Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Comparative Genetic Effect of Dwarfing Genes on Yield and Yield Contributing Traits in Bread Wheat (triticum Aestivum L.)

M. A. Jahan
Department of Genetics, Shah Jalal University of Science and Technology, Sylhet-3114, Bangladesh

M. S. Hossain
Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi-6205, Bangladesh

M. Khalekuzzaman
Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi-6205, Bangladesh

M. M. Hassan
Department of Botany, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Norin 10 based dwarfing genes (Rht1 and Rht2) have been widely exploited for increasing the grain yield in bread wheat (Triticum aestivum L.) by improving partitioning of assimilates to grain. Eight semi-dwarf wheat genotypes having either Rht1 or Rht2 dwarfing genes were compared with a tall control named, Kheri (rht) having no dwarfing genes were evaluated at Rajshahi University, Bangladesh for yield and yield contributing traits. Significant differences in grain yield and yield components were observed in genotypes under study showing the effects of dwarfing genes. Genotype Seri 82 (Rht1) and Kanchan (Rht2) had medium plant height of 75.73 and 72.22 cm respectively, highest number of tillers/plant (7.33 and 7.67), highest number of spikes/plant (6.33 and 6.67) resulted the highest grain yield per plant. Because the dwarfing genes not only provide lodging tolerance but also perhaps pleiotropically affected high yield by allowing more tillers to survive. Number of tillers/plant and number of spikes/plant showed very strong positive correlation with grain yield per plant in all the genotypes. Kheri (rht) with highest plant height (95.17cm) reduced number of tillers/plant (4.00) and spikes/plant (3.67) had the lowest grain yield per plant (3.85g). Aghrani possessed significantly the highest number of grains/spike with medium grain yield/plant (5.94g). The degree of relationship varied from genotype to genotype.

Keywords: Grain yield, Semi-dwarfing genes, Wheat

Location: Genetics and Breeding Department, Rajshahi University, Rajshahi, Bangladesh

Start Date: 00-00-2004

End Date: 00-00-2005

Program Area: Variety and Species

Commodity: Wheat

Objectives:

To analyze the comparative action of dwarfing genes (Rht1 and Rht2) for improving grain yield and Kheri (rht) was used as a control in this case.

Methodology:

Eight semi-dwarf wheat (Triticum aestivum) genotypes namely Inia 66, Sonalika, Kalyansona and Seri 82 having Rht1 dwarfing gene, Kanchan, Aghrani, Sonora 64 and Pavon 76 with Rht2 dwarfing gene and the genotype Kheri (rht) without dwarfing genes were studied in this experiment. Seeds were collected from Regional Wheat Research Centre (RWRC), BARI, Rajshahi,Bangladesh and were seeded at an experimental farm of Genetics and Breeding Department, Rajshahi University in the Rabi season of 2004-05. The genotypes were grown in single row plot according to randomized completely block design (RCBD) with three replication for this agronomic study. Recommended agronomic practices were followed as and when necessary and the data of all the plants were recorded. Ten plants at random from each replication were selected for this agronomic studies. The following five characters were studied. 1. Plant height : The length of the main tillers at maturity were measured in cm from the ground level to the tip of its terminal spikelet excluding awns and the average was taken. 2. Total number of tillers/plant : Total number of tillers/plant were measured at maturity stage. 3. Total number of spikes/plant : Total number of spike bearing tillers were counted from the sample plant and were averaged per plant. 4. Total number of grains/spike : Total number of grains were counted from main spike of each sample plant and then average was taken. 5. Grain yield/plant : Total grains of the sample plants was weighted in gram and the average was taken. Data were statistically analyzed and to distinguish the significant differences between two different means, Least Significant Differences (LSD) were estimated. Mean square of analysis of variances were worked out to test the significance.

Source of Information: Progress. Agric. 18(2) : 49-55, 2007 ISSN 1017-8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Significant differences in grain yield and yield components were observed in genotypes under study showing the effects of dwarfing genes. Genotype Seri 82 (Rht1) and Kanchan (Rht2) had medium plant height of 75.73 and 72.22 cm respectively, highest number of tillers/plant (7.33 and 7.67), highest number of spikes/plant (6.33 and 6.67) resulted the highest grain yield per plant. Because the dwarfing genes not only provide lodging tolerance but also perhaps pleiotropically affected high yield by allowing more tillers to survive. Number of tillers/plant and number of spikes/plant showed very strong positive correlation with grain yield per plant in all the genotypes. Kheri (rht) with highest plant height (95.17cm) reduced number of tillers/plant (4.00) and spikes/plant (3.67) had the lowest grain yield per plant (3.85g). Aghrani possessed significantly the highest number of grains/spike with medium grain yield/plant (5.94g). The degree of relationship varied from genotype to genotype.

Knowledge Management: Journal