Publications by authors named "G Rayan"

Article Synopsis
  • - This study examined genetic variations in indigenous chickens, specifically focusing on exons 1 and 6, and assessed the relationship between certain genetic markers (SNPs) and egg quality traits.
  • - While most chicken strains followed expected genetic distributions, some showed significant deviations, particularly affecting the TT genotype, hinting at influences like genetic drift and selection.
  • - The research indicated that specific SNPs can negatively or positively impact egg quality, with certain genotypes linked to better eggshell and yolk characteristics, suggesting their potential use in improving egg quality traits through marker-assisted selection (MAS).
View Article and Find Full Text PDF

Although melanoma accounts for only 5.3% of skin cancer, it results in >75% of skin-cancer-related deaths. To avoid disfiguring surgeries on the head and neck associated with surgical excision, there is a clear unmet need for other strategies to selectively remove cutaneous melanoma lesions.

View Article and Find Full Text PDF

Objective: Better feed efficiency can be achieved by selecting rabbit genotypes with lower residual feed intake (RFI) under high ambient temperatures.

Methods: Two genotypes of rabbits (Jabali, Saudi local breed and imported, Spanish V-line) were used to derive RFI and to investigate the relationship between RFI and productive traits. In total, 250 animals (125 each) were housed in individual wire mesh cages in a semi-closed rabbitry.

View Article and Find Full Text PDF

Fertility and hatchability are 2 major parameters that highly influence the reproductive performance of chicken breeds. The objective of this study is to investigate how the genetic background of chickens affects the aspects of fertility, hatchability, and embryonic mortality pattern. Six different native chicken genotypes (black, black-barred, brown, gray, naked neck, and frizzle) kept under similar conditions were evaluated.

View Article and Find Full Text PDF

The current perspective is a pioneering trial to assess the efficacy of the dietary supplementation of powder (AVP) in the diet of Nile tilapia () on growth performance, blood picture, hepatic and renal biomarkers, immune status, and serum and tissue antioxidant capacity and to investigate the resistance against challenge. Fish ( = 360) were distributed into six groups (three replicates each) and received increasing AVP supplementation levels (0, 2, 4, 6, 8, and 10 g kg) for 60 days. Furthermore, fish were exposed to the bacterial challenge of a virulent strain and maintained under observation for 12 days.

View Article and Find Full Text PDF