STUDIES ON DIRECT AND INDIRECT EFFECT ON MORPHOLOGICAL TRAITS OF LANNEA COROMANDELICA CLONES AT NURSERY EVALUATION
Keywords:
Lannea, Clonal Forestry, Genetic Studies, Direct effectAbstract
The present study was conducted with 30 clones of Lannea coromandelica at the Forest College and Research Institute, Mettupalayam. Path analysis is a special use of multiple regressions to help understand and parcel out the sources of variation. In the morphometric traits, the overall correlation observed between two variables will be a function of series of direct and indirect relationships between different variables. Path analysis was shows the direct and indirect effects of characters namely, shoot length, root length, collar diameter, biomass production, root shoot ratio, sturdiness quotient, and quality index on volume index. Root length, collar diameter, biomass production and sturdiness quotient are showed positive direct effect on volume index. Among these traits, biomass production registered the maximum indirect effect on shoot length. Biomass production also registered high values for broad-sense heritability, genetic gain and genotypic coefficient of variation and thus, emerged as an important parameter for selecting superior genotypes.
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