Unveiling the Potential of Aloe vera Gel Supplementation in a Cooling Extender: A Breakthrough in Enhancing Rooster Sperm Quality and Fertility Ability.

Simple Summary: Cooling rooster semen to a temperature of 5 °C is a technique utilized to extend the preservation period of sperm. However, rooster sperm is highly susceptible to damage during preservation, which involves numerous sources of oxidative stress from dilution, limiting its viability and fertility potential to less than 24 h under cool storage conditions. Therefore, researchers are continuously working to optimize preservation methods to enhance the viability and longevity of rooster semen. The aim of this study was to investigate the effectiveness of Aloe vera gel, known for its beneficial antioxidant properties, on the quality of cooled semen in Thai native roosters (Pradu Hang Dum) and to evaluate the fertility rate after artificial insemination. The results showed that Aloe vera gel contained various bioactive compounds with antioxidant activity. The supplementation of the extender with 1.0% Aloe vera gel proved to be beneficial, reducing lipid peroxidation and simultaneously improving sperm quality during cold storage at 5 °C for up to 72 h. The cooling of semen storage at 5 °C from a Thai native rooster (Pradu Hang Dum), supplemented with herbs possessing antioxidant properties, provided limited research. This study was conducted to evaluate the efficiency of Aloe vera (AV) gel supplementation at various levels on the quality of cooled semen and subsequent fertility after artificial insemination. Sixty-four chickens had semen pooled, diluted, and supplemented with different levels of AV gel (0% as control, 0.25%, 0.50%, 1.0%, 2.5%, 5.0%, 10%, and 20%), and then stored for 72 h. In Experiment 1, semen quality, malondialdehyde (MDA) levels, and pH values were assessed at 0, 24, 48, and 72 h after storage. Experiment 2 assessed fertility potential using the most effective cooled storage semen from Experiment 1. Results showed a decrease in semen quality with prolonged storage time (p < 0.001). The highest semen quality was observed in the group supplemented with 1.0% AV gel (p < 0.001), whereas the lowest was noted in the 20% AV gel group (p < 0.001). Furthermore, the 1.0% AV gel group exhibited the highest semen quality at 24, 48, and 72 h of storage. The evaluation of fertility and hatchability rates revealed a statistically significant improvement in fertility potential (p < 0.05) in the group supplemented with 1.0% AV gel. In summary, this study represents the first investigation of stored Thai native rooster semen using a semen extender supplemented with Aloe vera gel at 5 °C, demonstrating its efficacy for storage up to 72 h. The addition of 1% AV gel was recommended as an antioxidant supplementation during the semen storage process at 5 °C to enhance semen quality and fertility rates. [ABSTRACT FROM AUTHOR]