Selenium Injection in Dam Rabbits During Gestation Has Important Effects on Progeny Productive Performance

Area of Science:

• Animal Science
• Reproductive Biology
• Nutritional Science

Background:

• Micromineral elements are crucial for organogenesis and fetal development.
• Selenium (Se) plays a vital role in mammalian reproduction and embryonic development.

Purpose of the Study:

• To evaluate the impact of selenium (Se) injection in pregnant rabbits during critical developmental stages on their offspring's productive performance.
• To determine if the timing of Se administration (organogenesis vs. rapid fetal growth) influences progeny outcomes.

Main Methods:

• 30 pregnant New Zealand rabbits were divided into three groups: Control (saline), Early Se administration (day 13), and Late Se administration (day 23).
• Selenium was administered intramuscularly at 0.10 mg/kg body weight during specific gestation periods.
• Offspring were assessed for kindling performance, pre-weaning growth, carcass traits, organ weights, and blood biochemical parameters.

Main Results:

• No significant differences were observed in dam kindling performance or offspring pre-weaning growth.
• Selenium administration altered progeny carcass traits (forelimb weight/muscle) and organ weights (liver, lungs, spleen).
• Se-treated groups exhibited lower glucose, triglyceride, and cholesterol levels compared to controls, with timing-dependent effects.

Conclusions:

• Gestational selenium injection in rabbits positively impacts offspring carcass and organ development.
• The timing of selenium administration during gestation influences specific developmental and metabolic outcomes in progeny.
• Selenium supplementation during pregnancy offers potential benefits for rabbit production traits.