This study aimedto identify the SNP g.643G>Aof MYF5 genethen associate it with body weight and body size measurements in Bali cattle. Blood samples were collectedfrom 80 bali cattle at BPTU-HPT Denpasar Bali. Data on phenotypic properties observed included; birth weight, live weight, average daily gain, body length, chest depth, withers height, hip height, and heart girth. Polymorphismof the MYF5 gene was identifiedusing the PCR-RFLP method. Association of MYF5 genotypes with body weight and body size measurementswas performed using General Linear Model by SAS 9.4 program. MYF5│MspI gene was polymorphic with three genotypes: AA, AG, and GG. Genotype frequency of AA, AG and GG were 0.04 (3), 0.30 (24), and 0.65 (53), respectively. Allele frequencies were 0.19 and 0.81 for A and G alleles, respectively. Gene frequency analysis showed that Bali cattle at BPTU-HPT Denpasar was in Hardy-Weinberg Equilibrium. Association of MYF5│MspI gene with body weight and body measurement were not significantly different. SNP g.643G>A could not be used as a genetic marker for the body weight and body size measurements in Bali cattle.

Background: Nutrition is one of determining factor for the quality of human resources. Nutritional problems can be in the form of excess nutrition (obesity) or malnutrition. A person's nutritional status depends on nutritional intake and needs. Objective: To determine the association between nutritional status and iron status in students of Junior High School of 39 Kerinci Regency Jambi Province in 2020. Method: It was an associative analytic with cross-sectional approach. The were 25 students recruited using the total sampling technique. Univariate data analysis was presented in the form of frequency distribution and percentage and bivariate analysis using the chi-square test and data processing using the computerized SPSS version 25.0 program. Result: there was an association between nutritional status and iron status in students of Junior High School of 39 Kerinci Regency Jambi Province in 2020 (p=0.029). Conclusion: there was an association between nutritional status and iron status in students Junior High School of 39 Kerinci Regency Jambi Province