Effects of photoperiod during incubation on embryonic and post‐embryonic development of quail and chickens<sup>1</sup>

Walter, Jacques; Voitle, R. A.

doi:10.1080/00071667308416062

Cited by 33 publications

(20 citation statements)

References 7 publications

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“…The data on navel score for these experiments suggest that treatment has no effect on the parameter; however, the fact that there is numerical separation of data due to treatment in experiment 2 coupled with data from previous experiments (Walter and Voitle, 1971;Voitle, 1970) suggests that these latter differences may be real. The fact that the data on navel score from experiment 1 differs from the results obtained in previous experiments can be explained in part by the fact that the electrical power was off in all incubators for a period of 12 hours.…”

Section: Discussionmentioning

confidence: 74%

“…T HE effects of photoperiod during incubation on the embryonic and postembryonic development of egg-type chickens have been reviewed by Walter and Voitle (1971). In addition they reported that, regardless of species, the development of the embryos was accelerated, initial body weight was unaffected and the incidence of healed navels was increased by increasing the length of exposure to light during incubation.…”

Section: Introductionmentioning

confidence: 98%

“…Chicks were navel scored for maturity as suggested by Voitle (1970). This method is based on the fact that before hatching the yolk sac is drawn into the body cavity through the navel (Walter and Voitle, 1971). A scale from one to five was used.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Walter¹,

Voitle²

1972

Poultry Science

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Four experiments were conducted to determine the effect of light during incubation on embryonic and post-embryonic development of broiler chickens. The eggs were randomly assigned to one of three lighting regimes during the incubation period: (a) a diurnal light cycle consisting of a 12-hour light period followed by a 12-hour dark period (12L-12D), (b) 24 hours of light (24L-OD), and (c) 24 hours of darkness (0L-24D) per day.The development of the embryos was accelerated by increasing the length of exposure to light during incubation. There were no significant differences between treatments in initial body weights of those chicks that hatched early and those which required 21 days to hatch. Body weights of the chickens at four and eight weeks post-hatch showed no significant differences between treatment groups. Embryo weights at 12 and 18 days of incubation were heavier when increased amounts of light were provided during incubation. The incidence of healed navels was increased with greater length of exposure to light during incubation.From these data it was hypothesized that the rate of embryonic development, as measured by hours of incubation, navel score, embryo and chick weights, is accelerated by an exposure to light during incubation. There were no deleterious effects of exposure to light during incubation as measured by body weights at hatch, four weeks and eight weeks of age.

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Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 98%

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Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Walter¹,

Voitle²

1972

Poultry Science

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“…Shutze et al (1962) first reported that continuous incandescent treatment during embryogenesis accelerated chick embryo development and shortened incubation time compared with continuous colored light treatment and commercial dark condition. Some other studies also found the similar phenomenon in White Rock chickens (Siegel et al, 1969), Rhode Island Red domestic fowl (Adam and Dimond, 1971), quail and broilers (Walter and Voitle, 1973). However, Lauber (1975) observed that the White Leghorn eggs stimulated with green light or blue-violet light showed a significantly higher embryo weight.…”

Section: Introductionmentioning

confidence: 79%

Stimulation with monochromatic green light during incubation alters satellite cell mitotic activity and gene expression in relation to embryonic and posthatch muscle growth of broiler chickens

Zhang

Wang

et al. 2014

Animal

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Previous studies showed that monochromatic green light stimuli during embryogenesis accelerated posthatch body weight (BW) and pectoral muscle growth of broilers. In this experiment, we further investigated the morphological and molecular basis of this phenomenon. Fertile broiler eggs (Arbor Acres, n = 880) were pre-weighed and randomly assigned to 1 of the 2 incubation treatment groups: (1) dark condition (control group), and (2) monochromatic green light group (560 nm). The monochromatic lighting systems sourced from light-emitting diode lamps and were equalized at the intensity of 15 lx at eggshell level. The dark condition was set as a commercial control from day 1 until hatching. After hatch, 120 male 1-day-old chicks from each group were housed under incandescent white light with an intensity of 30 lx at bird-head level. No effects of light stimuli during embryogenesis on hatching time, hatchability, hatching weight and bird mortality during the feeding trial period were observed in the present study. Compared with the dark condition, the BW, pectoral muscle weight and myofiber cross-sectional areas were significantly greater on 7-day-old chicks incubated under green light. Green light also increased the satellite cell mitotic activity of pectoral muscle on 1-and 3-day-old birds. In addition, green light upregulated MyoD, myogenin and myostatin mRNA expression in late embryos and/ or newly hatched chicks. These data suggest that stimulation with monochromatic green light during incubation promote muscle growth by enhancing proliferation and differentiation of satellite cells in late embryonic and newly hatched stages. Higher expression of myostatin may ultimately help prevent excessive proliferation and differentiation of satellite cells in birds incubated under green light.

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“…Under regular conditions in hatcheries, eggs are incubated in darkness. Early studies indicated that white-light illumination accelerates embryonic development of several avian species (6,7,38,46). Eggs incubated under white light hatched ϳ1 day earlier than those incubated in the dark (7,38,45).…”

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confidence: 99%

In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks

Halevy¹,

Piestun²,

Rozenboim³

et al. 2006

American Journal of Physiology-Regulatory, Integrative and Comp

102

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Our previous studies demonstrated that illumination of chicken embryos with monochromatic green light results in enhanced body and muscle weight at later posthatch stages. In the present study, we investigated the cellular and molecular basis of this phenomenon. First, we showed that on day 6 posthatch, myofibers were more uniform in the in ovo illuminated group than in the control group incubated in the dark, with respect to the number of myofibers displaying diameter values within the range of the mean value. Second, we tested the hypothesis that in ovo illumination causes an increase in the number of myoblasts; this in turn can promote posthatch muscle growth. Indeed, a significant increase in the number of skeletal muscle cells isolated from pectoralis muscle was observed in the in ovo illuminated group on days 1 and 3 posthatch relative to the control group. This increased cell number was accompanied by higher expression levels of Pax7 and myogenin proteins on posthatch days 1 and 3, respectively. A parallel analysis of proliferating cells in the intact muscle further demonstrated a significant increase in the number of cells positive for proliferating cell nuclear antigen in muscle from the in ovo illuminated group. Third, we demonstrated that the transition from fetal- to adult-type myoblasts, normally occurring in late stages of chicken embryogenesis, is initiated earlier in embryos subjected to in ovo green-light illumination. We suggest that the stimulatory effect of in ovo illumination on posthatch muscle growth is the result of enhanced proliferation and differentiation of adult myoblasts and myofiber synchronization.

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Effects of photoperiod during incubation on embryonic and post‐embryonic development of quail and chickens¹

Cited by 33 publications

References 7 publications

Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Stimulation with monochromatic green light during incubation alters satellite cell mitotic activity and gene expression in relation to embryonic and posthatch muscle growth of broiler chickens

In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks

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Effects of photoperiod during incubation on embryonic and post‐embryonic development of quail and chickens1

Cited by 33 publications

References 7 publications

Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Stimulation with monochromatic green light during incubation alters satellite cell mitotic activity and gene expression in relation to embryonic and posthatch muscle growth of broiler chickens

In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks

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Effects of photoperiod during incubation on embryonic and post‐embryonic development of quail and chickens¹