in the mapping population, and thus these genetic differences can be identified.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic characterization of chicken inbred lines that differ extremely in growth, body composition and egg production traits

et al. 2010

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The development of phenotypically and genetically divergent inbred chicken lines as simplified genetic models facilitates the identification of genes and contributes to the elucidation of gene functions. In this study, we characterized a New Hampshire (NH) population with its partial inbred derivative, New Hampshire inbred (NHI), and a White Leghorn inbred line (WL77). Both NHI and WL77 lines were inbred after selection for high meat yield or low egg weight, respectively. The inbreeding levels in NHI and WL77 are about 86 % and 100 %, respectively. Animals of the NHI line grew twice as fast, were about two times as heavy at 20 weeks, and deposited 9.3 times as much fat as WL77. NHI females reached sexual maturity, indicated by age at first egg, earlier, had a 35 % higher egg production ratio, and their eggs were on average 6 g heavier compared to WL77 females. The NHI and WL77 lines were extremely different for most traits, which makes them suitable for cross-bred experiments to map quantitative trait loci and identify genes contributing to the observed differences.

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“…Also there is significant positive regression coefficient between live body weight and body measurements in chickens (Olawumi, 2013). McElory et al (2006) reported that breast meat is the most economically valuable part of a broiler chicken. Increasing breast meat percentage makes a broiler, gram for gram, a more valuable animal.…”

Section: Introductionmentioning

confidence: 99%

Effect of Selection for High Live Body Weight on Slaughter Performance of Broiler Breeders

2014

EPSJ

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ABSTRACT:The performance of the Cairo B-2 line was evaluated after eight generations of selection for increasing six week live body weight (LBW) compared with a Random Bred Control (RBC) line. Three thousand chicks, from the ninth generation, from both lines were raised in the same house until 6 weeks of age. Water and feed were provided ad libitum. Light was provided 24 hours per day. LBW at 0, 2, 4, and 6 weeks of age were determined for the Cairo B-2 and RBC lines. At 6 week of age 30 males and 30 females from each line were slaughtered to determined carcass characteristics. Our results indicated that, Cairo B-2 line weighed 35% more than the RBC in the ninth generation. The difference in LBW between the Cairo B-2 and RBC lines was 396 g at 6 weeks of age. In addition, the Cairo B-2 line had significantly higher carcass, breast meat, leg meat, abdominal fat weight and percentages than the RBC line. However, the RBC line had significantly higher wings with bones percentages than the Cairo B-2 line. Also, Cairo B-2 line had significantly longer shanks and keels than the RBC line. On the other hand, the RBC line had significantly higher edible giblets percentages than Cairo the B-2 line. It was concluded that, selection for increasing 6-week LBW, in chicken, caused concurrent increases in carcass parts percentages and decreases in edible giblets percentages. Also, continuous selection for increasing 6-week LBW, in Cairo B-2 line, caused improvement in its performance from one generation to the next.

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Identification of Trait Loci Affecting White Meat Percentage and Other Growth and Carcass Traits in Commercial Broiler Chickens

Cited by 58 publications

References 50 publications

Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7

Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7

Phenotypic characterization of chicken inbred lines that differ extremely in growth, body composition and egg production traits

Effect of Selection for High Live Body Weight on Slaughter Performance of Broiler Breeders

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