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Evaluation of Double Cross Maize Hybrids at Different Locations

A. Ahmed
Plant Breeding Division, BARI

M. Amiruzzman
M.A.A. KHAN, A. BISWAS AND M.A. MIAH
Plant Breeding Division, BARI

M.A.A. Khan
Plant Breeding Division, BARI

A. Biswas
Plant Breeding Division, BARI

M.A. Miah
Plant Breeding Division, BARI

Abstract/ Executive Summary:

An experiment was conducted with locally developed double cross maize hybrids along with two checks namely BARI hybrid maize 6 (BHM-6) and Pacific60 (Pac60) for evaluation of their performance at Jessore, Khagrachari, Ishurdi and Joydebpur during rabi 2014-15. Considering the yield potentiality and stability parameter, A-9 and A-17 exhibited high yielder as well as stable over all environments. Entry A-10 was a high yielder with moderate stability, but responsive to environments. The mean sum of squares for the genotypes were highly significant for days to tasseling, days to silking, plant height, ear height and grain yield. Environmental mean sum squares were also highly significant for all the character studies. The highly significant effects of environment indicate high differential genotypic response across the different environments. Environment relative magnitude was much higher than the genotypic effect, suggesting that performance of each genotype was influenced more by environmental factors. Relatively lower value of bi, say around 1 means less responsive to the environmental change and therefore, more adaptive. If however, bi was negative, the genotype might be grown only in poor environment.The hybrids A-9 (Pac60/S₃-10×Pac60/S₃-9)×(9MG/S₃-2×9MG/S₃-4), A-10 (Pac60/S₃-10×Pac60/S₃-9)×(9MG/S₃-3×9MG/S₃-4) & A-17 (Pac60/S₃-14×Pac60/S₃-15)×(9MG/S₃-16×9MG/S₃-14) might be selected for large plot observation trial.

Keywords: Double cross, Maize, Hybrids, Adaptability

Location: Jessore, Khagrachari, Ishurdi and Joydebpur

Start Date: 00-00-2014

End Date: 00-00-2015

Program Area: Variety and Species

Commodity: Maize

Objectives:

To evaluate double cross maize hybrids for their adaptability and stability of performance for yield and yield components across different locations of Bangladesh.

Methodology:

The experiment was conducted at Jessore, Khagrachari, Ishurdi and Joydebpur during rabi 2014-15. Sixteen locally developed double cross maize hybrids along with two checks namely BARI hybrid maize 6 (BHM-6) and Pacific60 (Pac60) were evaluated in this study. Experimental seeds were sown on November 2014. Experimental design was alpha lattice with two replications. Spacing was 60 cm × 20 cm between row to row and hill to hill, respectively. After seedling emergence one healthy plant per hill was kept after proper thining. Fertilizers were applied @ 250, 55, 110, 40 and 5 kg/ha at N, P, K, S and Zn, respectively. Standard agronomic practices were followed and plant protection measures were taken as required. Data on days to pollen shedding, days to silking and grain yield were recorded on whole plot basis. Ten randomly selected plants were used for recording observations on plant and ear height. The grain yield (ton ha^-1) data was assessed and corrected to 12% moisture. The ANOVA was used and the GE interaction was estimated by the AMMI model (Zobel et al., 1988; Duarte and Vencovsky, 1999). In this procedure, the contribution of each genotype and each environment to the GE interaction is assessed by use of the biplot graph display in which yield means are plotted against the scores of the first principal component of the interaction (IPCA1). The computational program for AMMI analyses was supplied by Duarte and Vencovsky (1999). The stability parameters, regression coefficient (bi) and deviation from regression (S²di) were estimated according to Eberhart and Russel (1966). All data were processed and analyzed using Cropstat 7.2 program.

Source of Information: Annual Research Report, Plant Breeding Division, BARI--2014-15

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the yield potentiality and stability parameter, A-9 and A-17 exhibited high yielder as well as stable over all environments. Entry A-10 high yielded with moderate stability but responsive to environments. A-9 ((Pac60/S₃-10×Pac60/S₃-9)×(9MG/S₃-2×9MG/S₃-4)) and A-10 ((Pac60/S₃-10×Pac60/S₃-9)×(9MG/S₃-3×9MG/S₃-4) and A-17 (Pac60/S₃-14×Pac60/S₃-15)×(9MG/S₃-16×9MG/S₃-14) may be selected for large plot observation trial.

Knowledge Management: Report/Proceedings