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Variation of Grain Growth of Wheat Cultivars

S.K. ADHIKARY
Department of Botany, University of Rajshahi, Rajshahi-6205, Bangladesh.

M.Z. ALAM
Department of Botany, University of Rajshahi, Rajshahi-6205, Bangladesh.

N.K. PAUL
Department of Botany, University of Rajshahi, Rajshahi-6205, Bangladesh.

Abstract/ Executive Summary:

An experiment was carried out to study the grain growth pattern of wheat (Triticum aestivum L.) cultivars and to find out association and linear regression of spike weight and grain weight with time. Spike characters indicated that cultivar differences were significant in all the cases with a few exceptions. Linear regression and correlation coefficients revealed that the association between both spike weight and grain weight with time were highly positively significant among the cultivars but their regression coefficients were nonsignificant.

Keywords: Grain growth, Correlation, Regression, Wheat

Location: Department of Botany, University of Rajshahi, Bangladesh

Start Date: 00-11-2003

End Date:

Program Area: Variety and Species

Commodity: Wheat

Objectives:

To find out variability of different phases of grain growth of wheat (Triticum aestivum L.) cultivars in the northern region of Bangladesh.

Methodology:

The experiment was conducted in the research field of the Department of Botany, University of Rajshahi, Bangladesh. Eight cultivars of wheat (Opata, BL 1183, C 306, BAW 452, BAW 171, Pavon 76, Kanchan and Barkat) were grown in a randomized complete block design with three replications. Each replication plot was 8 m long and 8 m wide. The field was prepared after repeated ploughings. Before sowing, basal doses of nitrogen (80 kg N /ha), TSP (40 kg P₂O₅ /ha) and MP (40 kg K₂O /ha) were added and were mixed with the soil. The seeds were sown on 10 November 2003 at the rate of 50 kg/ha. The row to row and plant to plant distances were 20 cm and 10 cm, respectively. Spikes were harvested from the experimental field on 10 January 2004 onward. Before harvest, some spikes were tagged at different days of anthesis for each cultivar and harvests were taken at an interval of 7 days. Six harvests were taken during the period of experimentation. Six spikes of main tillers were cut (per replication = 2 spikes) per cultivar at each harvest and they were dried in an oven at 85°C for 24 hours. After drying, the following characters were recorded: Spike weight, number of spikelets/spike, number of grains and grain weight. Statistical analysis was done accordingly for almost all the characters by a statistical package named Irristat Version 3.1 to show the significant difference among means. Linear regression analysis was carried out according to Gomez and Gomez (1984) with the help of Microsoft Excel data analysis tool pack.

Source of Information: Bangladesh J. Agril. Res. 34(3) : 351-359, September 2009, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the present investigation, it is observed that spike weight and grain weight had close relation with time. Therefore, independent and dependent variables were closely related each other and changed with time. Among the cultivars, wide variation was observed for all the spike characters at different days after anthesis.

Knowledge Management: Journal