EVALUATION OF GENOTYPIC VARIATION FOR GERMINATION AND VIGOUR IN A FEW SELECTED CAPSICUM SPECIES
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Date
2012-09-12
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University of Agricultural Sciences GKVK, Bangalore
Abstract
The present study was conducted at Department of Seed Science and Technology,
GKVK, Bangalore during 2011-12 to know influence of maturity stages on seed quality of ten
chilli genotypes viz., Bhut Jolokia, Merkera Local, Sweet Baccatum, Gandhari, Biligiri Local,
Majjige Menasu, Chinense Habanero, Hot Cherry, Cherry pepper and Shivani belonging to
Capsicum chinense, C. frutescence and C. annuum. The results revealed that fruits harvested at
red ripe stage and subjected for 20 days post-harvest ripening (M4) has recorded higher seed
quality parameters viz., 1000 Seed Dry Weight (6.95g), Germination (66%), Seedling Length
(9.9cm), SVI-I (748), TDH activity (1.314), α-Amylase activity (34.9μg maltose ml-1min-1) and
low EC (1.743dSm-1). However, genotypic variation for seed germination and seedling vigour
were evident that viz. Bhut Jolokia, Merkera Local, Chinense Habanero and Cherry pepper
recorded consistent non-uniformity for germination.
Further, non consistent genotypes with germination were subjected for pre-sowing seed
treatments viz., running water, pre chilling, GA3, KNO3 and Ethrel. Seeds treated with
GA3@500ppm recorded significantly higher germination (96%), SVI-I&II (1310 and 146), speed
of emergence (25.4), TDH activity (2.796), field emergence (88%) and less days to 50 per cent
emergence (5.17 days) compared to untreated control. Running water treatment also induced
uniform germination and enhanced seed quality attributes.
Among 10 genotypes Sweet Baccatum and Chinense Habanero showed steady decline
and significantly higher seed quality parameters viz., germination (43 and 38%) seedling length
(12.60&10.00cm), SVI-I (765&393), TDH (0.565&1.432) and lower EC (5.245&5.910dSm-1)
respectively, after nine days accelerated ageing
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Keywords
sowing, developmental stages, genotypes, germinability, fruits, harvesting, chillies, drying, pepper, harvesters