Vol. 10, Issue 10 (2021)

Author(s):
Mohanraj K, Umesh Kanna S, Parthiban KT and Kumaran K

Abstract:
Field experiments were carried out at FC&RI Mettupalayam, among the 16 progenies of Toona ciliata M Roem were evaluated for its phenotypic and genotypic coefficient of variance, broad-sense heritability and genetic advance for biometric and biochemical attributes viz. plant height, basal diameter, volume index, chlorophyll ‘a’, chlorophyll ‘b’, chlorophyll a/b ratio, total chlorophyll and carotenoids. Among the biometric and biochemical attributes, the phenotypic coefficient of variation was higher than the genotypic coefficient of variation, which revealed that environmental factors played a major role. Among the biometric characters, the volume index registered high PCV, GCV, broad-sense heritability and genetic advance as percent of mean, followed by basal diameter and plant height. As a result, these parameters could be employed as selection criteria to boost the volume of Toona ciliata. Among the biochemical attributes, chlorophyll ‘a’ registered higher PCV, GCV, broad-sense heritability and genetic advance as percent of mean followed by chlorophyll b, chlorophyll a/b ratio carotenoids and total chlorophyll content. As a result of the current study, variability parameters indicate that this species has a wider scope of genetic improvement.