Investigation of possible genetic background of early embryonic mortality in poultry

Liptói, Krisztina; Hidas, A.

doi:10.1079/wps2005101

Cited by 25 publications

(17 citation statements)

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“…Several environmental effects are known to affect hatchability, such as storage length and conditions, age of dam, and quality of the egg (Heier and Jarp, 2001). It is also significantly influenced by genetic factors acting directly or indirectly through the egg (Meijerhoff, 1992;Liptói and Hidas, 2006).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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The first objective of this study on broiler breeders was to investigate the genetic basis of variability in hatchability over age using a longitudinal model. Weekly percentage hatch of fertile and hatch of set eggs were available for 23,250 dams mated to 3,106 sires of the same age between the 28th and 54th week of life. Hatch of set was very highly correlated with fertility and showed a similar pattern through lay. There was a genetic contribution of the dam but not the sire to hatch of fertile; its heritability was about 6% from peak lay onward but lower earlier. The second objective was to investigate the relationship between hatchability and internal and external egg quality traits measured at 48 wk of age. These traits, specific gravity, weight loss, egg weight, and Haugh units, had moderate to high heritabilities, 0.53, 0.38, 0.65, and 0.38, respectively. Parameters of the genetic trend in weekly hatchability (mean and persistency) were significantly correlated with these egg quality traits, suggesting that in a bulk mating situation in which individual recording of hatchability is not possible, these quality traits could provide some indication on the trend in flock hatchability.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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“…La ME temprana (MET) sucede en la primera semana de incubación (3). Se observa que es especialmente alta entre el día 3 y 5 y se presume que ocurre a causa del cambio en la eliminación del CO 2 , o por hidronefrosis (1) que resulta de una obstrucción mecánica del mesonefros, cuando este órgano comienza a funcionar (3).…”

Section: Introductionunclassified

“…The early EM (EEM) happens during the first week of incubation (3). It is especially high between day 3 and 5.…”

Section: Introductionmentioning

confidence: 99%

“…Late EM (LEM) occurs during the third week of incubation and raises toward the 19 th day (1), when the embryonic oxygen requirements are highest (3). It may be caused by a failure in the transition from allantoic to pulmonary respiration.…”

Section: Introductionmentioning

confidence: 99%

“…It is especially high between day 3 and 5. Presumably, it is due to CO 2, accumulation or to hydronephrosis (1); the latter, as a result of mechanical obstruction when the mesonephros starts working (3). Romanoff, in 1949, mentioned some other posible causes for EEM such as respiratory maladjustments before the establishment of special respiratory surfaces (area vasculosa and chorioallantois) that appear during the first three or four days of incubation.…”

Section: Introductionmentioning

confidence: 99%

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Caracterización de mortalidad embrionaria en pollos de engorde

Hernández

2018

Rev MVZ Córdoba

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Objective. The purpose of this study was to characterize the incidence of EM in Ross 308 strain eggs. Materials and methods. A prospective cohort study was performed, through candling and embryodiagnosis, in 4 groups of eggs coming from 4 different age breeders. Other data such as percentage of infertility, malformation, malposition, cracked and contaminated eggs were reported. Results. General EM reached 16.08% IC95% (14.69; 17.60) and was different among the different age-groups (p<0.001), being higher for eggs from 64 week-old breeders with 27.66% IC95%(23.92; 31.99) and lower for the 47 weeks old ones (8.84% IC95%) (6.97; 11.22). In the first week of incubation 57.53% of the embryos died and mortality was at its highiest during days 1 and 3; in the second week EM was 38.42% died, with a maximum of deaths between days 19 and 21. Conclusions. This study allowed confirmation on the biphasic behaviour of EM, although there are variations in the peaks of mortality possibly attributed to differences in production conditions for each enterprise.Keywords: Flocks, incubation, embryo mortality (Sources: AGROVOC, ICYT). RESUMENObjetivo. El propósito de este estudio fue caracterizar la incidencia de mortalidad embrionaria (ME) en huevos de estirpes Ross 308 en una empresa de Santander, Colombia. Materiales y métodos. Se realizó un estudio de cohorte prospectivo en el cual se siguieron durante la incubación, por medio de ovoscopía y embriodiagnóstico, 4 grupos de huevos provenientes de reproductoras de 4 edades diferentes. Se reporta el porcentaje de infertilidad, de malformaciones, malposición, huevos fisurados y contaminados. Resultados. La ME general alcanzó 16.08% IC95%(14.69; 17.60) y fue diferente entre los grupos de edad (p<0.001); esta fue mayor para los huevos de reproductoras de 64 semanas con 27.66% IC95% (23.92; 31.99) y menor para las de 47 semanas con 8.84% IC95% (6.97; 11.22). En la primera semana de incubación murió el 57.53% de los embriones y se presentó el pico de muerte entre los días 1 y 3; la segunda semana murió el 38.42%, con un máximo de muertes entre el día 19 y 21. Conclusiones. Este estudio, es el primero de su naturaleza para la zona y la estirpe y permitió confirmar el comportamiento bifásico de la ME aunque existen variaciones en los picos de mortalidad atribuidas posiblemente a las diferencias de las condiciones de producción propias de las empresas. INTRODUCCIÓNLa ME es un problema de gran importancia económica en la industria avícola. A principios del siglo XX, cuando los lotes eran pequeños no superaba el 10%; sin embargo, hacia 1950 cuando los métodos primitivos de manejo de las aves fueron sustituidos por modernas prácticas de producción intensiva, reproducción en confinamiento e incubación artificial a gran escala, la ME frecuentemente alcanzaba el 25% o más (1). Actualmente, el desarrollo de líneas especializadas, su selección hacia parámetros ideales de producción y el desarrollo tecnológico de las incubadoras, ha permitido establecer límites para cada estirpe, bajo los cu...

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Incubation and Hatching of Duck Eggs

Cyriac

Joseph

2022

Duck Production and Management Strategies

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Investigation of possible genetic background of early embryonic mortality in poultry

Cited by 25 publications

References 65 publications

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

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

Caracterización de mortalidad embrionaria en pollos de engorde

Incubation and Hatching of Duck Eggs

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