• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2009, Volume: 2, Issue: 1, Pages: 1-9

Original Article

Additive genetic variation in seedling growth and biomass of fourteen Pinus roxburghii provenances from Garhwal Himalaya


Fourteen seed sources of Pinus roxburghii from Garhwal Himalaya were evaluated on the basis of variable and heritable characters in seedling growth and biomass production. The maximum environmental coefficient of variance was observed for root length and minimum for collar diameter. Among different seed sources, the root length oscillated between a minimum of 47.60 cm (in Badiyargarh seed source) to a maximum of 73.73 cm (in Kalimath seed source) after eighteen months of seedling growth. Heritability in broadsense for seedling height was coupled with genetic advance and subsequent gain. The phenotypic and genotypic coefficients of variance were observed for root length, root biomass, root /shoot ratio, seedling height and shoot biomass respectively. The maximum seedling biomass (11.372 g/seedling) was recorded for Thalisain seed source, while minimum (5.962 g/seedling) for Badiyargarh seed source, after eighteen months of growth.

Key words: Additive variance, Chir pine, coefficient of variance, genetic gain, provenance variation. 


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