Journal of Animal and Plant Sciences
J. Anim. Plant Sci. [ISSN 2071 - 7024]
Volume 14(2): 1921 -1930. Published June 30, 2012.
Screening of tropically adapted genotypes of soybean (Glycine max (L.) Merrill) for aluminium stress tolerance in short-term hydroponics.
Ojo, G. O. S.1* and S. A. Ayuba 2
1. Department of Crop Production, University of Agriculture, Makurdi, Nigeria
2. Department of Soil Science, University of Agriculture, Makurdi, Nigeria.
Corresponding author email: *gosojo2001@yahoo.com
Keywords: aluminium activity, aluminium stress tolerance, nutrient solution, Tropically adapted genotypes
SUMMARY
The screening of genotypes is a prerequisite for the identification of aluminium tolerant varieties. Four (4) levels of aluminium activity (0, 5, 50 and 300μMAl3+) were used to screen forty nine (49) genotypes of soybean in hydroponics at the Crop Science Laboratory of the University of Agriculture, Makurdi, Nigeria, with the objective of identifying aluminium tolerant genotypes. The four levels of aluminium activity constituted the main plots while the 49 soybean genotypes constituted the subplots in a split-plot design, with three replications. The soybean seedlings were germinated for 4 days and transferred to nutrient solutions containing the various levels of aluminium activity. The seedlings grew for 3 days (3D) in hydroponics, and data were taken on the primary root length, root dry weight, and shoot dry weight. Highly significant Al, genotype and Al x genotype effects were observed for all the traits studied. Four genotypes, namely TGX 1896–3F, TGX 1844–18E, TGX 1873–16E and TGX 1878–7E were identified as aluminium stress tolerant in hydroponics and recommended for field trial on acid soils of Nigeria.
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