Assessment of growth and yield variability in F₄ generation of China aster cross Arka Poornima × AAC-1

China aster (Callistephus chinensis), a widely cultivated ornamental crop belonging to the Asteraceae family, is extensively grown in India for various floral applications, including loose flowers, cut flowers, and decorations. The present study assessed genetic variability, heritability, and genetic advance in fifteen F₄ lines derived from the cross Arka Poornima ×AAC-1 at Kittur Rani Channamma College of Horticulture, Arabhavi, during the Rabi season of 2023-24. The experiment followed a randomized block design (RBD). Results revealed significant genetic variability, with traits such as individual flower weight (heritability: 94.43%, genetic advance: 67.82%) and flower yield per plant (heritability: 85.13%, genetic advance: 43.47%) showing high heritability and genetic advance, indicating strong additive gene action. Traits with moderate to low heritability and genetic advance were more influenced by environmental factors, suggesting limited potential for direct selection. The findings emphasize the potential of selecting high-yielding genotypes to develop improved China aster cultivars with enhanced ornamental and commercial value.