Impact of accelerated ageing process on viability of egyptian cotton seeds [electronic resource]

Includes bibliographic reference

Genetic analysis was employed to investigate the influence of aging treatments on cottonseed viability. The seeds of 36 genotypes were artificially aged at 40 ℃ and 95–100 % relative humidity for control (T0) and accelerated ageing treatments, T1= 24 hours, T2 =48 hours and T3 =72 hours). Genotypes mean squares were significant for most traits under control and accelerated aging, except electrolyte leakage and seed imbibing % at accelerated aging conditions. The electrolyte leakage and seed imbibing % were increased with the increasing of aging stress. Increased electrolyte leakage with aging confirmed the inferior quality of aged seeds. However, germination % from T2 to T3, root fresh weight and shoot fresh weight from T1 to T3 were decreased with the increasing of aging stress. The decreases in seedling growth traits by accelerated aging may be a result of progressive loss of seed viability and vigor. Seed index had positively correlated with electrolyte leakage at second treatment and germination %. This indicate that higher seed index may improve electrolyte leakage and seed imbibing % (reduce the ability to both leakage into solution and absorb humidity) under severity storage condition, this relation help to understand the ability of cottonseed storage. Seed imbibing % exhibited negative and significant association with seed germination at second ageing. The genotypic correlations of seed index with other seed quality changed from control (+) to accelerated aging (-), indicating the high effect of aging treatment on the relation between these traits except for germination %.

Summary in Arabic