Evaluation of a soybean (Glycine max (L.) Merr.) seed quality analysis method for the selection of deterioration resistant genotypes
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Abstract
Different methods of soybean seed (Glycine max (L.) Merr.) quality have been studied, with the purpose to find a simple and objective method that can be practically used in a program of genetic improvement to select cultivars resistant to seed deterioration. Different types of soybean seeds were exposed to different levels of artificial deterioration (72 and 96 hours) in an accelerated ageing chamber with high humidity (100%) and high temperature (40 °C), to simulate the deterioration that occurs on the field during the maturity, harvest, and post-harvest periods. The deteriorated seeds were evaluated with the traditional Standard Germination Test, and the results were compared with the Electric Conductivity and Gravity Tests, as alternative methods. According to the results, both alternative methods resulted in being simple and easy to use in a genetic improvement program. The Electric Conductivity Test resulted in being the most useful for its speed and a better correlation with the Standard Germination Test. On the contrary, the Gravity Test, even though it detected different levels of deterioration, showed a lot of variability and did not have a good correlation with the Standard Germination Test.
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References
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