Embryonic development from first cleavage through seventy-two hours incubation in two strains of pekin duck (Anas platyrhynchos)

Dupuy, V.; Nersessian, Bedros N.; Bakst, M. R.

doi:10.1093/ps/81.6.860

Cited by 26 publications

(18 citation statements)

References 11 publications

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“…Eggs showing no normal embryonic development (infertile, dead) at candling on the 7th day of incubation were cracked. Samples were compared with the categories of Eyal-Giladi and Kochav (1976) and Dupuy et al (2002). Germinal discs appearing to be infertile were stained with PI and the number of OPVL spermatozoa was determined by the same methods as in the first experiment.…”

Section: Experiments IImentioning

confidence: 99%

“…from fertilisation through oviposition. Later, Dupuy et al (2002) established the normal sequence of embryonic development in the duck embryo for the same period. Primary or 'true' fertility can be assessed more easily, but not completely reliably in fresh, unincubated eggs by distinguishing the regular spherical appearance of the fertile blastoderm from the amorphous condensed knot of opaque material and surrounding crater-like lacunae, which represent the degenerating germinal disc (blastodisc) of the unfertilised egg (Kosin, 1945).…”

mentioning

confidence: 99%

“…Among the eggs in which an infertile germinal disc is seen by visual inspection, fertile ones can be found by examination under the dissecting microscope. These embryonic deaths can occur before oviposition, in stages I-VI according to Eyal-Giladi and Kochav (1976) and in stage 1-6 according to Dupuy et al (2002). At candling on the 7th day or earlier, it is difficult to distinguish with certainty infertile eggs from fertile eggs containing an embryo that died early (Jassim et al, 1996).…”

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confidence: 99%

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Determination of the rate of true fertility in duck breeds by the combination of two in vitro methods

Liptói

Varga

Hidas

et al. 2004

Acta Veterinaria Hungarica

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Embryonic mortality is a significant problem plaguing the hatching success. Its early forms are especially hardly distinguishable from true infertility. Propidium iodide (PI) staining of the germinal disc combined with outer perivitelline layer (OPVL) sperm counting was used for the determination of 'true' fertility of duck eggs in two different experiments: fertility investigation on fresh, unincubated eggs of Hungarian ducks and on incubated eggs of a crossbred, selected as 'infertile' at the 7th day of incubation. Examination of the relationship between OPVL sperm count and fertility seems to be an adequate tool for checking the effectiveness of insemination programmes and the fertilising capacity of poultry spermatozoa. The proportion of fertile eggs was around 50% when the number of OPVL sperm was between 0.1 and 0.2 spermatozoa/mm 2 . Ninety-nine percent of the eggs containing > 0.3 OPVL sperm/mm 2 were fertile and all of the eggs containing < 0.05 sperm/mm 2 were infertile. To assure the accuracy of fertility prediction by OPVL sperm counting, PI staining of the germinal disc was used to determine fertility in uncertain cases. Identification of very early embryonic mortality, i.e. that occurring before oviposition, is very difficult. The use of a dissecting microscope for the assessment of real fertility is suitable in most of the cases, while PI staining of the germinal discs proved to be more reliable for detecting very early embryonic death. The combination of the two methods proved to be a useful tool for detecting the 'true' fertility of duck eggs of different breeds.

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Section: Experiments IImentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Determination of the rate of true fertility in duck breeds by the combination of two in vitro methods

Liptói

Varga

Hidas

et al. 2004

Acta Veterinaria Hungarica

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“…Similar staging procedures have been described for turkey (Gupta and Bakst, 1993) and Pekin duck (Dupuy et al, 2002). Development in the Pekin duck embryo is divided into a cleavage phase, in which cell division occurs regularly (stages EGK I-VI), and the area pellucida formation phase, during which thinning in the central zone of the blastoderm occurs as a consequence of cell shedding (EGK stages VII-IX).…”

Section: Introductionmentioning

confidence: 99%

“…Early embryonic mortality is a major problem plaguing the poultry industry (Coleman, 1983;Dupuy, 2002), but its biological basis remains unknown. The normal embryonic developmental sequence in poultry, including ducks, is established by specific stages of morphogenetic progression during the preoviposition and incubation periods (Eyal-Giladi and Kochav, 1976;Gupta and Bakst, 1993;Bakst et al, 1997;Sellier et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Construction and analysis of a subtractive cDNA library of early embryonic development in duck

Liu

Zhong²,

Li³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Several studies have documented the process of early embryonic development in poultry; however, the molecular mechanisms underlying its developmental regulation are poorly understood, particularly in ducks. In this study, we analyzed differential gene expression of embryos 6 and 25 h following oviposition to determine which genes regulate the early developmental stage in ducks. Among 216 randomly selected clones, 39 protein-encoding cDNAs that function in metabolism, transcription, transportation, proliferation/apoptosis, cell cycle, cell adhesion, and methylation were identified. Additionally, the full-length cDNA of the Nanog gene, encoding a 302-amino acid protein, was obtained. Quantitative real-time polymerase chain reaction analyses were performed to detect expression levels of the selected genes during early and late embryonic stages, which revealed that these genes are expressed in a particular spatial and temporal pattern. These results indicate that these genes may play pivotal roles in the process Construction and analysis of a cDNA library in duck of area pellucida formation through a complex and precise regulatory network during development in duck embryos.

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Development of the Superaltricial Monk Parakeet (Aves, Psittaciformes): Embryo Staging, Growth, and Heterochronies

Carril

Tambussi

2015

The Anatomical Record

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Knowledge about the embryonic stages of birds is important in answering many questions about development and evolution. We give the first description of 41 embryological stages of the monk parakeet (Myiopsitta monachus) on the basis of external morphology and comparison with the chicken. We also provide measurements of some external morphological characters (i.e. body mass, crown-rump, beak, forelimb, and third toe lengths) and perform comparisons with other precocial and altricial birds with the aim of identifying heterochronous developmental features. The following differences in the development of characters in the monk parakeet when compared with other birds were found: (1) delay of the feathers primordia, (2) wing buds initially greater than leg buds, (3) forelimbs and hindlimbs with similar relative size, (4) retroversion of the toe IV, (5) ventral curvature of the upper jaw, (6) positive regressions between stages and beak length with acceleration and higher values and III toe lengths with deceleration and lower values in the monk parakeet compared to the chicken. The growth pattern of the monk paraket Myiopsitta monachus could be influenced by some heterochronic processes like postdisplacement, acceleration and/or deceleration. Results of this research allow the standard identification of stages in different species of parrots, recognize similarities and differences between precocial (the chicken) and altricial species (Myiopsitta), and provide planning data for future studies.

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Embryonic development from first cleavage through seventy-two hours incubation in two strains of pekin duck (Anas platyrhynchos)

Cited by 26 publications

References 11 publications

Determination of the rate of true fertility in duck breeds by the combination of two in vitro methods

Determination of the rate of true fertility in duck breeds by the combination of two in vitro methods

Construction and analysis of a subtractive cDNA library of early embryonic development in duck

Development of the Superaltricial Monk Parakeet (Aves, Psittaciformes): Embryo Staging, Growth, and Heterochronies

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