A comparative study of libido in drakes: from phenotypes to molecules

Ouyang, Qingyuan; Bao, Dewei; Lu, Yao; Hu, Jiwei; Hu, Bo; Lan, Cong; Hu, Shiyan; He, Hua; Liu, Hehe; Liang, Li; Wang, Jiwen

doi:10.1016/j.psj.2021.101503

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…Informally, we noted that some drakes did not attempt to mount females at all, while others were prevented from mounting by flockmates. Recent work by Ouyang et al [ 41 ] revealed that metabolic differences might affect gene expression and signaling pathways important for sexual behaviors and other reproductive traits, thereby contributing to differences in Pekin drake sexual activity. Additionally, variation in mounts could also be attributed to hen receptivity.…”

Section: Discussionmentioning

confidence: 99%

The Impacts of Female Access during Rearing on the Reproductive Behavior and Physiology of Pekin Drakes, and Flock Fertility

Broadus

Lee²,

Makagon

2022

Animals

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Commercially housed Pekin ducks (Anas platyrhynchos) are typically reared in same sex groups to facilitate separate diet provisioning. Several female ducklings are sometimes mixed into the otherwise all-male pens. This practice is thought to increase flock reproductive success. To evaluate this hypothesis, we reared ducklings in alternating same-sex groups (150 hens or 30 drakes/pen; 8 groups/sex) and evaluated the impacts of rearing on drake mounting behavior, testosterone levels, and flock fertility. At 12 days, three females were placed into four of the male duckling pens. At 20–22 weeks of age, adjacent male and female pens were moved into pens within a breeder barn, and combined to form mixed-sex pens. The number of correctly aligned mounts performed by 10 focal drakes per pen was evaluated over 3 days (12 h/day) at 26, 32, and 45 weeks of age. Circulating testosterone concentrations were analyzed from blood plasma samples collected from the focal drakes at 15 (baseline), 22, 28, 34 and 45 weeks of age. Pen-level fertility was determined at 33–34 and 45–46 weeks of age. Mount and testosterone data were analyzed using a Generalized Linear Mixed Model and a Linear Mixed Model in R 4.0.5, with duck in pen as a random effect. A Linear Mixed Model was used to analyze fertility data, with pen as a random effect. None of the measured variables were impacted by rearing treatment, but all varied with flock age. Physical access to female ducklings during rearing did not enhance flock reproductive success.

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Section: Discussionmentioning

confidence: 99%

The Impacts of Female Access during Rearing on the Reproductive Behavior and Physiology of Pekin Drakes, and Flock Fertility

Broadus

Lee²,

Makagon

2022

Animals

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“… Habibullah et al (2015) pointed out that compared to natural mating, AI technology could produce more chicks per hen; and the actual mating capability of each rooster could be increased tenfold through AI technology ( Kharayat et al, 2016 ; Santiago-Moreno et al, 2016 ). Recently, breeders have also started applying this technology in the duck industry ( Ouyang et al, 2021 ; Tang et al, 2022 ). However, in production applications, AI in ducks appears to reduce egg quality and increase the likelihood of health issues such as rectocele, peritonitis, salpingitis, and ascites in female ducks.…”

Section: Introductionmentioning

confidence: 99%

Genome sequencing of drake semen micobiome with correlation with their compositions, sources and potential mechanisms affecting semen quality

Hu,

Li,

Xin

et al. 2024

Poultry Science

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“…Lots of studies found some molecular mechanisms of gonadal development and spermatogenesis by using RNA-seq technology to research reproductive tract in mammals [ 21 , 22 ]. Recently, RNA-seq technology has also been used to explore libido and external genital development of poultry [ 23 , 24 ]. However, the mechanism of epididymis regulating semen volume in drakes remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptome Analysis Provided a New Insight into the Molecular Mechanisms of Epididymis Regulating Semen Volume in Drakes

Ouyang

Tang

et al. 2022

Animals

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Semen volume is an important factor in artificial insemination (AI) of ducks. In drakes, seminal plasma that is produced by the epididymis determines the semen volume. However, the mechanism of epididymis regulating semen volume of drakes remains unclear. Therefore, the aim of the present study was to preliminarily reveal the mechanism regulating the semen volume through comparing the epididymal histomorphology and mRNA expression profiles between drakes with high-volume semen (HVS) and low-volume semen (LVS). Phenotypically, drakes in the HVS group produced more sperm than drakes in the LVS group. In addition, compared with the HVS group, the ductal square of ductuli conjugentes (DC) and dutus epididymidis (DE) in epididymis was significantly smaller in the LVS group, and the lumenal diameter and epithelial thickness of DC/DE were significantly shorter in the LVS group. In transcriptional regulation, 72 different expression genes (DEGs) were identified from the epididymis between HVS and LVS groups. Gene Ontology (GO) analysis indicated that the DEGs were mainly related to hormone secretion, neurotransmitter synthesis/transport, transmembrane signal transduction, transmembrane transporter activity, and nervous system development (p < 0.05). Kyoto Encyclopedia of Genes and Genomes (KEGG) functional enrichment analysis showed that the DEGs were significantly enriched in pathways associated with hormone and neurotransmitter transmission (p < 0.05). In addition, further analysis of the top five pathways enriched by KEGG, nine key candidate genes (including SLC18A2, SNAP25, CACNA1B, GABRG2, DRD3, CAMK2A, NR5A1, and STAR) were identified, which could play a crucial role in the formation of semen. These data provide new insights into the molecular mechanism regulating semen volume of drakes and make feasible the breeding of drakes by semen volume.

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A comparative study of libido in drakes: from phenotypes to molecules

Cited by 5 publications

References 37 publications

The Impacts of Female Access during Rearing on the Reproductive Behavior and Physiology of Pekin Drakes, and Flock Fertility

The Impacts of Female Access during Rearing on the Reproductive Behavior and Physiology of Pekin Drakes, and Flock Fertility

Genome sequencing of drake semen micobiome with correlation with their compositions, sources and potential mechanisms affecting semen quality

Comparative Transcriptome Analysis Provided a New Insight into the Molecular Mechanisms of Epididymis Regulating Semen Volume in Drakes

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