Inheritance of hatchability in broiler chickens and its relationship to egg quality traits

Wolc, Anna; White, Ian; Hill, William G.; Olori, V E

doi:10.3382/ps.2009-00614

Cited by 39 publications

(26 citation statements)

References 18 publications

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“…This defect was most frequent at the beginning of lay and, as expected, was negatively correlated with age at first egg, egg weight, yolk weight, and puncture score. Egg weight itself was highly heritable (h 2 = 0.74), which confirms previous studies, for which estimates of heritability for egg weight ranged from 0.48 to 0.64 (Hartmann et al, 2003;Zhang et al, 2005;Kamali et al, 2007;Wolc et al, 2010). Egg weight was positively correlated with BW and with the egg components yolk weight and albumen height.…”

Section: Egg Weightsupporting

confidence: 87%

Genetic parameters of egg defects and egg quality in layer chickens

et al. 2012

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Genetic parameters were estimated for egg defects, egg production, and egg quality traits. Eggs from 11,738 purebred brown-egg laying hens were classified as salable or as having one of the following defects: bloody, broken, calcium deposit, dirty, double yolk, misshapen, pee-wee, shell-less, and soft shelled. Egg quality included albumen height, egg weight, yolk weight, and puncture score. Body weight, age at sexual maturity, and egg production were also recorded. Heritability estimates of liability to defects using a threshold animal model were less than 0.1 for bloody and dirty; between 0.1 and 0.2 for pee-wee, broken, misshapen, soft shelled, and shell-less; and above 0.2 for calcium deposit and double yolk. Quality and production traits were more heritable, with estimates ranging from 0.29 (puncture score) to 0.74 (egg weight). High-producing hens had a lower frequency of egg defects. High egg weight and BW were associated with an increased frequency of double yolks, and to a lesser extent, with more shell quality defects. Estimates of genetic correlations among defect traits that were related to shell quality were positive and moderate to strong (0.24-0.73), suggesting that these could be grouped into one category or selection could be based on the trait with the highest heritability or that is easiest to measure. Selection against defective eggs would be more efficient by including egg defect traits in the selection criterion, along with egg production rate of salable eggs and egg quality traits.

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Section: Egg Weightsupporting

confidence: 87%

Genetic parameters of egg defects and egg quality in layer chickens

et al. 2012

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“…The negative effect of low eggshell quality on hatchability has been reported in several studies (Narushin & Romanov, 2002;Barnett et al, 2004;Wolc et al, 2010). The reduction in hatchability of Balady eggs exposed to ULT15 was associated with a significant increase in early-dead embryos and a non-significant increase in late-dead embryos (Trial 1).…”

Section: Resultsmentioning

confidence: 84%

Effects of ultrasonic waves on eggshell strength and hatchability of layer-type breeder eggs

Shafey¹,

Hussein²,

Al-Batshan³

2013

SA J. An. Sci.

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________________________________________________________________________________ AbstractTwo trials were conducted to investigate the effects of exposing layer-type breeder eggs before incubation to ultrasonic waves (ULT). Eggs were subjected to ULT of 117 volts at 40 kHz for up to 15 minutes. Eggshell breaking force (EBF), hatchability and chick hatching weight (CHW) of Balady breeder eggs (Trial 1), and egg weight loss, embryo weight, hatchability and CHW of Leghorn hen eggs (Trial 2) were measured. In Trial 1 the eggs were subjected to seven treatments: non-dipped (control), and dipped for 5, 10 and 15 minutes in a water bath (W5, W10 and W15) or a ULT bath (ULT5, ULT10 and ULT15). In Trial 2 the eggs were subjected to four treatments, a control (ULT0) and the ultrasonic treatments, ULT5, ULT10 and ULT15. In treatments ULT10 and ULT15 the EBF of Balady eggs was significantly reduced while the hatchability of the Balady and Leghorn eggs was significantly reduced by the ULT15 and W15 treatments, compared with the control. Orthogonal contrast (control vs. ULT) indicated that ULT exposure of eggs reduced their EBF significantly. Percentage egg weight loss, embryo weight and CHW was not affected by the treatments. It was concluded that exposure of eggs to ULT of 117 volts at 40 kHz for 15 minutes reduced EBF and hatchability of layer-type breeder eggs without altering egg weight loss, embryo weight or CHW.________________________________________________________________________________

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“…; Wolc et al . ). In the Zatorska goose hatchability from the fertilized egg was 53.72% (ranging between 20–80% depending on year) which is very similar to the result of waterfowl presented in the literature.…”

Section: Discussionmentioning

confidence: 97%

Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

Graczyk

Andres²,

Kapkowska³

et al. 2018

Animal Science Journal

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The aim of this study was to estimate the genetic parameters and inbreeding effect on the fertility, embryo mortality and hatchability traits in the Zatorska goose covered by the animal genetic resources conservation program. The material for this study contains information about results of hatching of 18 863 eggs from 721 dams and 168 sires, laid between 1998-2015. Genetic parameters were estimated based on the threshold animal model by the use of Restricted Maximum Likelihood and Gibbs sampling. The percentage of fertilized eggs ranged yearly between 37-80%. The percentage of embryo mortality was very low, ranging between 4.63-23.73%. The percentage of the hatched goslings from the total number of analyzed eggs was on average 33.18%, and 53.72% from fertilized eggs. On average based on both methods, the heritability estimates of the fertility, embryo mortality and hatchability reached 0.36, 0.07, 0.24 for males and 0.44, 0.11, 0.32 for females. The genetic trend had increasing tendency for fertility and hatchability and was stable for embryo mortality for both sexes. The obtained result shows that the Zatorska goose can be still maintained in the reserves of the local gene pool according to current rules and use in the local market as a breed with good reproductive potential.

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Inheritance of hatchability in broiler chickens and its relationship to egg quality traits

Cited by 39 publications

References 18 publications

Genetic parameters of egg defects and egg quality in layer chickens

Genetic parameters of egg defects and egg quality in layer chickens

Effects of ultrasonic waves on eggshell strength and hatchability of layer-type breeder eggs

Genetic evaluation of reproductive potential in the Zatorska goose under a conservation program

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