Ujjainkar, Dr. V. V.MORE, HITAISHI SUDHIR.2023-12-202023-12-202021-10-13MORE, HITAISHI SUDHIR. (2021). Genetic Studies in Ajwain (Trachyspermum ammi L.). Department of Agricultural Botany, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2021. Print. xiii, 87p. (Unpublished).https://krishikosh.egranth.ac.in/handle/1/5810204019The present investigation entitled “Genetic Studies in Ajwain (Trachyspermum ammi L.)’’ was carried out with twenty-six genotypes. The experiment was conducted in Randomized Block Design with three replications during Rabi 2020-2021 at Chilli and Vegetable Research Unit Dr. PDKV, Akola. The observations were recorded on five randomly selected plants, from each genotype in each replication. The thirteen characters studied were days to first flowering, days to 50 per cent flowering, days to maturity, plant height at maturity, number of primary branches per plant, length of first internode, number of umbels per plant, number of umbellate per umbel, number of seeds per umbel, number of seeds per umbellate, diameter of main umbel, test weight and seed yield per plant. The data so obtained was subjected to analysis of variance, correlation studies and path analysis. Genotypes, PDKV AJ 11, PDKV AJ 10, PDKV AJ 16, PDKV AJ 06, PDKV AJ 04, PDKV AJ 09, PDKV AJ 20, PDKV AJ 12, AA-19-01, PDKV AJ 18, PKV-07AA-2 and PDKV AJ 22 found high potential for seed yield, whereas PDKV AJ 14, PDKV AJ 19, PDKV AJ 02, PDKV AJ 04, PDKV AJ 18, PDKV AJ 20 were the early maturing genotypes. Analysis of variance indicated significant differences among the genotypes for all the traits under study. The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV). The high values of GCV and PCV observed for days to first flowering, days to 50 per cent flowering, days to maturity, plant height at maturity, number of primary branches per plant, length of first internode, number of umbels per plant, number of umbellate per umbel, number of seeds per umbel, number of seeds per umbellate, diameter of main umbel, test weight and seed yield per plant. High heritability was observed for test weight followed by number of umbels per plant, seed yield per plant, days to first flowering, number of seeds per umbel, number of umbellate per umbel and days to 50 per cent flowering. High genetic advance was observed for number of seeds per umbel, number of umbels per plant, days to first flowering and plant height at maturity. Seed yield per plant was significant and positively correlated with days to first flowering, days to 50 per cent flowering, days to maturity, plant height at maturity, number of primary branches per plant, number of umbels per plant and number of umbellate per umbel. The path coefficient analysis revealed that days to 50 per cent flowering, number of primary branches, length of first internode, number of umbels per plant, number of umbellate per umbel, number of seeds per umbellate and test weight showed positive direct effect on seed yield per plant. Hence, these characters may be given consideration while formulating selection indices for the improvement programme in ajwain.EnglishThesis