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Dec 31, 2020Keywords:
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Main Article Content
GENETIC VARIABILITY IN SEED PHYSIOLOGICAL QUALITY AND STORAGE LIFE OF GROUNDNUT (Arachis hypogaea L.) GENOTYPES STORED UNDER AMBIENT CONDITIONS
Abstract
This study, conducted at the laboratory of Plant Breeding and Seed Technology Department, Federal University
of Agriculture, Abeokuta, Nigeria, was carried out to determine genetic variability in seed physiological quality
and storage life of groundnut genotypes stored under ambient conditions. Seeds of 14 groundnut genotypes were
used in the study. Clean seeds of each genotype were packed in a polyethylene bag and the packaged lots were
electrically sealed and placed in a laboratory cabinet under ambient conditions. The packed seed lots were stored
for 150 days (5 months). Seed samples were taken at 0, 30, 60, 90, 120 and 150 days after storage for seed quality
evaluation. The experiment was a 6 x 14 factorial in a completely randomized design with three replications. Data
were collected on rate of germination, seed viability, seedling length, seedling vigour index, seedling fresh
weight and seedling dry weight. Significant differences were observed in all seed attributes evaluated among the
14 groundnut genotypes. Seed storage period significantly influenced each of the six seed quality attributes of the
14 genotypes. Storage period of groundnut should not exceed 3 months (90 days) under ambient conditions in all
the genotypes except Samnut 25 and Samnut 26. Seed quality attributes decreased with increase in storage
periods. Samnut 26 and Samnut 25 were identified to be superior for most of the seed quality attributes evaluated,
while Kwandala local, Kampala spp and Maizabuwa local had the least performance. Storage time had negative
and strong association with all the six quality attributes. Probit modeling result showed that Samnut 26 had the
highest estimated storage life. All the genotypes had a relatively low rate of deterioration except Kwandala with a
slope of 0.4383.
