Studies on genotypic and phenotypic variations in Dalbergia sissoo Roxb
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Date
2016
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Publisher
CCSHAU
Abstract
The present investigation entitled “Studies on genotypic and phenotypic variations in
Dalbergia sissoo Roxb.” was carried out in three broad experiments viz; extent of phenotypic variation
in various geographical sites, provenance evaluation for seed storability and loss of vigor during
storage and provenance cum progeny testing. Substantial amount of variability was observed for total
tree height, diameter at breast height, clean bole height, unforked height, straightness and crown
diameter in natural populations of six diverse provenances viz; Ferozpur from Punjab, Reasi from
Jammu and Kashmir, Hanumangarh from Rajasthan, Meerut and Basti from Uttar Pradesh and Udham
Singh Nagar from Uttrakhand. The maximum variability was observed for unforked height followed by
straightness. However, on the overall basis, maximum variability was observed in Udham Singh Nagar
from Uttrakhand. The considerable variations in seed viability and germination percentage among
different provenances were also observed. Germination percentage immediately after collection was
quite high. Significant differences were recorded for germination per cent among the different
provenances. The germination per cent immediately after collection ranged from 82.6% in Meerut
provenance to 91.2% in Udham Singh Nagar provenance with an average of 86.6 per cent. The
germination per cent after storage of 18 months varied from 75.3% in Meerut provenance to 80.4% in
Hanumangarh provenance with an average of 77.8 per cent. The reduction in germination per cent after
storage of 18 months was found minimum in Hanumangarh provenance. The mean sum of squares due
to progenies were highly significant for all the characters viz., total height, basal diameter, unforked
height, clear bole height, root length, fresh weight, dry weight, total dry biomass, plant straightness,
root weight and shoot weight which indicated the presence of ample genetic variation for all the
characters under study. The magnitude of phenotypic coefficient of variation was higher than the
corresponding genotypic coefficient of variation for all the characters. Heritability estimates in broad
sense were more than 65% for important growth characters like, total height, basal diameter, unforked
height and clear bole height. Index score analysis carried out in sixty progenies of Dalbergia sissoo
from six provenances revealed that the progeny of BST-59 from Basti provenance, FZP-1, FZP-4 and
FZP-5 from Firozepur provenance were found best with highest index score of 32 followed by progeny
of BST-58 from Basti provenance with index score of 31 and the progenies of FZP-10 from Ferozpur
provenance, MRF-33 from Meerut provenance, USN-48 from Udamsingh Nagar provenance and BST-53 and BST-60 from Basti provenance with index score of 30. Progenies of FZP-4 from Ferozpur,
BST-60, BST-59 and BST-57 from Basti provenance were found promising for total height and basal
diameter. Based on growth performance of progenies, Basti provenance was found best followed by
Ferozpur provenance. Seed sources from Basti and Ferozpur were found superior.
Description
Keywords
Cotton, Yields, Sowing, Heterosis, Crossing over, Planting, Biological phenomena, Hybrids, Beverages, Economics