Search

Search Results

• Additive and Dominance Effects of MC4R and PIT1 Polymorphisms on Production and Carcass Traits in Duroc Pigs

  Ha Xuan Bo, Nguyen Van Hung, Nguyen Xuan Manh, Nguyen Thi Vinh, Do Duc Luc

  Received: Apr 13, 2022 / Published: Dec 30, 2022

   Abstract PDF

  This study aimed to estimate the allelic and genotypic frequencies of single nucleotide polymorphisms (SNPs) of MC4R (melanocortin-4-receptor gene) and PIT1 (pituitary specific transcription factor-1) genes, and their additive dominance genetic effects on production and carcass traits in Duroc pigs. A total of 2170 tail tissue samples (1728 gilts and 442 male pigs) were collected from Dabaco Nucleus Breeding Pig Company, Bac Ninh province, Vietnam from January 2017 to June 2020. Polymorphisms in the MC4R and PIT1 genes were detected using the PCR-RFLP method. For MC4R, the frequencies of alleles A and G were 0.430 and 0.570, respectively. For PIT1, the frequencies of alleles A and B were 0.460 and 0.540, respectively. The genotype frequency distribution of the MC4R gene was in Hardy-Weinberg equilibrium (P = 0.375), but the genotype frequency distribution of PIT1 (P <0.001) was not. The MC4R and PIT1 polymorphisms were significantly associated with final body weight and average daily gain (P <0.001). Significant additive effects were also found (P <0.05) for the two traits. The selection of individuals with the MC4R genotype AA and PIT1 genotype AA could improve final body weight and average daily gain in Duroc pigs.

• Effects of Guanidinoacetic Acid (GAA) Supplementation on the Growth Performance and Meat Quality in Ross 308 Broiler Chickens

  Bui Huy Doanh, Dinh Thi Yen, Dang Thai Hai, Nguyen Thi Chau Giang, Pham Thi Thu Ha, Nguyen Thi Vinh

  Received: Jul 03, 2025 / Accepted: Sep 24, 2025 / Published: Sep 30, 2025

   Abstract PDF

  This study investigated the effects of dietary guanidinoacetic acid (GAA) supplementation on the growth performance, carcass characteristics, and meat quality in Ross 308 broilers. A total of 270 one-day-old chickens were randomly assigned to three dietary groups: treatment 1 (0.6 g GAA kg-1 feed), treatment 2 (1.2 g GAA kg-1 feed), and a control group (no GAA). GAA supplementation had no significant effect on the survival rate or feed intake (P >0.05). However, it tended to improve the cumulative body weight gain, average daily gain, and feed conversion ratio (FCR) in treatments 1 and 2 during the finishing phase (P <0.05), with the 1.2 g GAA kg-1 feed achieving the lowest overall FCR (1.33). Furthermore, GAA supplementation increased the carcass yield, breast meat yield, and thigh meat yield, and reduced breast meat toughness; however, most of these differences were not statistically significant (P >0.05). These results indicate that dietary GAA supplementation may have the potential to enhance the growth performance and meat quality in Ross 308 broiler chickens.