Variation in quality and physical characteristics of seed of 10 soybean (Glycine max (L.) Merr.) genotypes
2001
Arom Sripichit(King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricultural Technology. Department of Plant Production Technology)
Difference in genotype of soybeans (Glycine max L.) Merr.) may result in variation of seed germination and vigor. The variation in seed quality and some physical characteristics of seed of 10 soybean genotypes and also the relationships among them were determined. Plants were grown in rainy season of 2000 and harvested when pods became yellow (physiological maturity). After the seed moisture had been dried to about 11 percent, seed quality, seed leachate and physical characteristics of seed were evaluated. The seed quality was obtained by standard germination test and vigor tests including field emergence and seedling length. Seed leachate was tested by electrical conductivity and imbibition. The physical characteristics of seed were measured by seed weight (seed size) seed shape (eccentricity value), wight and percent of seed coat and hard seed percentage. The results showed that seed germination of 10 soybean cultivars/lines had a wide variation from 50 to 100 percent. Lines with high germination (more than 80 percent) had a tendency to accompany with high seed vigor and low in seed leachate as well as water uptake. Observed correlation coefficients indicated a tendency for higher seed quality to be associated with higher percent of seed coat and slower rate of imbibition. Therefore, seeds with thicker seed coat would result in delayed moisture absorption. This may be the case of producing good quality of soybean seeds.
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