SCREENING OF MORPHOVARIANTS AND PROPAGATION TECHNIQUES IN Dendrocalamus hamiltonii Nees. IN HIMACHAL PRADESH
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Date
2023-10-03
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Screening of morphovariants and propagation techniques in
Dendrocalamus hamiltonii Nees in Himachal Pradesh“ was conducted at the experimental field of the
Department of Tree Improvement and Genetic Resources, College of Forestry, Dr Y S Parmar University of
Horticulture and Forestry, Nauni,Solan (H.P) during the years 2019-2023. Twelve Maggar bans populations
were selected according to flowering cycle and morphometric traits in four different altitudinal zones in
Himachal Pradesh. Seed and germination parameters, morphometric traits and nursery growth parameters were
analyzed for assessment of population structure genetic diversity. It was concluded that maximum values of all
morphometric traits viz. clump height, clump diameter (26.38 m), number of culm in clump (93.20), internodal
length cm (29.82 cm), number of nodes (67.34), leaf length cm (19.92 cm), culm length (32.02 m), branch
length (42.65 cm), leaf width (1.76 cm) are maximum for S1 (Jukhala) followed by S2 (Sujanpurtira) whereas
biomass with maximum values of (40.84 kg) at S4 (Chabutra) followed by S3 (Kallar ) with identical values
(40.62 kg) which comes in altitudinal zone A1 (300-600 m) and A2(300-600 m) Germination index (88.79 %),
seed length (73.83 %), seed germination (72.87 %) and all morphometric traits have high heritabilities, these
characters could be considered for selection for further breeding and conservation purposes. Maximum mean
values of nursery growth parameters were observed in altitudinal zone 1 and minimum in altitudinal zone 4,
maximum values for collar diameter (1.34 mm), root length (13.54 cm), leaf length (11.57 cm), leaf width (2.63
cm), leaf area (14.37 cm2) were observed in S1 (Jukhala). Assessment of natural regeneration status concluded
that the Pure bamboo very pure bamboo type of bamboo density classes was found in altitudinal zone 1. All
altitudinal zones have culm size of more than 8 cm. Green sound and green damaged type of culm habit
observed in altitudinal zone 1, whereas, green sound and green damaged and dry damaged type of culm habit
was observed in remaining altitudinal zones. Seedlings originated from seed was found to show maximum
survival and propagation through seed was found to be the appropriate method of propagation after
macroproliferation. Macroproliferation yields 16 seedlings from single propagaule in year with 100% survival,
turns out to be a noteworthy propagation technique. Assessment of soil physicochemical parameters concludes
that all soil parameters were nonsignificant among populations across altitudinal zones. Ten individuals are
selected on the basis of cluster based on morphometric parameters. SSR molecular marker characterization
further helps in identification of individual genotypes (identification no 1,2,7,8) that were highly diverse, which
can be used for successful breeding and conservation programs