2011 Volume 14 Issue 2 Pages 156-163
We screened acid soil-tolerant wild soybean (Glycine soja Sieb. and Zucc.) accessions and evaluated their agronomic and tolerant performance under acid sulfate soil (ASS) conditions. Only three accessions, J-13, J-19 and J-55, among 381 G. soja accessions obtained from G. soja Germplasm Collection of Japan, were identified as having strong tolerance by the acid soil toxicity score (ATS) at soil pH 3.3. These three tolerant G. soja accessions showed significantly lower aluminum (Al), iron (Fe) and manganese (Mn) contents in the aboveground part than the intolerant ones in 0.25 lime requirement (LR) conditions (pH 3.8). Aboveground dry matter weights (DW) and seed yields of three tolerant G. soja accessions, except seed yield of a tolerant accession J-55, were also significantly higher than intolerant ones under the 0.25 LR condition. This clearly indicates that lower contents of toxic mineral in the ASS-tolerant G. soja led to higher macro-nutrient uptake, DW, and seed yields. We conclude that the three tolerant G. soja accessions identified in the present study possess high levels of tolerance to the soil acidity and Al-excess soil conditions, and could be valuable genetic resources for soybean improvement programs.
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