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Soybean Seed Matured on Different Dates Affect Seed Quality

Author(s): Shad K. Khalil | John G. Mexal | Leigh W. Murray

Journal: Pakistan Journal of Biological Sciences
ISSN 1028-8880

Volume: 4;
Issue: 3;
Start page: 365;
Date: 2001;
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Keywords: Maturity dates | germination | seed infection | soybean

Production of quality seed is one of the major problem in soybean (Glycine max. (L) Mell.,) in tropical countries including Pakistan. Seed quality in soybean, as determined by germination, seed weight and infection by seed pathogens is affected by date of maturity. The objective of this research was to evaluate the quality of soybean seed matured at different temperature. Soybean was planted on January 13, January 16, February 19, March 1, July 10, July 20, July 26 and August 25, 1991 at Agricultural Research Institute, Tarnab, Peshawar, Pakistan. Seeds planted in January, February, and March matured during hot weather conditions (June, July), produced heavier seeds, but had lower germination, and higher infection with seed borne pathogens. Seed planted in July and August reached maturity after hot weather conditions in October and November had ended and exhibited higher germination, little infection with seed borne pathogen, but produced smaller seeds. Seed size was inversely related to germination. Conditions that favor production of large seeds also favor infection with seed borne pathogens and lower germination.
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