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Luo X, Guo J, Zhang J, Ma Z, Li H. Overview of chicken embryo genes related to sex differentiation. PeerJ 2024; 12:e17072. [PMID: 38525278 PMCID: PMC10959104 DOI: 10.7717/peerj.17072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 02/18/2024] [Indexed: 03/26/2024] Open
Abstract
Sex determination in chickens at an early embryonic stage has been a longstanding challenge in poultry production due to the unique ZZ:ZW sex chromosome system and various influencing factors. This review has summarized the genes related to the sex differentiation of chicken early embryos (mainly Dmrt1, Sox9, Amh, Cyp19a1, Foxl2, Tle4z1, Jun, Hintw, Ube2i, Spin1z, Hmgcs1, Foxd1, Tox3, Ddx4, cHemgn and Serpinb11 in this article), and has found that these contributions enhance our understanding of the genetic basis of sex determination in chickens, while identifying potential gene targets for future research. This knowledge may inform and guide the development of sex screening technologies for hatching eggs and support advancements in gene-editing approaches for chicken embryos. Moreover, these insights offer hope for enhancing animal welfare and promoting conservation efforts in poultry production.
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Affiliation(s)
- Xiaolu Luo
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Jiancheng Guo
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Jiahang Zhang
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Zheng Ma
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Hua Li
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
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Akosile OA, Kehinde FO, Oni AI, Oke OE. Potential Implication of in ovo Feeding of Phytogenics in Poultry Production. Transl Anim Sci 2023; 7:txad094. [PMID: 37701128 PMCID: PMC10494881 DOI: 10.1093/tas/txad094] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/28/2023] [Indexed: 09/14/2023] Open
Abstract
Hatchery's goals include maximizing revenue by achieving high hatchability with day-old birds of excellent quality. The advancement of technology has benefited the poultry sector since breeding and genetics technology have increased the rates of meat maturation in developing birds in a short period of time. Excessive use of in-feed antibiotics has been shown in studies to increase the chance of resistance to human infections. Bacterial resistance and antibiotic residues in animal products raised concerns about using antibiotics as growth promoters, eventually leading to a prohibition on using in-feed antibiotics in most industrialized nations. In ovo technology is a novel method for delivering bioactive chemicals to developing avian embryos. In ovo feeding technologies may provide additional nutrients to the embryos before hatching. The introduction of bioactive compounds has the potential to assist in decreasing and eventually eliminating the problems associated with traditional antibiotic delivery in chicken production. Phytobiotics were advocated as an alternative by researchers and dietitians. So far, several studies have been conducted on the use of phytogenic feed additives in poultry and swine feeding. They have primarily demonstrated that phytobiotics possess antibacterial, antioxidant, anti-inflammatory, and growth-stimulating properties. The antioxidant effect of phytobiotics can improve the stability of animal feed and increase the quality and storage duration of animal products. In general, the existing documentation indicates that phytobiotics improve poultry performance. To effectively and efficiently use the in ovo technique in poultry production and advance research in this area, it is important to have a thorough understanding of its potential as a means of nutrient delivery during the critical stage of incubation, its effects on hatching events and posthatch performance, and the challenges associated with its use. Overall, this review suggests that in ovo feeding of phytobiotics has the potential to improve the antioxidant status and performance of chickens.
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Affiliation(s)
| | - Festus Olasehinde Kehinde
- Department of Animal and Environmental Biology, Faculty of Natural Science, Kogi State University, Anyigba, Nigeria
| | - Aderanti Ifeoluwa Oni
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - Oyegunle Emmanuel Oke
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
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3
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Impacts of synthetic androgen and estrogenic antagonist administration on growth performance, sex steroids hormones, and immune markers of male and female broilers. Poult Sci 2022; 102:102244. [PMID: 36335738 PMCID: PMC9640317 DOI: 10.1016/j.psj.2022.102244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 09/23/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
The influence of synthetic androgen and estrogenic antagonists (Tamoxifen) on body characteristics and immune response of male and female broilers and the correlation between sex hormone levels were estimated in our experiment. One day old chicks were sexed, and chicks of each sex were randomly distributed on three experimental treatments; the first treatment group (TAM20) chicks were supplied with estrogenic antagonist tamoxifen citrate 20 mg/kg body weight through oral administration for four times every other day from third until ninth d; Androgen treatment chicks were injected intramuscular with veterinary androgen AD GAN@ (Boldenone Undecylenate 50 mg) 1 cm/10 kg body weight at fifth and ninth day, and the third treatment was control. Androgen treatment reported the highest feed intake with the lowest for TAM20 treatment. Concerning carcass characteristics, early androgen injection increased breast percentage significantly compared to TAM20 treatment. Androgen supplementation increased significantly comb the percentage. However, TAM20 decreased it particularly compared to control. Moreover, the percentage of comb and shanks was substantially higher for males than females. Concerning the effects of both treatments on sex hormones, androgen showed favorable effects on testosterone and estrogen compared to Tamoxifen 20 treatment. On the other hand, the administration of TAM 20 improves phagocytic activity compared to androgen administration.
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Younis MEM, Alaryani FS, Jaber FA, Aboelnour A, Shukry M, Taha AE, Abd El-Hack ME, Tufarelli V, Losacco C, Abo Ghanima MM. Impacts of sex steroids and aromatase inhibitor on performances, carcass characteristics and gonadal histology of broiler chickens slaughtered at different ages. Reprod Domest Anim 2022; 57:1375-1393. [PMID: 35876715 DOI: 10.1111/rda.14215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/23/2022] [Indexed: 11/27/2022]
Abstract
This experiment was established to evaluate the influence of synthetic steroid hormone and aromatase inhibitor on performance, carcass characteristics, hormonal profile and gonadal structure of broiler chickens slaughtered at two different ages. A total of 360 Cobb Avian48 chicks were sexed and distributed randomly into three groups: Tam10 group; birds received Tamoxifen10mg (Tamfen 10 mg@ ) orally at a level of 10 mg/kg body weight daily from the 3rd till the 9th day of age; BOL group: birds injected intramuscularly with Boldenone undecylenate (BOLD-GAN@ 0.1 mg/kg) at the 5th and the 9th day of age; and Control group. BOL injection or Tam supplementation improved performance traits compared with the control group. Although Tam positive effect appeared early before the 5th week of age, the BOL effect was delayed to the 6th week. BOL injection improved carcass characteristics of both sexes at both 5 and 6 weeks slaughtering ages. Regardless of treatment effect, the mortality% was higher in the late weeks of age than in the early weeks. Moreover, BOL treatment increased comb% compared with control and Tam treatments. Generally, males had significantly higher testosterone levels and lower oestrogen levels than females. Males treated with Boldenone had the highest testosterone level, although testosterone levels did not differ considerably among females of the various groups. BOL treatment females had the lowest oestrogen level. Both Tam10 and Boldenone had adverse effects on testicular and ovarian histology, affecting the typical structures. Finally, we concluded that the anabolic effect of Tam10 may be achieved in griller broilers production without changing the sex hormones assay. Although Boldenone achieved an anabolic effect without changing blood sex hormone levels, this effect is induced early with females and delayed with males, which prolongs the marketing period. The goal is to shorten this period. Therefore, this material can only be used with the possibility of separating females from males to be used with females only.
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Affiliation(s)
- Mona E M Younis
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Fatima S Alaryani
- Biology Department, Faculty of Sciences, University of Jeddah, Jeddah, Saudi Arabia
| | - Fatima A Jaber
- Biology Department, Faculty of Sciences, University of Jeddah, Jeddah, Saudi Arabia
| | - Asmaa Aboelnour
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Mustafa Shukry
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Ayman E Taha
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Alexandria University, Behira, Rasheed, Edfina, Egypt
| | | | - Vincenzo Tufarelli
- Department of DETO, Section of Veterinary Science and Animal Production, University of Bari 'Aldo Moro', Valenzano, Italy
| | - Caterina Losacco
- Department of DETO, Section of Veterinary Science and Animal Production, University of Bari 'Aldo Moro', Valenzano, Italy
| | - Mahmoud M Abo Ghanima
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
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Smirnov AF, Leoke DY, Trukhina AV. Natural and Experimental Sex Reversal in Birds and Other Groups of Vertebrates, with the Exception of Mammals. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422060114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abdulateef SM, Majid AA, Al-Bayer MA, Shawkat SS, Tatar A, Mohammed TT, Abdulateef FM, Al-Ani MQ. Effect of aromatase inhibitors on sex differentiation and embryonic development in chicks. Vet Med Sci 2021; 7:2362-2373. [PMID: 34472216 PMCID: PMC8604131 DOI: 10.1002/vms3.623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background Sexual differentiation can occur after exposure to aromatase into the left gonad at 6.5 days of incubation. Aromatase inhibitors work by inhibiting the action of the aromatase, which converts androgens into estrogens by a process called aromatization. Objectives The aim of this study was to investigate the effect of in ovo exposure to the aromatase inhibitor from tomato and garlic extract on sexual differentiation and embryonic development in chicken embryos. Methods Three hundred eggs divided into five groups: Control 1 (CO; no injection); control 2 distilled water, DW; 0.1 ml/egg); garlic extract (GAR; 0.1 mg/egg); tomato extract (TOM; 0.1 mg/egg); and garlic and tomato extract mixed (ATM, 0.1 ml/egg). The solution was prepared and injected into the albumin from the thin end of the eggs on day five by using a 1 ml syringe with a 23‐gauge needle. The embryonic test (embryo/egg weight) conducted at 7, 14 and 17 days of incubation. After hatching, feather sexing conducted to determine the initial male. Chicks sex was later confirmed on day 42 by an optical microscope lens. Results The results revealed that there was a significant increase (p < 0.01) in embryonic growth traits in all experimental treatments as compared to control treatments. There was a significant increase (p < 0.01) in the percentage of hatchability for all experimental treatments compared to control treatments and a significant increase (p < 0.01) in chick quality including one‐day‐old chick length and body weight. All experimental treatments showed a significant increase (p < 0.01) in the male‐to‐female ratio compared to control treatments. Conclusions The effect of in ovo exposure to aromatase inhibitors stimulated female‐to‐male sex reversal and improved embryonic development.
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Affiliation(s)
- Salwan M Abdulateef
- Animal Production, College of Agriculture, University of Anbar, Ramadi, al-Anbar, Iraq
| | - Ahmad A Majid
- Animal Production, College of Agriculture, University of Anbar, Ramadi, al-Anbar, Iraq
| | - Mohammed A Al-Bayer
- Animal Production, College of Agriculture, University of Anbar, Ramadi, al-Anbar, Iraq
| | - Srwd S Shawkat
- Animal Sciences, College of Agricultural Sciences, University of Sulaimani, Sulaimani, Kurdistan, Iraq
| | - Ahmad Tatar
- Animal Science Research Department, Golestan Agricultural and Natural Resources Research and Education Center, AREEO, Gorgan, Iran
| | - Thafer T Mohammed
- Animal Production, College of Agriculture, University of Anbar, Ramadi, al-Anbar, Iraq
| | - Firas M Abdulateef
- Ministry of Agriculture - Directorate of Anbar Agriculture, Ramadi, Iraq
| | - Mohammed Q Al-Ani
- Department of Biology, College of Science, University of Anbar, Ramadi, al-Anbar, Iraq
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Oke OE, Oyelola OB, Iyasere OS, Njoku CP, Oso AO, Oso OM, Fatoki ST, Bankole KO, Jimoh IO, Sybill NI, Awodipe HO, Adegbite HO, Rahman SA, Daramola JO. In ovo injection of black cumin (Nigella sativa) extract on hatching and post hatch performance of thermally challenged broiler chickens during incubation. Poult Sci 2020; 100:100831. [PMID: 33516471 PMCID: PMC7936144 DOI: 10.1016/j.psj.2020.10.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/30/2020] [Accepted: 10/31/2020] [Indexed: 01/13/2023] Open
Abstract
The objective of this study was to investigate the effects in ovo injection of black cumin (BC) extract on chick's quality and response of thermally challenged broiler chickens. A total of 700 hatching eggs of broiler chickens (Marshall) were assigned to 7 treatments of 100 eggs each and incubated using the conventional protocol (37.8°C) for the first 10 d and then exposed to a high temperature (39.6°C) for 6 h daily from day 10 until day 18 of the incubation. At embryonic day 17.5, the eggs were randomly allotted to 7 treatment groups, viz.: eggs without in ovo injection (WA), eggs injected with 0.9% saline solution (SA), 3 mg ascorbic acid (AA), 2 mg BC (TB), 4 mg BC (FB), 6 mg BC (SB), and 8 mg BC (EB) extracts. Experiment was laid out in a Completely Randomized Design. After hatching, the chicks were reared separately according to in ovo treatments for 8 wk. Data were collected on hatchability, chick quality, internal organs, growth performance, plasma superoxide dismutase, malondialdehyde, and triiodothyronine (T3). The results showed that the hatchability of the eggs in the AA group was similar to that of SB eggs and higher than that of the other treatment groups. The intestinal weights of SB and EB birds were significantly higher (P < 0.05) than those of TB, SA, and WA. The final weights of the birds of SB and AA were higher (P < 0.05) than those of other treatments. The feed conversion ratio of the birds of TB and FB was comparable to that of EB and WA but higher than that of SB and AA. At hatch, the creatinine of the birds in SA and WA was similar to that of EB, FB, and TB but higher (P < 0.05) than that of AA and SB. Also, the plasma malondialdehyde, T3, and superoxide dismutase of SB and AA birds were better (P < 0.05) than those of the control groups. Overall, it was concluded that 6 mg of BC extract improved the antioxidant status and posthatch performance of thermally challenged broiler chickens.
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Affiliation(s)
- O E Oke
- Centre of Excellence in Avian Science, University of Lome, Lome, Togo; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria.
| | - O B Oyelola
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - O S Iyasere
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - C P Njoku
- Department of Animal Production and Health, Federal University of Agriculture, Abeokuta, Nigeria
| | - A O Oso
- Department of Animal Nutrition, Federal University of Agriculture, Abeokuta, Nigeria
| | - O M Oso
- Centre of Excellence in Avian Science, University of Lome, Lome, Togo
| | - S T Fatoki
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - K O Bankole
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - I O Jimoh
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - N I Sybill
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - H O Awodipe
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - H O Adegbite
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - S A Rahman
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - J O Daramola
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
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Oladokun S, Adewole DI. In ovo delivery of bioactive substances: an alternative to the use of antibiotic growth promoters in poultry production—a review. J APPL POULTRY RES 2020. [DOI: 10.1016/j.japr.2020.06.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Younis ME, Aboelnour A, Swelum AA, Ghoneim HA, Abd El-Hack ME, Khafaga AF, Al-Ghadi MQ, Al-Himadi AR, Almutairi BO, Ammari AA, Ghanima MMA. Impact of Oral Supplementation of Different Levels of Tamoxifen on Productive and Reproductive Efficiencies and Carcass Traits of Avian48 and Arbor Acres Broilers. Animals (Basel) 2020; 10:E1367. [PMID: 32781769 PMCID: PMC7459955 DOI: 10.3390/ani10081367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/30/2020] [Accepted: 08/03/2020] [Indexed: 11/16/2022] Open
Abstract
This research was aimed at estimating the effect of oral supplementation of Tamoxifen on productive efficiency, carcass characteristics, hormonal profile and gonadal structure of two broiler breeds. One hundred and eighty chicks of each breed of Avian48 and Arbor Acres were divided into three groups: control group; TAM10 group, supplied with 10 mg Tamoxifen/kg of body weight at 3, 5, 7 and 9 days of life; and TAM20 group, supplied at the same intervals with 20 mg Tamoxifen/kg of body weight. Both levels of Tamoxifen improved productive performance at early ages, but Arbor Acres produced better results with TAM20 levels than TAM10, while Avian48 breeds reacted adversely. On the contrary, Tamoxifen supplementation significantly decreased feed intake and feed conversion (after the first two weeks of life) compared to control with a higher level of decrease reported for TAM20 treatments than TAM10 and for Arbor Acres compared to Avian48 breed. Carcass traits were not affected significantly with Tamoxifen supplementation compared to control although Arbor Acres responded better to TAM20 and Avian48 for TAM10. With regard to the effect of Tamoxifen (TAM) on sex hormones, it could be concluded that TAM10 treatments showed a stimulating effect on the level of such hormones as compared with the TAM20 group with the most favourable results being clearly detectable in 42-day-old birds although both concentrations of Tamoxifen did not differ significantly from control. However, treatment of broiler chickens with Tamoxifen in different doses caused a gradual decrease in follicle production rate and eventually led to an increase of the atretic follicles in different stages of atresia. Finally, we can conclude that Tamoxifen supplementation can improve performance and carcass efficiency of broilers without changing the hormonal profile, however much research is required to estimate the best concentration required for each breed.
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Affiliation(s)
- Mona E.M. Younis
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | - Asmaa Aboelnour
- Department of Histology and cytology Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | - Ayman A. Swelum
- Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt
| | - Hanan A. Ghoneim
- Department of Physiology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | | | - Asmaa F. Khafaga
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Edfina 22758, Egypt
| | - Muath Q. Al-Ghadi
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed R. Al-Himadi
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Bader O. Almutairi
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Aiman A. Ammari
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Thamar University, Dhamar 87246, Yemen
| | - Mahmoud M. Abo Ghanima
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
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Al-Shammari K, Batkowska J, Drabik K, Gryzińska M. Time of sexual maturity and early egg quality of Japanese quails affected by in ovo injection of medicinal plants. Arch Anim Breed 2019; 62:423-430. [PMID: 31807653 PMCID: PMC6852847 DOI: 10.5194/aab-62-423-2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 05/14/2019] [Indexed: 01/09/2023] Open
Abstract
The aim of this study was to evaluate the time to sexual maturity and quality of initial eggs of Japanese quail affected by in ovo injection of plant extracts: ginger (GR), garlic (GC), oregano (O) and cinnamon (C). In total, 2400 eggs of Japanese quails were divided into six groups on the fifth day of incubation. Group I was the control group (NC), which was not injected. Other eggs were injected with 0.1 mL of liquid: group II - the positive control (PC) - with distilled water, group III with 1 % solution of GR, group IV with GC, group V with O and group VI with C. After hatching, the birds were reared in a cage system and fed with balanced mixtures, and 24 h lighting was used. The time at which birds reached sexual maturity was registered, while in the seventh week of rearing, 120 eggs were subject to quality evaluation. The traits of a whole egg (shape index as the ratio of egg width to egg length, weight, specific gravity), shell (strength, weight, thickness and density), albumen (weight, height), yolk (color, weight, index) were evaluated. At the earliest, on 36th day of life, eggs were laid by birds from the GC group, followed by C (37th day), O and NC (38th day), GR (39th day), and PC (41st day). During the first 2 weeks significantly more eggs were collected from the GC than from the other groups. The heaviest eggs derived from GC and GR groups, whereas the lightest came from the C group. Eggs from the GC group had the best shell strength and the greatest proportion of yolk. The use of medicinal herbs by injection in ovo may considerably modify both time of sexual maturity and quality of the initial eggs of Japanese quail.
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Affiliation(s)
- Karrar I. A. Al-Shammari
- Department of Animal Production Techniques, Al-Musaib Technical
College, Al-Furat Al-Awsat Technical University, Babylon Province, Babylon, Iraq
| | - Justyna Batkowska
- Institute of Biological Basis of Animal Production, University of Life
Sciences in Lublin, 13 Akademicka St., 20-950 Lublin, Poland
| | - Kamil Drabik
- Institute of Biological Basis of Animal Production, University of Life
Sciences in Lublin, 13 Akademicka St., 20-950 Lublin, Poland
| | - Magdalena M. Gryzińska
- Institute of Biological Basis of Animal Production, University of Life
Sciences in Lublin, 13 Akademicka St., 20-950 Lublin, Poland
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11
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Sun BJ, Li T, Mu Y, McGlashan JK, Georges A, Shine R, Du WG. Thyroid hormone modulates offspring sex ratio in a turtle with temperature-dependent sex determination. Proc Biol Sci 2017; 283:rspb.2016.1206. [PMID: 27798296 DOI: 10.1098/rspb.2016.1206] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 09/29/2016] [Indexed: 11/12/2022] Open
Abstract
The adaptive significance of temperature-dependent sex determination (TSD) has attracted a great deal of research, but the underlying mechanisms by which temperature determines the sex of a developing embryo remain poorly understood. Here, we manipulated the level of a thyroid hormone (TH), triiodothyronine (T3), during embryonic development (by adding excess T3 to the eggs of the red-eared slider turtle Trachemys scripta, a reptile with TSD), to test two competing hypotheses on the proximate basis for TSD: the developmental rate hypothesis versus the hormone hypothesis Exogenous TH accelerated embryonic heart rate (and hence metabolic rate), developmental rate, and rates of early post-hatching growth. More importantly, hyperthyroid conditions depressed expression of Cyp19a1 (the gene encoding for aromatase) and levels of oestradiol, and induced more male offspring. This result is contrary to the direction of sex-ratio shift predicted by the developmental rate hypothesis, but consistent with that predicted by the hormone hypothesis Our results suggest an important role for THs in regulating sex steroid hormones, and therefore, in affecting gonadal sex differentiation in TSD reptiles. Our study has implications for the conservation of TSD reptiles in the context of global change because environmental contaminants may disrupt the activity of THs, and thereby affect offspring sex in TSD reptiles.
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Affiliation(s)
- Bao-Jun Sun
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Teng Li
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Yi Mu
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Jessica K McGlashan
- Science and Health Hawkesbury Institute, University of Western Sydney, New South Wales 2751, Australia
| | - Arthur Georges
- Institute for Applied Ecology, University of Canberra, Australian Capital Territory 2601, Australia
| | - Richard Shine
- School of Life and Environmental Sciences A08, University of Sydney, New South Wales 2006, Australia
| | - Wei-Guo Du
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
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12
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Miśta D, Króliczewska B, Pecka-Kiełb E, Kapuśniak V, Zawadzki W, Graczyk S, Kowalczyk A, Łukaszewicz E, Bednarczyk M. Effect of in ovo injected prebiotics and synbiotics on the caecal fermentation and intestinal morphology of broiler chickens. ANIMAL PRODUCTION SCIENCE 2017. [DOI: 10.1071/an16257] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Manipulations of the intestinal microbiota composition may improve the health and performance of chickens. In ovo technology allows the administration of a bioactive substance to enter directly into the incubating egg. The objective of the present study was to investigate the effect of in ovo administered prebiotics or synbiotics on microbial activity products in the caeca and the development of the small intestine of broiler chickens. Ross 308 male chickens hatched from eggs injected in ovo with prebiotics or synbiotics were used in this study. Five experimental groups were formed: C (Control) – injected with 0.9% NaCl, the Pre-1 and Pre-2 groups – injected with prebiotics: inulin or Bi2tos, respectively, and the Syn-1 and Syn-2 groups – injected with synbiotics: inulin with Lactococcus lactis subsp. lactis IBB SL1 or Bi2tos with Lactococcus lactis subsp. cremoris IBB SC1, respectively. At the age of 7, 21 and 35 days, 10 chicks of each group were randomly selected, weighed and slaughtered, and the jejunal samples were collected for histological examinations, whereas caecal samples were collected to analyse the end products of microbial fermentation. Synbiotic treatment increased bodyweight, as observed in the Syn-1 group (P < 0.05). The propionate molar proportion was highest in the groups treated with synbiotics, especially in the Syn-1 group (P < 0.01). Furthermore, the molar proportion of acetate was also lowest in the Syn-1 group (P < 0.05). In ovo synbiotics treatment increased the villus length : crypt depth ratio in the jejunal mucosa, which might improve nutrient absorption and contribute to the increased weight of chickens. These effects suggest that the in ovo administration of synbiotics may be an effective method to increase bodyweight, improve the short-chain fatty acid caecal profile and increase the villus length : crypt depth ratio in the jejunal mucosa. These effects were more pronounced in the Syn-1 group than the Syn-2 group.
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