Body weight

Genome-wide association study of growth traits in the Jinghai Yellow chicken

G. X. Zhang, Fan, Q. C., Zhang, T., Wang, J. Y., Wang, W. H., Xue, Q., and Wang, Y. J., Genome-wide association study of growth traits in the Jinghai Yellow chicken, vol. 14, pp. 15331-15338, 2015.

Growth is one of the most economically important traits in the poultry industry. In this study, we identified single-nucleotide polymorphisms (SNPs) and candidate genes associated with growth traits of the Jinghai Yellow chicken. Genome-wide association studies were conducted using the Illumina 60 K SNP Chicken array to genotype 400 Jinghai Yellow chickens. For each bird, the body weights at hatching and at 2, 4, 6, 8, 12, 14, and 16 weeks were recorded. The SNPs that were significantly associated with the growth traits were identified using the general linear regression model.

Genetic and phenotypic parameters of carcass and organ traits of broiler chickens

G. C. Venturini, Cruz, V. A. R., Rosa, J. O., Baldi, F., L. Faro, E., Ledur, M. C., Peixoto, J. O., and Munari, D. P., Genetic and phenotypic parameters of carcass and organ traits of broiler chickens, vol. 13, pp. 10294-10300, 2014.

The objective of this study was to estimate the genetic and environmental parameters for carcass, carcass part, and organ weights in a paternal strain of broiler chickens that was selected mainly for body weight at 42 days of age (BW42) to provide support for poultry genetic improvement programs. A total of 1448 chickens were used that resulted from the expansion of a pure paternal strain named TT, which was developed by Embrapa Suínos e Aves.

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

S. Z. Wang, Hu, X. X., Wang, Z. P., Li, X. C., Wang, Q. G., Wang, Y. X., Tang, Z. Q., and Li, H., Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7, vol. 11, pp. 956-965, 2012.

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 F2 population.

Impacts of single nucleotide polymorphisms and haplotypes in the bovine Dapper1 gene on body weight

J. Wang, Wang, C., Gao, Y., Lan, X. - Y., Lei, C. - Z., Wang, J. - Q., and Chen, H., Impacts of single nucleotide polymorphisms and haplotypes in the bovine Dapper1 gene on body weight, vol. 12, pp. 1254-1268, 2013.

The Dapper1 protein plays important role in multiple developmental processes via negative modulation of the Wnt signaling pathway. We detected variations in Dapper1 in 1185 individuals from 5 Chinese cattle breeds and determined their effects on bovine body weight. Two silent mutations (g.8344C>T and g.8428C>T) in exon 6 along with two substitutions (g.10513A>G and g.10765C>G) in the 3'-untranslated region were detected with DNA pool sequencing and forced polymerase chain reaction-restriction fragment length polymorphism.

Genetic evaluation using multi-trait and random regression models in Simmental beef cattle

R. R. Mota, Marques, L. F. A., Lopes, P. S., da Silva, L. P., Neto, F. R. A., de Resende, M. D. V., and Torres, R. A., Genetic evaluation using multi-trait and random regression models in Simmental beef cattle, vol. 12, pp. 2465-2480, 2013.

The Brazilian Association of Simmental and Simbrasil Cattle Farmers provided 29,510 records from 10,659 Simmental beef cattle; these were used to estimate (co)variance components and genetic parameters for weights in the growth trajectory, based on multi-trait (MTM) and random regression models (RRM). The (co)variance components and genetic parameters were estimated by restricted maximum likelihood. In the MTM analysis, the likelihood ratio test was used to determine the significance of random effects included in the model and to define the most appropriate model.

Experimental evaluation of the reproductive quality of Africanized queen bees (Apis mellifera) on the basis of body weight at emergence

D. A. De Souza, Bezzera-Laure, M. A. F., Francoy, T. M., and Gonçalves, L. S., Experimental evaluation of the reproductive quality of Africanized queen bees (Apis mellifera) on the basis of body weight at emergence, vol. 12, pp. 5382-5391, 2013.

There has been much speculation about which phenotypic traits serve as reliable indicators of productivity in queen honeybees (Apis mellifera). To investigate the predictive value of queen body weight on colony development and quality, we compared colonies in which queens weighed less than 180 mg to those in which queens weighed more than 200 mg. Both groups contained naturally mated and instrumentally inseminated queens. Colonies were evaluated on the basis of performance quality, growth rate, and queen longevity.

Influence of animals obtained using embryo transfer on the genetic evaluation of growth in Simmental beef cattle with random regression models

R. R. Mota, Lopes, P. S., Marques, L. F. A., Silva, L. P., M. Pessoa, C., R. Torres, A., and Resende, M. D. V., Influence of animals obtained using embryo transfer on the genetic evaluation of growth in Simmental beef cattle with random regression models, vol. 12, pp. 5889-5904, 2013.

Weight records of Simmental beef cattle were used in a genetic evaluation of growth with and without embryo transfer (ET). A random regression model in which ET individuals were excluded (RRM1) contained 29,510 records from 10,659 animals, while another model that did not exclude these animals (RRM2) contained 62,895 records from 23,160 animals. The fixed and random regressions were represented by continuous functions, and a model with an order of three for the fixed curve and random effects was used to consider the homogeneity of residual variance.

Subscribe to Body weight