Abstract
The study was conducted to estimate the variability for the juvenile growth and bio-chemical parameters of Toona ciliata among the altitudinal provenances, zones and seed sources. Collar diameter and seedling height differ significantly for different seed sources during first and second year of growth, whereas these characters were significantly different among altitude, zone and seed sources during second year of growth. Bio-chemical parameters viz. RNA, DNA and soluble protein differ significantly among the season, altitude, zone and their interaction. Seed sources with high RNA and soluble protein seems to be responsible for better juvenile growth of Toona ciliata.
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