Ajwain is an aromatic seed spice which is cultivated mainly for its seed, herb and volatile oil. The narrow genetic base and allogamy are the major challenges in the crop improvement of ajwain. The study on the relationship between yield and its components will improve the efficiency of breeding programs by determining appropriate selection criteria. An investigation was carried out in 16 genotypes of ajwain to study the association among yield components and their direct and indirect effects on seed yield. Positive correlations were observed between seed yield per plant with number of umbels per plant (0.975), harvest index (0.882), number of branches (0.623), test weight (0.531), number of flowers per umbel (0.511) and number of seeds per umbel (0.457). Genotypic path coefficient analysis indicated that plant height at 150 DAS, days to 50 per cent flowering, number of flowers per umbel, number of umbellate per umbel, harvest index and test weight had positive direct effect on seed yi

Ajwain, Trachyspermum ammi, genotypes, umbels, umbellate.

Genotypic correlation analysis indicated that seed yield per plant had highly significant and positive association with the number of branches per plant, number of flowers per umbel, number of umbels per plant, number of seeds per umbel, harvest index and test weight. Genotypic path coefficient analysis indicated that plant height at 150 DAS, days to 50 per cent flowering, number of flowers per umbel, number of umbellate per umbel, harvest index, and test weight had positive direct effect on seed yield of ajwain. The positively associated characters can be used for crop improvement programme in future.

Chaitanya, K., Narayanapur, V.B., Vishwanath, Y.C. and Sarvamangala, C. (2021). Correlation and Path Analysis in Ajwain (Trachyspermum ammi L.). Biological Forum – An International Journal, 13(2): 600-605.