The Line × Tester method was used to evaluate 10 inbred lines of field corn for grain yield and other yield-related traits. The experiment was conducted in a randomized complete block design with three replications. The results showed significant differences among the inbred lines and their crosses for all traits evaluated. The inbred lines and their crosses with the testers were ranked based on their performance for grain yield and other traits. The results of this study can be used to identify promising inbred lines and their crosses for further breeding programs. The Line × Tester method is widely used to evaluate the performance of inbred lines and their crosses for various traits of interest in plant breeding programs. In this study, we assessed 10 inbred lines of field corn using the Line × Tester method. Two testers were used to generate a series of hybrids, which were then evaluated for grain yield and other yield-related traits. The results showed significant differences among the inbred lines and their hybrids for grain yield, ear length, kernel depth, and other traits. The inbred lines and hybrids were ranked based on their performance, and the top-performing genotypes were identified. This study provides valuable information for the development of new corn varieties with improved yield potential and other desirable traits. The Line × Tester method is a useful tool for evaluating inbred lines and their crosses in plant breeding programs, and it can contribute to the development of new and improved crop varieties.

Assessment, Inbred lines, Field corn

Talukder MZA, Karim ANMS, Ahmed S,Amiruzzaman M. Combining ability and heterosis on yield and its component traits in maize (Zea maysL.). Bangladesh J. Agril. Res. 2016;41(3):565-577.

Sharief AE, El-Kalla SE,GadoHE, Yousef H. Heterosis in yellow maize. Australian J. Crop Science.2009;3:146-154.

Gowda Rk, Kage U, Loththaswa HC, Shekara BG,Shobha D. Combining ability studies in maize (Zea maysL.). Molecular Plant Breeding. 2013;3:(14):116-127.DOI: 10.5376/ijh.2013.03.0014

Kempthorne O. An introduction to genetic statistics. New York,John Wiley and Sons, Inc. London: Chapman and Hall Limited;1957.

Joshi V, Dubey RB,Marker S. Combining ability for polygenic traits in early maturity hybrids of maize (Zea mays L.). Indian J. Genet.Pl. Breed.2002;62:312-315.

Sharma S, Narwal R, Kumar MS,Dass S. Line x tester analysis in maize (Zea mays L.). Forage Res. 2004;30:28-30.

Silva VQR, AmralJu AT, Gonçalves LSA, Freitas JSP, Candido LS, Vittorazzi C. Combining ability of tropical and temperate inbred lines of popcorn.Genet.Mole.Res.2010;9(3):1742-1750.

Moterle LA, Braccini AL, ScapimCA, Pinto RJB, Goncalves LSA, Rodrigues R.Combining ability of popcorn lines for seed quality and agronomic traits. Euphytica.2011;185(3):337-347

.9.Tucak M, Popovic S, Cupic T, Spanic V, Simic B,Meglic V. Combining abilities and heterosis for dry matter yield in alfalfa diallel crosses. NARDI FUNDULEA, Romanian Agril. Res. 2012;29:71-77.

Atif I,Awadalla A,MutasimM. Combining ability and heterosis for yield and yield components in maize (Zea mays L.). Aust. J. Basic and Appl. Sci.2012;6(10):36-41.

Kumar GP, Narsimha Reddy V, Sudheerkumar S, VenkateshwaraRao P,Combining ability studies in newly developed inbred lines in maize (Zea mays L.). Intl. J. of Pl., Ani.andEnv. Sci.2014;4 (4):229-234.

Alam SS, Begum S,Amiruzzaman M. Evaluations of inbred lines of maize through line x Tester method (Set III).Annual Research Report: Maize, Barley, Millet and Sorghum. Plant Breeding Division, BARI, Gazipur.2016;76-80.

Raihan H,Hoque. MM. Evaluations of inbred lines of maize through line x tester method. Annual Research Report: Maize, Barley, Millet and Sorghum. Plant Breeding Division, BARI, Gazipur. 2019;28-32.

Motamedi M, Choukan R, Hervan Em, Bihamta MR,Kajouri FD. Investigation of genetic control for yield and related traits in maize (Zea maysL.) lines derived from temperate and sub-tropical germplasm. Int. J. Biosciences.2014;5(12):123-129.

Ahmed A, Amiruzzaman M,Evaluations of inbred lines of maize through line x tester method (Set VI).Annual Research Report: Maize, Barley, Millet and Sorghum. Plant Breeding Division, BARI, Gazipur.2017;80-89.

Mia MA, Biswas A.Evaluations of inbred lines through through line x tester method (Set III). Annual Research Report: Maize, Barley, Millet and Sorghum. Plant Breeding Division, BARI, Gazipur.201753-61.

Dhasarathan M, Babu C,Iyanar K. Combining ability and gene action studies for yield and quality traits in baby corn (Zea maysL.).SABRAO J. Breed. and Gene. 2015;47(1):60-69.

Bhavana P, Singh RP, Gadag RN. Gene action and heterosis for yield and yield components in maize (Zea mays). Indian J. of Agril. Sci.2011;81(2):163-166.

AminMN, Amiruzzaman M, Ahmed A,Ali MR. Evaluation of Inbred Lines of Maize (Zea maysL.) through Line x Tester Method. Bangladesh J. Agril.Res.2014;39(4):675-683.

Akhi AH, Karim ANM, Ahmed S,Amiruzzaman M. Evaluations of inbred lines through line x Tester method (Set II). Annual Research Report: Maize, Barley, Millet and Sorghum. Plant Breeding Division, BARI, Gazipur.2017;45-52