A. M., PATELSOURABH KUMAR2023-04-152023-04-152021-11-15https://krishikosh.egranth.ac.in/handle/1/5810196412The present investigation was carried out to study the “Evaluation of coriander (Coriandrum sativum L.) genotypes for seed yield and its attributing characters” among forty genotypes of coriander for seed yield and its attributing traits. The experiment was arranged in a randomized block design with three replications at the Agronomy Instructional Farm, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar during rabi 2019-20. The observations for this investigation were recorded for various twelve traits viz., days to flowering, days to maturity, plant height, number of branches per plant, number of seeds per umbellate, number of umbellates per umbel, number of umbels per plant, test weight, harvest index, biological yield per plant, volatile oil and seed yield per plant. The analysis of variance revealed significant differences among the genotypes for all the characters studied indicating presence of adequate amount of variability consisting forty genotypes. Moderate to high GCV and PCV was observed for number of seeds per umbellate. Moderate PCV and GCV were depicted by the traits viz. number of branches per plant, number of umbels per plant, harvest index and volatile oil, which suggests the possibility of improving these traits through simple selection. High heritability was observed for days to flowering, plant height and volatile oil. High value of genetic advance as per cent of mean was recorded for volatile oil followed by number of seeds per umbellate and number of branches per plant. High heritability coupled with high genetic advance as per cent of mean observed for volatile oil, indicating that trait strongly influenced of additive gene action. High values of genotypic correlations than their corresponding phenotypic correlations were recorded for the all the characters under study. This indicated that, there was high amount of relationship between two variables at genotypic level and its phenotypic expression was let down by the influence of environmental factors and also indicated the importance of these characters in improvement of seed yield in coriander. Seed yield had genotypically positive and highly significant association with number of branches per plant, plant height, number of seeds per umbellate, number of umbellates per umbel, number of umbels per plant and test weight, suggesting utility as selection indices in seed yield improvement. The path analysis revealed that the number of umbels per plant, test weight, plant height, number of seeds per umbellate, biological yield per plant and harvest index had high and positive direct effects on seed yield per plant. However, some characters days to flowering, number of branches per plant, number of umbellates per umbel, days to maturity and volatile oil had negative direct effect on seed yield. It can be emphasized that the improving seed yield in coriander more attention should be given to number of umbels per plant, test weight, plant height, number of seeds per umbellate and harvest index while making selection for developing high yielding coriander cultivar. The genetic divergence measured by Mahalanobis D2 statistic, clustered forty genotypes studied for seed yield into eight clusters. The maximum inter cluster distance was observed between cluster II and VIII followed by cluster II and V. The attributes, viz., seed yield per plant, test weight, harvest index, number of seeds per umbellate, volatile oil, days to flowering, and number of branches per plant would be useful for generating transgressive segregants if commercially practicable as these seven traits contributed maximum towards total genetic divergence. On the source of all the above studies, it can be concluded that more emphasis should be given to plant height, number of branches per plant, number of seeds per umbellate, number of umbellates per umbel, number of umbels per plant, test weight and seed yield per plant while doing selection for genetic improvement in coriander. Based on the mean performance of seed yield per plant, genotypes viz., G Cor 3, Dhana-98, G Cor 1, COR 192, G Cor 2 and JCr 2013-1 were categorized as high yielding genotypes. So, for the improvement of yield and their components traits more emphasis could be given to these genotypes and with planning of research for more number of seasons and locations to get more precise result.EnglishThesis