Assessing the genetic diversity of Indian Kharif sorghum landraces through agro-morphological characterization (Sorghum bicolor L. Moench)
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Abstract
The agro-morphological characterization of local germplasm provides insight into existing diversity, enables the identification of desirable traits, and enhances crop improvement. The present study evaluated 96 kharif sorghum (Sorghum bicolor L. Moench) landraces and 6 checks using 20 agro-morphological traits at two locations, ICAR-IIMR in Hyderabad and Experimental Farm at Annamalai University in Annamalai Nagar, using alpha lattice design with 2 replications during 2021 kharif to assess genetic diversity. Results showed significant genetic variability among the 20 traits (P<0.01), providing opportunities for improvement. The high genotypic (GCV) and phenotypic components of variance (PCV) exhibited among the traits indicated their genetic determination and potential for improvement through breeding programs. High heritability and genetic advance also indicated the presence of additive genes, offering reliable improvement through trait selection. The correlation analysis showed a strong positive relationship between grain yield and several desirable traits, including panicle length, width, primary branch length, hundred seed weight, number of leaves, and total tillers per plant, indicating that grain yield can be improved by selecting accessions with desirable characteristics for these traits. The Cluster analysis using Euclidean distance revealed (four distinct clusters), with Cluster I being the most differentiated. These clusters may serve as valuable resources for hybridization programs. The PCA analysis indicated that the first three PCs accounted for 43.26% of the total variation and highlighted the key agro-morphological traits driving diversity. The results of this study demonstrated the significant genetic diversity among kharif sorghum landraces, providing a promising opportunity for varietal development programs.
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Keywords
Agro-morphological characterization, Cluster analysis, Genetic variability, Kharif sorghum landraces, PCA analysis
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Desai, A. K., Mishra, G. P., Patel, N. V., Solanki, V. P. & Kotecha, P. M. (2021). Genetic diversity analysis of sorghum landraces from Gujarat region of India. Journal of Pharmacognosy and Phytochemistry, 10(2), 415-422.
Deshmukh, S. N. N., Basu, M. S. & Reddy, P. S. (1986). Genetic Variability, Character Association and Path Coefficients of Quantitative Traits in Virginia Bunch Varieties of Groundnut. Indian Journal of Agricultural Science, 56, 816-821.
Dwivedi, S. L., Ceccarelli, S., Blair, M. W., Upadhyaya, H. D. & Ortiz, R. (2016). Landrace germplasm for improving yield and abiotic stress adaptation. Trends in Plant Science, 21, 31-42. 10.1016/j.tplants.201 5.10.012
Elangovan, M. & Babu, P. K. (2015). Genetic variability and diversity of sorghum landraces collected from Uttar Pradesh, India. Indian Journal of Plant Genetic Resources, 28(2), 213-221.
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Assessing the genetic diversity of Indian Kharif sorghum landraces through agro-morphological characterization (Sorghum bicolor L. Moench). (2023). Journal of Applied and Natural Science, 15(2), 624-638. https://doi.org/10.31018/jans.v15i2.4477
