Vol. 11, Issue 8 (2022)

Author(s):
Amrutha Unni M, Beena Thomas, Roshin Mariam George and Arya Gopinath MP

Abstract:
Twenty genotypes of Dendrobium having cut flower qualities with desirable traits and widespread market acceptance were evaluated using completely randomized design. The analysis of variance revealed that significant difference exists among the parental genotypes with respect to the majority of biometric characters studied. Vegetative characters such as plant height, number of leaves per shoot, thickness of the shoot, internodal length, length of the leaf, width of the leaf and thickness of leaf exhibited the highest estimates of variance at both genotypic and phenotypic levels. The thickness of leaf exhibited the highest GCV (66.16%) and PCV (69.54%). High heritability coupled with high genetic advance was recorded for plant height, number of leaves per shoot, number of aerial roots, length of aerial roots, thickness of the shoot, internodal length, length of the leaf and leaf area which indicated that these traits were controlled by additive gene action. High heritability (>60%) combined with high genetic advance (>20%) was exhibited by majority of the characters under study indicating additive gene action for these characters and it provides a scope for further improvement of these traits in advance generations.