Cloning and tissue expression profiling of theGnRHRgene of the Muscovy duck (Cairina moschata): polymorphism and association with egg-laying performance

2015 ◽  
Vol 56 (2) ◽  
pp. 164-174 ◽  
Author(s):  
X. Wu ◽  
M.J. Yan ◽  
X.P. Wan ◽  
S.Y. Lian ◽  
A. Li
Keyword(s):  
Expression Profiling ◽  
Tissue Expression ◽  
Egg Laying ◽  
Muscovy Duck ◽  
Cairina Moschata ◽  
Laying Performance

scholarly journals Egg-laying and brooding stage-specific hormonal response and transcriptional regulation in pituitary of Muscovy duck (Cairina moschata)

2019 ◽  
Vol 98 (11) ◽  
pp. 5287-5296
Author(s):  
Pengfei Ye ◽  
Kai Ge ◽  
Min Li ◽  
Lei Yang ◽  
Sihua Jin ◽  
...  
Keyword(s):  
Transcriptional Regulation ◽  
Egg Laying ◽  
Muscovy Duck ◽  
Hormonal Response ◽  
Cairina Moschata

scholarly journals Differential expression profiling of estrogen receptor in the ovaries of two egg duck (Anas platyrhynchos) breeds

2014 ◽  
Vol 59 (No. 5) ◽  
pp. 238-243 ◽  
Author(s):  
Y. Wu ◽  
H.W. Xiao ◽  
Z.H. Liang ◽  
A.L. Pan ◽  
J. Shen ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Real Time ◽  
Differential Expression ◽  
Real Time Pcr ◽  
Expression Profiling ◽  
Egg Laying ◽  
Quantitative Real Time Pcr ◽  
Expression Difference ◽  
Laying Performance ◽  
Differential Expression Profiling

In the present study, quantitative real-time PCR was employed to investigate expression profiling and expression difference of ESR1 and ESR2 in ovaries of Shaoxing duck and Jingjiang duck during three laying stages. Results showed the expression levels of ESR1 and ESR2 in ovaries were increased from the age of the first egg to the age of 500 days in both duck breeds. The expression of ESR1 in Shaoxing duck was lower than that in Jingjiang duck for the age of the first egg and of 180 days, and for the age of 500 days it was higher in Shaoxing duck than in Jingjiang duck. The ESR2 showed converse expression profiling in the two duck breeds. The results suggest that ESR1 and ESR2 mediate the process of egg laying in ducks, and that ESR2 may play a more important role for the ovary during egg-laying stages and may be closely related to the laying performance of the ducks.    

Investigation of insulin-like growth factor-1 gene with egg-laying traits in the Muscovy duck (Cairina moschata)

2016 ◽  
Vol 96 (2) ◽  
pp. 203-214 ◽  
Author(s):  
X. Wu ◽  
X.T. Liu ◽  
J.J. Lan ◽  
X.P. Wan ◽  
M.J. Yan ◽  
...  
Keyword(s):  
Growth Factor ◽  
Marker Gene ◽  
Gonad Development ◽  
Egg Laying ◽  
Primary Concern ◽  
Muscovy Duck ◽  
Insulin Like Growth Factor ◽  
Expression Levels ◽  
Cairina Moschata ◽  
First Time

Muscovy duck (Cairina moschata) is characterized by broodiness, and egg-laying traits in this species should be of primary concern. As a member of the IGF superfamily of proteins, insulin-like growth factor-1 (IGF-1) is an important positive regulator of growth and gonad development in vertebrates. To explore the effect of IGF-1 on the growth hormone/insulin-like growth factors (GH/IGF) axis, we cloned and characterized IGF-1 of Muscovy duck. The expression level of IGF-1 was widely expressed in all the tested tissues, and the highest level was detected in the liver. In laying ducks, IGF-1 expression levels in the hypothalamus, pituitary, and ovary were very significantly higher (P < 0.01) than that in the tissues of nesting duck, and IGF-1 expression levels in the heart and liver were significantly higher (P < 0.05) than that in nesting duck tissues. Furthermore, a single nucleotide polymorphism (SNP) (A/G) was found and significantly (P < 0.05) associated with age at first egg and egg number at 300 d. This study provides the first evidence that IGF-1 promote egg-laying traits of Muscovy duck through two axes, involving GH/IGF and hypothalamic–pituitary–gonadal axes. These findings enrich the information of IGF-1 of Muscovy duck and demonstrate for the first time the ability of IGF-1 to promote reproduction, indicating that IGF-1 could be used as an important marker gene.

Ovarian transcriptomic analysis of black Muscovy duck at the early, peak and late egg-laying stages

Gene ◽  
2021 ◽  
Vol 777 ◽  
pp. 145449
Author(s):  
Zhigang Hu ◽  
Jing Liu ◽  
Junting Cao ◽  
Huilin Zhang ◽  
Xiaolin Liu
Keyword(s):  
Egg Laying ◽  
Transcriptomic Analysis ◽  
Muscovy Duck ◽  
Early Peak

scholarly journals Quantitative PCR tissue expression profiling of the human SGLT2 gene and related family members

2010 ◽  
Vol 1 (2) ◽  
pp. 57-92 ◽  
Author(s):  
Jian Chen ◽  
Sandy Williams ◽  
Samantha Ho ◽  
Howard Loraine ◽  
Deborah Hagan ◽  
...  
Keyword(s):  
Quantitative Pcr ◽  
Expression Profiling ◽  
Family Members ◽  
Tissue Expression ◽  
Related Family

scholarly journals Transcriptional responses in jejunum of two layer chicken strains following variations in dietary calcium and phosphorus levels

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Henry Reyer ◽  
Michael Oster ◽  
Siriluck Ponsuksili ◽  
Nares Trakooljul ◽  
Adewunmi O. Omotoso ◽  
...  
Keyword(s):  
Vitamin D ◽  
High Performance ◽  
Absorption Capacity ◽  
Egg Laying ◽  
Endocrine Regulation ◽  
Transcriptional Responses ◽  
Endogenous Factors ◽  
Mineral Homeostasis ◽  
Laying Performance ◽  
Vitamin D Levels

Abstract Background Calcium (Ca) and phosphorus (P) are essential nutrients that are linked to a large array of biological processes. Disturbances in Ca and P homeostasis in chickens are associated with a decline in growth and egg laying performance and environmental burden due to excessive P excretion rates. Improved utilization of minerals in particular of P sources contributes to healthy growth while preserving the finite resource of mineral P and mitigating environmental pollution. In the current study, high performance Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) hens at peak laying performance were examined to approximate the consequences of variable dietary Ca and P supply. The experimental design comprised four dietary groups with standard or reduced levels of either Ca or P or both (n = 10 birds per treatment group and strain) in order to stimulate intrinsic mechanisms to maintain homeostasis. Jejunal transcriptome profiles and the systemic endocrine regulation of mineral homeostasis were assessed (n = 80). Results Endogenous mechanisms to maintain mineral homeostasis in response to variations in the supply of Ca and P were effective in both laying hen strains. However, the LSL and LB appeared to adopt different molecular pathways, as shown by circulating vitamin D levels and strain-specific transcriptome patterns. Responses in LSL indicated altered proliferation rates of intestinal cells as well as adaptive responses at the level of paracellular transport and immunocompetence. Endogenous mechanisms in LB appeared to involve a restructuring of the epithelium, which may allow adaptation of absorption capacity via improved micro-anatomical characteristics. Conclusions The results suggest that LSL and LB hens may exhibit different Ca, P, and vitamin D requirements, which have so far been neglected in the supply recommendations. There is a demand for trial data showing the mechanisms of endogenous factors of Ca and P homeostasis, such as vitamin D, at local and systemic levels in laying hens.

scholarly journals Active Yeast but Not Henhouse Environment Affects Dropping Moisture Levels in Egg-Laying Hens

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2179
Author(s):  
Xue Cheng ◽  
Yuchen Liu ◽  
Zhong Wang ◽  
Lujiang Qu ◽  
Zhonghua Ning
Keyword(s):  
Environmental Factors ◽  
Egg Quality ◽  
Animal Health ◽  
Egg Laying ◽  
Production Costs ◽  
Production Performance ◽  
Absolute Pressure ◽  
Poultry Production ◽  
Production Environment ◽  
Laying Performance

Dropping moisture (DM) refers to the water content in feces. High DM negatively affects poultry production, environment, production costs, and animal health. Heredity, nutrition, environment, and disease may affect DM level. DM has medium inheritability and is related to cage height in henhouses. We examined the relationship among DM level, production performance, and environmental factors at different locations at the same henhouse height and effects of three types of additives. We measured the correlation between environmental factors including temperature, humidity, CO2 concentration, absolute pressure, and DM levels and laying performance of 934 Rhode Island Red hens. DM level was not significantly associated with environmental factors or production performance. We divided 64 persistently high DM hens into control and treatment groups supplied with different additives (probiotics, anisodamine, and antibiotics). DM levels, laying performance, egg quality, and serum biochemical indices were determined. Compared with the control and antibiotics, probiotics significantly reduced DM levels and eggshell strength while improving yolk color but did not significantly affect production performance. The additives reduced the b value of eggshell color; compared with probiotics, anisodamine decreased serum globulin levels. Exogenous active yeast supplementation can significantly reduce DM levels.

The laying of male eggs by bumble bee queens: an experimental reappraisal and a new hypothesis

1990 ◽  
Vol 68 (3) ◽  
pp. 493-497 ◽  
Author(s):  
R. C. Plowright ◽  
C. M. S. Plowright
Keyword(s):  
Egg Production ◽  
Egg Laying ◽  
Bumble Bee ◽  
Factors Associated ◽  
Laying Performance ◽  
Laying Workers ◽  
New Hypothesis

The hypothesis that proximal factors associated with high worker density in a bumble bee (Bombus terricola) colony trigger laying of male eggs by the queen was examined in a series of four experiments. Neither the age of workers, the presence or absence of laying workers, nor the amount of pollen available to the colony affected the date of first male egg laying. Moreover, queens that had begun laying male eggs did not revert to laying female eggs after being removed from their colonies and placed in isolation. Instead, onset of male egg production appeared to be associated with the date of attainment of a critical worker/larva ratio in the colony. Functional considerations lead to the new hypothesis that queens monitor their egg-laying performance and begin to lay male eggs when it can be predicted that their female eggs will be raised as young queens.

scholarly journals Studies on Egg Laying Performance of the Gifu Native Fowl.

1997 ◽  
Vol 34 (3) ◽  
pp. 200-204
Author(s):  
Kunio KANEKO ◽  
Kaoru OKANO ◽  
Noboru FUJIHARA
Keyword(s):  
Egg Laying ◽  
Laying Performance
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