Comprehensive Evaluation Of Early-Maturing And High-Yielding Soybean (Glycine Max L.) Genotypes Under Competitive Variety Testing Conditions
Keywords:
Soybean, Glycine max, early maturityAbstract
Developing early maturing and high yielding soybean cultivars is essential for improving production efficiency and ensuring crop stability under increasingly variable climatic conditions. In this study, eight soybean genotypes were evaluated under competitive variety testing conditions in 2020, with the early maturing cultivar ‘Orzu’ serving as the standard check. Field trials were conducted in 14 m² plots at a sowing density of 400,000 seeds ha⁻¹, and phenological, morphological, reproductive, and yield-related traits were comprehensively assessed.
Growth duration among the tested genotypes ranged from 88 to 102 days, compared with 109 days for the standard cultivar. Lines L 125 and K 9182 matured 18–21 days earlier than Orzu, demonstrating strong potential for short season environments. Considerable variation was observed in plant height (72–122 cm), first pod height (10–17 cm), number of branches (1–3), and pods per plant (72–136), indicating significant morphological diversity within the evaluated germplasm.
Seed yield varied from 210 to 375 g/m², with the highest productivity obtained from L 125, which also displayed the greatest pod setting capacity. Correlation analysis further confirmed that yield was most strongly influenced by the number of pods per plant (r = 0.91), while early maturity exhibited a negative relationship with yield (r = –0.72), reinforcing the value of early maturing, intensively fruiting genotypes.
Based on integrated trait evaluation, genotypes L 125, K 122, K 137, and K 171 were identified as promising breeding sources for future cultivar development. The superior line L 125, later named ‘Zarbuloq’, was submitted to the State Variety Testing Commission for official evaluation due to its high yield potential, early maturity, and favorable plant architecture.
References
Fasoula, V.A., et al. (2020). “Phenotypic selection and yield improvement in soybean breeding.” Euphytica, 216: 207.
Dold, C., et al. (2019). “Soybean phenology: environmental and genetic control.” Agronomy Journal, 111(5): 2380–2392.
Board, J.E., and Kahlon, C.S. (2011). “Soybean yield formation: Factors determining seed number.” Crop Science, 51: 1965–1975.
Yamaguchi, N. et al. (2019). “Influence of early maturity genes on soybean growth and yield.” Field Crops Research, 230: 56–65.
Fehr WR. Principles of cultivar development: Theory and technique. Macmillan Publishing, New York.
Board JE, Kahlon CS. Soybean production physiology. Field Crops Research, 103(1), 13–22.
Hartman GL, West ED, Herman TK. Soybean — worldwide production and constraints. Food Security, 3, 5–17.
Liu X, Li Y, Wang J. Evaluation of soybean germplasm by morphological traits. Plant Breeding, 136(5), 540–548.
Rahman MM, Ali M. Variation of early maturing soybean lines. Legume Research, 41(5), 783–789.
Singh P, Sharma A. Evaluation of soybean genotypes for maturity traits. Journal of Crop Science, 10(3), 45–52.
Karimov MS, Abduhalilov S. Soybean morphological traits under irrigation. Journal of Crop Research and Breeding, 26(4), 51–58.
Ciampitti IA, Salvagiotti F. Determinants of soybean yield potential. Agronomy Journal, 110(4), 1185–1196.
Egli DB. Soybean yield physiology. Crop Science, 57(1), 1–15.
Board JE, Modali H. Analysis of soybean yield components. Crop Science, 45(5), 1790–1799.
Orazov A, Ismoilov A. Yield of soybean cultivars in Central Asia. Asian Journal of Agriculture, 8(2), 115–121.
Salvagiotti F, Cassman KG, Specht JE, et al. Nitrogen use and soybean productivity. Field Crops Research, 108, 1–13.
Liu K. Soybeans: Chemistry, technology, and utilization. Springer.
Panthee DR, Pantalone VR. Genetic analysis of soybean protein content. Euphytica, 152(2), 219–225.
Kumar R, Singh P, Sharma A. Multi year evaluation of soybean protein stability. Legume Research, 43(4), 475–482.
Li Y, Chen Y, Zhang X. Environmental stability of soybean seed quality traits. Crop Journal, 4(3), 231–239.
Khan MA, Singh SP, Sharma HC. Correlation and path analysis of soybean yield components. Journal of Integrative Agriculture, 18(4), 785–795.
Debnath S, Bhowmik P. Multivariate and heatmap analysis of soybean traits. Plant Science Today, 8(2), 144–150.
Johnson HW, Robinson RF, Comstock RE. Estimation of genetic parameters and environmental variance using PCA and clustering.
Biometrics, 15(3), 321–331.
Montgomery DC, Runger GC. Applied multivariate statistics and correlation matrix interpretation in plant science. Wiley Publications, New York, pp. 210–232.
Wickham H. Data visualization in agriculture: Heatmaps and advanced correlation plots. Journal of Statistical Graphics, 12(2), 55–78.
Draper NR, Smith H. Regression analysis of agricultural traits and yield prediction models. Applied Regression Analysis, Wiley, pp. 98–122.
Kearsey MJ, Pooni HS. Genotype–trait association mapping using multivariate statistical tools.Genetics in Plant Breeding, Chapman & Hall, pp. 145–166.
Gujarati DN. Multicollinearity and trait interdependency in biological datasets.
Basic Econometrics, 4th edition, McGraw-Hill, pp. 359–375.
Friendly M, Monette G. Scatter plot matrices in trait analysis and multidimensional data visualization. American Statistician, 54(4), 316–324.
Jolliffe IT. Principal component and multivariate visualization methods in plant breeding. Principal Component Analysis, Springer, New York, pp. 1–65.
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