Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 53: 3812 - 3820. Published May 29, 2012.
Screening of tropically adapted soybeans for aluminium stress tolerance in sand culture.
Ojo, G. O. S.1* and S. A. Ayuba2
1. Department of Crop Production, University of Agriculture, Makurdi, Nigeria
2. Department of Soil Science, University of Agriculture, Makurdi, Nigeria
RESUME
Objective: To identify tropically adapted soybean genotypes tolerant to aluminium toxicity in sand culture.
Methodology and results: The experiment was conducted at the Teaching and Research Farm of the University of Agriculture, Makurdi, Nigeria, in 2003 and 2004. The treatment was a factorial combination of 49 soybean genotypes and two levels of aluminium activity (zero and 450µMAl3+) laid out in a randomized complete block design and replicated three times. The soybean seeds were planted in the sand and watered with deionized water for seven days. Thereafter, two levels of nutrient solutions containing 0µMAl3+ or 450µMAl3+aluminium activity were used to water the seedlings for the next 18 days. Plants were harvested at 25DAP and data were recorded on the root dry weight, shoot dry weight and relative root surface area. Highly significant differences were observed for Al, genotype, Al x genotype and Al x genotype x year interaction effects for all the measured traits.
Conclusion and application of findings: the study identified six genotypes, TGX 1897 – 17F, TGX 1878–7E, TGX 1893–7F, TGX 1894–3F, TGX 1896–3F, and TGX 1844–18E as aluminium tolerant in sand culture. These genotypes could further be explored in the development of acid/aluminium tolerant variety through genetic manipulations and testing in multi-locational field trials on the acid soils of Nigeria.
Keywords: aluminium activity, genotype, aluminium stress tolerance, sand culture, screening
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