Expression and analysis of ESR1, IGF-1, FSH, VLDLR, LRP, LH, PRLR genes in Pekin duck and Black Muscovy duck

Hypothalamic and ovarian transcriptome profiling reveals potential candidate genes in low and high egg production of white Muscovy ducks (Cairina moschata)

“…The ovaries are pair-like of ova-producing organs (produces egg cells) that maintain the distinction of being an endocrine gland due to the secretion of hormones (estrogen and progesterone), which is vital for normal reproductive development and fertility. In a study by Liu et al (2021) , insulin-like growth factor-1 ( IGF-1 ), prolactin receptor ( PRLR ), follicle-stimulating hormone ( FSH ), very low-density lipoprotein receptor ( VLDLR ), low-density lipoprotein receptor-related protein ( LRP ), estrogen receptor 1 ( ESR1 ), and Luteinizing hormone receptor ( LHR ) are essential genes for egg production traits of Pekin duck and Black Muscovy duck.…”

The study of candidate genes in the improvement of egg production in ducks – a review

“…Prolactin and its receptor have been reported to regulate follicle development and egg production ( Wang et al, 2011b ; Asiamah Amponsah et al, 2019 ). The expressions of PRLR were extremely significantly associated with an increase in laying at the peak laying stage which infers that PRLR might promote egg production in Black Muscovy duck ( Liu et al, 2021c ). Furthermore, the polymorphism of the PRL gene has shown that PRL might be a candidate gene that controls egg-laying parameters and reproduction in ducks ( Wang et al, 2011b ; Bai et al, 2019 ).…”

“…Based on the expression profile of FSH mRNA in 14 different selected tissues, the ovary had the highest expression level of FSH when compared to other tissues while obvious mRNA expression of FSH was observed in lung, liver, and abdominal fat ( Xu et al, 2017 ). Also, the study by Liu et al (2021c) on the expression level of FSH in 3 stages of laying of Peking and Black Muscovy duck, FSH decreased in the peak laying period of Peking duck while the expression level of FSH in the Black Muscovy duck at the peak stage of laying was extremely significant compared to early and late stages of laying ( Liu et al, 2021c ). Sixteen SNPs were identified within 2,860 bp region of the Muscovy duck FSHR gene ( Xu et al, 2017 ).…”

“…In laying birds, there is a periodic fluctuation in the expression levels of LH and LHR with ovulation activity ( Liu et al, 2021c ). Despite this, there was a gradual increase in expression of LHR during follicle development before ovulation, while there is a decline in the granulosa cells of the biggest follicle before ovulation, this reduction might be mediated by the steroids ( Liu et al, 2021c ). In a report by Yamamura et al (2001) , the high levels of LH might inhibit the expression of LHR .…”

Effects of stocking density on ovarian development and maturation during the rearing period in Shan-ma ducks

“…FSH and LH secreted by the pituitary regulate the follicular development and synthesis of the steroid hormones by binding to the FSHR and LHR at the gonad level ( Johnson and Woods, 2009 ; Liu et al, 2021 ). AMH is mainly secreted by ovarian granulosa cells and plays an important role in inhibiting the growth of the primary follicles in the ovary, as well as the follicular recruitment and sensitivity to FSH ( Durlinger et al, 2001 ).…”