OLEORESIN YIELDING POTENTIAL OF OPEN POLLINATED PROGENIES OF CHIRPINE (Pinus roxburghii SARGENT)
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Date
2011
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UHF,NAUNI,SOLAN
Abstract
ABSTRACT
The present investigations entitled “Oleoresin yielding potential of open pollinated progenies of Chirpine (Pinus
roxburghii Sargent)” were carried out on the progeny trial of Pinus roxburghii laid out in the in the campus area by
Department of Tree Improvement and Genetic Resources. The laboratory analysis was done in the department of
Forest Products of Dr Y.S.Parmar University of Horticulture and Forestry. Nauni, Solan, (H.P) with the objectives to
evaluate the oleoresin yielding potential and morphological characters of half-sib progenies of chirpine. Trees of 60
progenies were enumerated and abstracted for diameter at breast height (d.b.h). The progenies having more than 30
cm d.b.h were segregated for oleoresin tapping experiment. In total, 22 out of 60 progenies had minimum one tree
above 30 cm d.b.h in at least two replications. Hence, these progenies were selected for stem oleoresin tapping. The
maximum value of oleoresin yield was noted in Kopra-P5 (1527.5 g/season) and lowest oleoresin yield was found
in Chretmansoo-P4 (455.0 g/season). The progenies with yellow (13 B) colour oleoresin were found to be higher
yielder, followed by trees with yellowish-white colour (10 B). Trees with white (155 A & B) colour oleoresin were
found to be poor yielder. Higher oleoresin yielders have been recorded in progenies having dark green (136 A)
needle colour, followed by green (137 B) needle colour. Progenies with yellowish- green (145 A) needles gave
lowest oleoresin yield. The maximum needle length (25.05 cm) and needle thickness (0.780 mm) were observed in
Kopra P5 and Bagthan-PT- black centre, respectively. Whereas, minimum needle length (3.20 cm) and needle
thickness (0.530 mm) were observed in Chretmansoo-P4 and Kaldoo- P10, respectively. For anatomical traits,
Dibkon-P3 and Leda-P5 progenies recorded with maximum number of stomatal rows on round surface. Whereas,
maximum number of stomata per mm of a row was obtained in Bagthan-PT-Black Top. Jubble-PT-Green Centre
was evaluated as best high resin yielder with respect to turpentine content followed by Kopra-P5. Maximum
percentage of rosin was observed in (80.06%) Bagthan-PT Black Base. Correlation studies between oleoresin yield
and different traits of progenies projected highly significant and positive correlation with needle length and needle
thickness whereas, significant and positive correlation was recorded with number of stomata per mm of a row.
Genetic advance (320.28) and Genetic gain (35.51%) were found to be highest for oleoresin yield and heritability
was highest (87.2%) for needle thickness. The factor analysis technique was applied to extract the basic factor
underlying the observed characters of oleoresin yield. The first factor extracted was the combination of oleoresin
yield, needle length, needle thickness and number of stomatal rows on round surface. Second and Third factors
have been number of stomata per mm of a row and bark thickness, respectively. In the multivariate analysis,
characters like needle length, needle thickness, number of stomata per mm of a row had significant effect on the
resin yield; hence oleoresin yield can be predicted on the basis of these 3 characters.
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