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Evaluation of Cotton Germplasm in Bangladesh

M. M. A. Ali
Regional Cotton Research Farm Jagadishpur, Jessore, Bangladesh

S. Begum
Cotton Development Board, Khamarbari, Farmgate, Dhaka-1215, Bangladesh

Abstract/ Executive Summary:

New five genotypes of cotton were evaluated against the commercial CB-9 at Jessore Research Farm during 2009-2010. All the five genotypes produced significantly higher seed cotton yield than CB-9. Lint yield was more than 3000 kg seed cotton yield per ha while the check variety produced only 1648 kg. All the five genotypes showed early flowering and maturity habit than CB-9. Lint yield was more than double in JA-08/C, JA-08/E, JA-08/B and in JA-08/A compared to the check. The highest lint yield was produced by the genotypes JA-08/C which was 1408 kg per ha. Percent GOT was also higher in all the five new genotypes. It Was about 40% in all new genotypes while it was only 30% in CB-9. Cent percent seed cotton was picked in all the new genotypes in 3^rd picking at 220 days. The check variety showed the best uniformity ratio (52.72%) which could be utilized to improve the fiver quality of the high yielding genotypes.

Keywords: Cotton germplasm, Cotton, Cotton genotypes, Seed cotton

Location: Regional Cotton Research Farm Jagadishpur, Jessore, Bangladesh

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Variety and Species

Commodity: Cotton

Objectives:

To develop high yielding and better quality of cotton.

Methodology:

Seeds of cotton genotypes were sown of 13 August, 2009. The trial was conducted in a Randomized Complete Block Design with three replications. Unit plot size was 5 m x 3.6 m and plant spacing was 90 cm x 45 cm. Cow-dung was applied (3t ha^-1) at the time of final land preparation. The nutrient elements such as Nitrogen, Phosphorous, Potassium, Sulphur, Boron, Magnesium Sulphate and Zinc Sulphate were applied in the row at the rate of 23-48-50-14-8-8 and 8 kg ha^-1, respectively as basal dose. The rest of 69 kg N was applied in three equal split at 25, 42 and 55 days after seed sowing as top dressing. Additional amount of Phosphorus, Potassium, Gypsum, Borax, Zinc Sulphat and Magnesium Sulphate were applied at the ration of 36-39-5-2-2 and 2 kg ha^-1, respectively was applied as third top dressing. Normal cultural and pant protection measures were followed. Irrigations were given three times, at the 1^st and 3^rd week of November and 1^st week of December, 2009. Data were collected from middle two rows (5 m x 1.8 m) of each plot to avoid border effects. Ten plants were selected at random from each plot for number of vegetative branches per plant (VB), node number of first fruiting branches (NFB) per plant, number of primary fruiting branches (PFB) per plant, number of secondary fruiting branches (SFB) per plant, plant height at harvest, average weight of seed cotton per boll. Days to 50% flowering and days to 50% boll split were also recorded when 50% plants bare flowers and opened boll, respectively. Yield data were measured as kg ha-¹. Fiber characteristics of the genotypes measured soon after ginning Statistical analyses were performed using MSTAT programme.

Source of Information: Bangladesh Journal of Agriculture, Vol: 36(2), pp:23-27, ISSN: 0253-5408,

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the above discussion, it can be concluded that the genotype JA-08/E was the best to obtain highest seed cotton yield (3308 kg ha^-1). The genotype JA-08/C had the highest GOT (43.40%), the highest single boll weight (6.13), earliness in flowering (48 days) and the highest lint index (6. 99g). All the new genotypes showed earliness in flowering, boll split and seed cotton picking percentage than the check variety, CB-9. However, the best fiber quality produced by CB-9 variety and this character should be transferred by breeding means to new genotypes so that fibre yield and fibre quality can be improved simultaneously.

Knowledge Management: Journal