Genetic variability of photosynthetic traits and their relationship with growth and biomass in willows
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Authors
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S.A. Huse
ASPEE College of Horticulture and Forestry, NAU, Navsari, Gujarat-396450
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N.B. Singh
College of Forestry, Dr. YSPUHF, Nauni, Solan-173 230
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R.K. Anand
KVK (NDUAT), Tissuhi, PO. Marihan, Dist. Mirzapur, U.P.
Keywords:
WUE, photosynthesis, physiological traits, Salix, transpiration, willowAbstract
Twenty three tree willow clones comprising of seven species were studied for variability of photosynthetic traits and their relationship with growth traits during establishment year. Photosynthesis, transpiration and instantaneous water use efficiency (WUE) were determined and the data were further subjected for the estimation of genotypic and phenotypic coefficient of variability (GCV & PCV), heritability and genetic gain (as per cent of mean). The maximum GCV (39.99) was recorded for transpiration, followed by photosynthesis (38.36) and least in case of WUE (19.71). Heritability (h-1) was maximum for transpiration (85.30) followed by photosynthesis (80.00) and WUE (26.55). A positive significant correlation (r= 0.754) was observed between photosynthesis and transpiration, while WUE showed significant negative correlation (r = -0.364) with transpiration and no correlation with photosynthesis. Photosynthesis and Water Use Efficiency showed positive significant correlation with all growth and biomass parameters, whereas transpiration was independent of all growth and biomass traits.
