Age-related changes in the mitochondrial, synthesis of steroids, and cellular homeostasis of the chicken ovary.

In poultry reproduction, the decline of ovarian function due to aging is related to dysfunction of mitochondria exacerbated by a reduction in antioxidant capacity, ultimately leading to follicle atresia and decreased egg production. However, the mechanisms of mitochondrial dysfunction in the chicken ovary in aging have remained to be understood. Hence, this study aims to investigate the effects of aging on mitochondrial function and cellular homeostasis.

Effects of melatonin on testicular function in adult male mice under different photoperiods.

Photoperiod is an important environmental factor affecting animal physiological function. Melatonin is an endogenous hormone that plays an important role in circadian and seasonal (or cyclical) rhythms and seasonal reproduction in mammals. To investigate the effects of melatonin on the reproductive performance of adult male mice under different photoperiods, sixty mice were randomly allotted to six groups: control (Light Dark, 12 L:12 D), control plus melatonin (MLD, 12 L:12 D), 24-hour continuous light (LL, 24 L:0 D), 24-hour continuous light plus melatonin (MLL 24 L:0 D), constant darkness (DD, 0 L:24 D), and constant darkness plus melatonin (MDD, 0 L:24 D).

Long-day photoperiods affect expression of OPN5 and the TSH-DIO2/DIO3 pathway in Magang goose ganders.

This study sought to understand the regulation mechanism of OPN5 through the TSH-DIO2/DIO3 pathway mediated photoperiod on the breeding activity of short-day breeding birds. In this study, the reproductive activity of Magang goose was regulated by artificial light, and the reproductive activity of the ganders were determined according to the daily laying rate of female geese. The testicular development and the serum reproductive hormone concentrations of ganders were measured during the reproductive period (d 0), the reproductive degeneration period (d 13 and 27) and the resting period (d 45).

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

Stocking density critically affects the growth and subsequent performance of animals in modern poultry production. This study investigated the effects of stocking density on ovarian development, ovarian maturation, and the mRNA expression of key genes in the reproductive axis during the rearing period of Shan-ma ducks. The experiments involved 180 healthy 7-wk-old Shan-ma ducks and randomly divided into low stocking density (LSD; n = 30, density = 5 birds/m), medium stocking density (MSD; n = 60, density = 10 birds/m) and high stocking density groups (HSD; n = 90, density = 15 birds/m), for rearing.

Differential Transcriptomic and Metabolomic Responses in the Liver of Nile Tilapia (Oreochromis niloticus) Exposed to Acute Ammonia.

Ammonia is toxic to aquatic animal. Currently, only limited works were reported on the responses of aquatic animals after ammonia exposure using "omics" technologies. Tilapia suffers from the stress of ammonia-nitrogen during intensive recirculating aquaculture.

Identifying a Long QTL Cluster Across chrLG18 Associated with Salt Tolerance in Tilapia Using GWAS and QTL-seq.

Understanding the genetic mechanism of osmoregulation is important for the improvement of salt tolerance in tilapia. In our previous study, we have identified a major quantitative trait locus (QTL) region located at 23.0 Mb of chrLG18 in a Nile tilapia line by QTL-seq.

Rapid and sensitive detection of goose parvovirus and duck-origin novel goose parvovirus by recombinase polymerase amplification combined with a vertical flow visualization strip.

Goose parvovirus (GPV) is one of the most serious viral pathogens in goslings. Recently, a new pathogen to the Chinese mainland-duck-origin novel goose parvovirus (N-GPV)-was found to be 90.8-94.

Genome-wide identification and differentially expression analysis of lncRNAs in tilapia.

Background: Long noncoding RNAs (LncRNAs) play important roles in fundamental biological processes. However, knowledge about the genome-wide distribution and stress-related expression of lncRNAs in tilapia is still limited.

Results: Genome-wide identification of lncRNAs in the tilapia genome was carried out in this study using bioinformatics tools.

Identification of Goose PKR Gene: Structure, Expression Profiling, and Antiviral Activity Against Newcastle Disease Virus.

Double-stranded RNA-dependent protein kinase (PKR) is an important antiviral IFN-stimulated gene (ISGs) that recognizes double-stranded RNA (dsRNA) and mediates inhibition of translation initiation and protein synthesis in various types of viral infection. In this study, the complete coding sequence (CDS) of goose PKR (goPKR) is identified and characterized. The open reading frame (ORF) of goPKR is 1668 bp, which encodes a polypeptide of 555 amino acids.

Identifying a Major QTL Associated with Salinity Tolerance in Nile Tilapia Using QTL-Seq.

Selection of new lines with high salinity tolerance allows for economically feasible production of tilapias in brackish water areas. Mapping QTLs and identifying the markers linked to salinity-tolerant traits are the first steps in the improvement of the tolerance in tilapia through marker-assisted selection techniques. By using QTL-seq strategy and linkage-based analysis, two significant QTL intervals (chrLG4 and chrLG18) on salinity-tolerant traits were firstly identified in the Nile tilapia.