Studies on Seed Storability and varietal Characterization in Wheat Genotypes
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Date
2012
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UAS, Dharwad
Abstract
The storage potential of four wheat genotypes viz., DWR-162, DWR-1006,
UAS-304, UAS-415 was studied with ten seed treatments with botanicals and
chemicals packed in cloth bag and stored under ambient conditions from May 2011-
February 2012. DWR-162 recorded significantly higher seed germination, lower seed
infestation, higher 100 seed weight, lower loss in seed weight, higher field emergence,
higher seed protein content, lower seed moisture content, higher seedling vigour index
and lower electrical conductivity at the end of 12 months of storage. Irrespective of
genotypes, seeds treated with vitavax @ 3g/kg of seeds recorded significantly higher
seed germination (85.82%), lower seed infestation, higher 100 seed weight, lower loss
in seed weight, and higher field emergence, higher seed protein content, lower seed
moisture content, higher seedling vigour index, and lowest electrical conductivity of
seed leachate followed by seeds treated with sweet flag rhizome powder and
bleaching powder at the end of twelve months of storage. As per Minimum Seed
Certification Standard, DWR-162 maintained satisfactory germination (87.30%) upto
10 months and seeds treated with vitavax (85.82%) upto 12 months of storage. The
interaction combination of DWR-162 seeds treated with vitavax powder recorded
higher seed germination and other seed quality parameters.
Varietal characterization of 20 wheat genotypes was carried out based on seed
coat colour, seed shape, test weight, brush hair length, coleoptile anthocyanin
colouration, plant growth habit, foliage colour, flag leaf attitude, days to ear
emergence, plant waxiness, flag leaf waxiness of sheath, blade and ear, flag leaf
length and width, plant height, ear density, ear colour, awn length, awn colour and
awn attitude. The seeds were also differentiated with chemical tests like phenol,
NaOH and KOH, seedling growth response to GA3 and 2,4-D. Based on the colour of
the solution, phenol test was found to be very useful for differentiating genotypes