Background: Twenty distinct wheat genotypes were examined using the path coefficient analysis and correlation of yield-attributing and to determine their direct and indirect effects on grain yield using path coefficient analysis. The experiment was conducted in IAAS Paklihawa Campus, Bhairahawa in 2023 during the winter season in late sowing conditions.
Methods: Two replications in heat stress conditions along with recommended irrigation by the National Wheat Research Program (NWRP). Ten plants were randomly taken from each genotype as a sample plant to measure the six characteristics. Correlation and path coefficient were used for twenty genotypes including three check varieties.
Results: The result revealed highly significant positive and negative relationships among the genotypes for all the traits studied. The highest positive correlation of 0.366 was obtained between Tillers per meter square and yield whereas the lowest positive correlation of 0.060 was expressed between total grain weight and yield.
Conclusion: Breeding efforts should encouraged for those wheat genotypes with tall lengths and higher spike weights in order to boost wheat yields under situations of heat stress.
correlation, path coefficient, breeding, genotypes, wheat
Aryal, S., Dhungel, B., Subedi, K. R., Lamichhane, P., & Bhattarai, S. (2021). Response of Wheat Parameters To Sowing Date and Irrigation Supplied in Terai Region of Nepal. Tropical Agrobiodiversity, 2(1), 07–09. https://doi.org/10.26480/trab.01.2021.07.09
Bhandari, R., & Poudel, M. R. (2024). Genotype × environment interaction and selection parameters for high yielding wheat genotypes under irrigated and heat stress environment. Journal of Sustainable Agriculture and Environment, 3(1). https://doi.org/10.1002/sae2.12098
Bishwas, K. C., Poudel, M. R., & Regmi, D. (2021). AMMI and GGE biplot analysis of yield of different elite wheat line under terminal heat stress and irrigated environments. Heliyon, 7(6), e07206. https://doi.org/10.1016/j.heliyon.2021.e07206
Dhakal, A., Bhandari, R., Nyaupane, S., Paudel, H., Panthi, B., & Poudel, M. R. (2023). Agro Morphological Analysis of Wheat Genotype Under Heat Stress Condition. Journal of Food and Agriculture Research, 3(1), 35–43.
Kumar, A., Yadav, V. K., Maurya, C. L., Singh, S. V., Shweta, Kumar, J., & Naik, B. S. D. (2024). Estimate of Genotypic and Phenotypic Correlation and Path Coefficients in Bread Wheat (Triticum aestivum L.). Journal of Advances in Biology & Biotechnology, 27(3), 149–170. https://doi.org/10.9734/jabb/2024/v27i3730
Ozukum, W., Avinashe, H., Dubey, N., Kalubarme, S., & Kumar, M. (2019). Correlation and path coefficient analyses in bread wheat (Triticum aestivum L.). Plant Archives, 19(2), 3033–3038.
Pandey, D., Pant, K. R., Bastola, B. R., Giri, R., Bohara, S., Shrestha, S., Hamal, G. B., & Shrestha, J. (2021). Evaluation of bread wheat genotypes under rain-fed conditions in Terai districts of Nepal. Journal of Agriculture and Natural Resources, 4(2), 303–315. https://doi.org/10.3126/janr.v4i2.33946
Petrović, S., Vila, S., Grubišić Šestanj, S., & Rebekić, A. (2024). Variation in Nutritional Value of Diverse Wheat Genotypes. Agronomy, 14(2). https://doi.org/10.3390/agronomy14020311
Pokhrel, D., Raj Pant, K., Raman Upadhyay, S., Pandey, D., Raj Gautam, N., Khatri, N., Prasad Yadav, R., Ram Ghimire, B., Prasad Poudel, R., Prasad Poudel, B., Prasad Paudel, G., Raj Yadav, D., & Basnet, R. (2019). Development of suitable wheat varieties for terminal heat stress environment in Terai region of Nepal. January 2022, 20–21.
Poudel,M.R.,Neupane M.P.,Panthi B.,Bhandari R.K., Nyaupane S.L., Dhakal A., and Paudel H.K.. (2023). “Identification of Drought Tolerant Wheat (Triticum Aestivum) Genotypes Using Stress Tolerance Indices in the Western Terai Region of Nepal.” Research on Crops 24(4): 652–59. doi:10.31830/2348-7542.2023.
Poudel, M. R., Poudel, H. K., & Bhandari, R. (2024). Impact of terminal heat stress on performance of Nepalese wheat (Triticum aestivum L.) genotypes. Research on Crops, 25(1), 1-11.
Poudel, M. R., Neupane, M. P., Paudel, H., Bhandari, R., Nyaupane, S., Dhakal, A., & Panthi, B. (2023). Agromorphological analysis of wheat (Triticum aestivum L.) genotypes under combined heat and drought stress conditions. Farming & Management, 8(2), 72-80.
Puri, R. R., Tripathi, S., Bhattarai, R., Dangi, S. R., & Pandey, D. (2020). Wheat Variety Improvement for Climate Resilience. Asian Journal of Research in Agriculture and Forestry, 6(2), 21–27. https://doi.org/10.9734/ajraf/2020/v6i230101
Wooldredge, J. (2021). Path Analysis. The Encyclopedia of Research Methods in Criminology and Criminal Justice: Volume II: Parts 5-8, November 2017, 515–522. https://doi.org/10.1002/9781119111931.ch105
