STUDIES ON GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE IN AFRICAN MARIGOLD ( AN MARIGOLD (Tagetes erecta agetes erecta agetes erecta L.)

Abstract

ABSTRACT
The present investigation on variability, heritability and genetic advance in seventeen African marigold genotypes
was carried out for plant growth and flower yield. The vegetative and flowering characters varied significantly
among the genotypes. The highest value of GCV and PCV was observed for dry flower weight per plant (37.0%
and 37.46%, respectively). High heritability was observed for xanthophyll content (99.9%), followed by dry
flower weight per plant (97.53%). Plant height (95.0%), number of leaves per plant (94.8%).The estimates of
genetic advance were comparatively maximum for number of leaves per plant (80.71%) followed by plant height
(39.67%). For all the parameters, the estimates of phenotypic coefficient of variance (PCV) was higher as compared to genotypic coefficient variance (GCV), indicating the role of environmental factors for the expression of
these characters. This suggests the presence of sufficient genetic variability can be exploited by practicing pure line
selection