Breeder age and bone development in broiler chicken embryos

Alfonso-Torres, K. A.; Gargaglioni, Luciane H.; Pizauro, João Martins; Filho, D. E. Faria; Furlan, Renato Luís; Macari, Marcos

doi:10.1590/s0102-09352009000100031

Cited by 11 publications

(10 citation statements)

References 16 publications

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“…Genotype and embryonic age interaction was not statistically significant for those bone parameters. Alfonso- Torres et al (2009) showed that there weren't found any significant interaction between incubation day and breeder age on weight and length of femur. They also reported that weight and width of bones in broiler embryos were affected by breeder age.…”

Section: Discussionmentioning

confidence: 95%

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Femur Properties of Embryo in the Layer Hybrid and Pure Breeds

Onbaşılar

Güngör

Demir

et al. 2018

Braz. J. Poult. Sci.

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Layer hybrids are more superior in the egg yield than pure breeds. But this superiority causes some problems in the bones during the production period. There are a lot of differences among genotypes in the production period that have been examined extensively, however, the differences throughout incubation period aren't known yet. Thus, the objective of this study was to evaluate the differences in femur properties of pure breed and layer hybrid embryos during the incubation period. A total of 354 fresh hatching eggs were used from one hybrid (Lohman White) and two pure breeds (Denizli & Gerze). The eggs were incubated. Hatching eggs from each genotype at the beginning of embryonic days (E) 19 and E21 were examined. At these embryonic ages, 12 eggs were selected from each genotype. The eggs were opened and embryos were sacrificed by cervical dislocation. Both femurs were dissected from each embryo and then structure, mineral composition and mechanical properties of femur were determined. The genotype affected the length, width and Zn level in the femur of embryos. Weight, length, width, load of yield and ultimate, ash and all examined minerals increased with embryonic development. These results showed that some femur properties of embryos were influenced by the genotype and layer hybrid embryos are beginning to be advantageous in terms of Zn level in the femur at E21. This study leads to better understanding femur development during the incubation period in layer hybrid and pure breeds.

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Section: Discussionmentioning

confidence: 95%

“…The bones were weighed. Femur length was measured from the Trochanter major to Condylus lateralis and the width at the medial diaphysis (Alfanso- Torres et al, 2009). And they were stored at -20 ºC for further analyses.…”

Section: Methodsmentioning

confidence: 99%

Femur Properties of Embryo in the Layer Hybrid and Pure Breeds

Onbaşılar

Güngör

Demir

et al. 2018

Braz. J. Poult. Sci.

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“…While our results deviate from those of the aforementioned ex ovo and ex vivo measurements, there were also discrepancies among those studies. For example, for d15 we measured a mean femur length of 8.574 mm, Alfonso-Torres et al [28] reported a length of 14.51 mm (by polynomial regression), and Hammond et. al reported a length of 11.25 mm (Figure 4(b) in [31]).…”

Section: Discussionmentioning

confidence: 99%

“…al reported a length of 11.25 mm (Figure 4(b) in [31]). In addition to human bias, these apparent differences may arise from variations in breeder age [28] and incubation temperature [31] as well as bone shrinkage resulting from fixation or preparation [33]. Our methodology imposes additional constraints that should be considered when comparing our measured lengths to those of classical studies.…”

Section: Discussionmentioning

confidence: 99%

Automated Segmentation and Object Classification of CT Images: Application toIn VivoMolecular Imaging of Avian Embryos

Heidrich

Schmidt

Zimmermann³

et al. 2013

International Journal of Biomedical Imaging

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Background. Although chick embryogenesis has been studied extensively, there has been growing interest in the investigation of skeletogenesis. In addition to improved poultry health and minimized economic loss, a greater understanding of skeletal abnormalities can also have implications for human medicine. True in vivo studies require noninvasive imaging techniques such as high-resolution microCT. However, the manual analysis of acquired images is both time consuming and subjective. Methods. We have developed a system for automated image segmentation that entails object-based image analysis followed by the classification of the extracted image objects. For image segmentation, a rule set was developed using Definiens image analysis software. The classification engine was implemented using the WEKA machine learning tool. Results. Our system reduces analysis time and observer bias while maintaining high accuracy. Applying the system to the quantification of long bone growth has allowed us to present the first true in ovo data for bone length growth recorded in the same chick embryos. Conclusions. The procedures developed represent an innovative approach for the automated segmentation, classification, quantification, and visualization of microCT images. MicroCT offers the possibility of performing longitudinal studies and thereby provides unique insights into the morpho- and embryogenesis of live chick embryos.

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“…The weights of eggs and, accordingly, the weights of the chicks obtained increase with an increase in the breeder age (Şahan et al, 2014;İpek and Sözcü, 2015). Higher mortality (Wyatt et al, 1985) and lower yolk nutrients (Şahan et al, 2014) are observed in the eggs obtained from young breeders, whereas the bone width is higher in the embryos obtained from old hens (Alfonso- Torres et al, 2009). Shanawany (1987) and Peebles et al (1999a) put forward that the increase in the hatching weights of the chicks depending on the breeder age significantly increased the weights on the following weeks.…”

Section: Introductionmentioning

confidence: 99%

Effects of Breeder Age on Genetic Parameter Estimates of Slaughter and Carcass Traits in Japanese Quail

Gürcan

Narinç

Kaplan

2018

int.jour.sci.res.mana.

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This study aimed to determine the phenotypic values of the slaughter and carcass traits in the flocks of quails obtained when a flock of parent quails were at 12, 16, and 20 weeks of age and to estimate the heritabilities and the genetic correlations for these traits. For this purpose, a total of 1,346 Japanese quails were slaughtered at 8 weeks of age, and their slaughter weights as well as carcass, breast, leg, and abdominal fat weights and ratios were determined. Differences in all traits were detected between female and male quails (P<0.05). The averages of many important traits, primarily slaughter weight, carcass weight, and breast weight, increased with the increase in the breeder age. On the contrary, the carcass yield decreased (P<0.05). There were no significant variations in the phenotypic and genetic variances for the slaughter and carcass traits in the flocks obtained when the breeder flock was at different ages. The heritabilities for slaughter weight, carcass weight, and abdominal fat weight were estimated to be moderate, and the genetic correlations among them were estimated to be positive and high. In conclusion, it is possible to state that positive results might be obtained by using the carcass ratio as the criterion for selection in quails. Besides, the breeder age was discovered to have had no significant effect on the genetic parameter estimations.

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Breeder age and bone development in broiler chicken embryos

Cited by 11 publications

References 16 publications

Femur Properties of Embryo in the Layer Hybrid and Pure Breeds

Femur Properties of Embryo in the Layer Hybrid and Pure Breeds

Automated Segmentation and Object Classification of CT Images: Application toIn VivoMolecular Imaging of Avian Embryos

Effects of Breeder Age on Genetic Parameter Estimates of Slaughter and Carcass Traits in Japanese Quail

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