Indian Society of Genetics & Plant Breeding
Presence of hard seeds in seed lots reduces the seedling
emergence percentage in field leading to non-uniform and
lowered plant population and uneven maturity. Seed
hardness, characterized by no water imbibitions, is
controlled by both genetic and environmental factors. The
occurrence of hardseededness in 51 mung bean genotypes
grown in the field in two seasons (summer and Kharif,
2016) was confirmed by standard germination test. The
seed size, 100 seed mass and seed density of identified 20
hard seed and 8 non-hard seed genotypes out of 51
genotypes have been recorded. Hardseededness among
the genotypes in original seed lot of Kharif, 2015 ranged
from 3 to 52% with a mean of 18.1%. It ranged from 2% to
11% and 3% to 46%, with a mean of 5.42% and 18.35% in
summer, 2016 and in kharif, 2016, respectively. In the seed
lots of genotypes grown in kharif, 2015 the seed size of
selected hard seed genotypes ranged from 3.69/2.90mm (L/
W) to 4.58/3.31mm (L/W) and in selected non-hard seed
genotypes it ranged from 4.01/2.46mm (L/W) to 4.83/3.48mm
(L/W). The 100 seed mass in selected hard and non-hard
seed genotypes ranged from 2.69 to 4.13g and 2.39 to 3.94g,
respectively, in kharif, 2015. In summer, 2016, it ranged from
3.57 to 4.75g and 3.05 to 5.58g in selected hard seeded and
non-hard seeded genotypes, respectively. A higher seed
density of hardseeded genotypes was recorded in
comparison to that of non-hard seeded genotypes. In
summer, 2016 the genotypes like Pant M-5, GM-4, IPM 02/3,
AKM 9904, PS-16, SM-11/75, HUM-12, IPM 205/7 showed
lower occurrence of per cent hard seeds. The broad sense
heritability estimates for the hardseededness in the kharif
and summer season ranged between 0.96 to 0.98 and 0.67,
respectively. A larger seed size in genotypes grown in
summer season showing lower occurrence of hard seeds
suggest that the summer season is the desired season for
quality seed production of genotypes with higher
percentage of hard seeds.
Keywords: Mung bean, seed germination, hard seed, seed size, seed mass and density, heritability
Year: 2018
Volume: 78
Issue: 3
Article DOI: 10.31742/IJGPB.78.3.7
Print ISSN: 0019-5200
Online ISSN: 0975-6906
Debashis Paul, S. K. Chakrabarty, H. K. Dikshit and Y. Singh info_circle
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