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Evaluation of Double Top Cross Maize Hybrids

M. Hoque
Scientific officer
Plant Breeding Division RARS Jamalpur,BARI

A. Islam
Scientific Officer
Plant Breeding Division RARS Hathazari,BARI

K. Sultan
Senior Scientific officer
Plant Breeding Division RARS Ishurdi,BARI

Abstract/ Executive Summary:

Four double top cross maize hybrids along with four check varieties were evaluated at 4 locations viz. RARS Jamalpur, RARS Ishardi, RARS Hathazari and RARS Rahmatpur of Bangladesh to study the performance of the hybrids and to select better performing one(s). Mean sum of square obtained from combined analysis of variance showed the presence of genetic variability among the genotypes and environment for all the characters under study. From the overall mean and other desirable characters three entries DTC07, DTC09 & DTC14 were found promising across locations.

Keywords: Maize, Hybrid, Evaluation, Double top cross and Yield

Location: Jamalpur, Ishardi, Hathazari and Rahmatpur

Start Date: 15-11-2007

End Date: 12-04-2008

Program Area: Variety and Species

Commodity: Maize

Objectives:

It was observed that double top cross hybrid are more adaptive and seed is cheaper than any kind of conventional hybrid. Therefore, the present study was undertaken to evaluate some BARI developed double top cross hybrids

Methodology:

Four double top cross hybrid and four local checks viz. BM-7, BHM-3, Pacific 11 & Pacific 60 were evaluated at RARS Jamalpur, RARS Ishardi, RARS Hathazari and RARS Rahmatpur. The experiment was laid out in RCB design with 3 replications. The unit plot consisted of was 2 rows of 5m long, Row to Row 75 cm and plant to plant 20cm. One healthy seedling per hill was kept after proper thinning. Fertilizers were applied @ 250, 120, 120, 40, 5 and 1kg/ha of N, P₂O₅ K₂O, S, Zn and B respectively. All intercultural operations were done as and when necessary. Data on days to 50% tasseling, silking and maturity were recorded on whole plot basis. Ten randomly selected plants were used for recording observations on plant and ear height. All the plants in two rows were considered for plot yield. Combined analysis was done for grain yield, days to tasseling, days to silking , days to maturity, plant height and ear height using the MSTATC program.

Source of Information: Annual Research Report 2007-08, Plant Breeding Division, BARI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Tk. 10,000/-

Total Budget (Tk.) : Tk. 10,000/-

Achievement/Findings:

It was observed that double top cross hybrids are significantly better for yield and other characters across the environments. Mean grain yield across locations showed that DTC 07, DTC 09 and DTC 14 produced statistically identical yield with the checks, where days to tasseling, silking & maturity were minimum in DTC 10. Considering the yield potentiality, earliness and other desirable characters entry DTC 07, DTC 10 & DTC 14 were found promising across locations.

Knowledge Management: Report/Proceedings