Diversity analysis of phenotypic traits in okra (Abelmoschus esculentus L. Moench)

Abstract

It is necessary to obtain cultivars which provide high yield by exploiting desirable traits from wild genotypes of okra (Abelmoschus esculentus L. Moench). Okra genotypes were evaluated for phenotypic traits during 2018. High genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) occurred for nine traits and narrow differences between GCV and PCV indicated the influence of environment was negligible. High estimates of heritability, coupled with moderate to high genetic advance as a percent over mean, were recorded for nine traits. Thousand seed weight had a positive, significant, correlation with yield per hectare. Plant height and number of fruits per plant had direct and positive effects towards the yield per hectare The principal component analysis indicated the first 3 principal components contributed 80.517% of total variation among traits describing genotypes. Cluster analysis indicated hybridization of genotypes among inter-cluster I and II could be used to develop stable, uniform varieties in diverse climatic conditions. EC359637 and IARI Selection 2 are distantly placed and can be used for overall improvement in further crop breeding.

Estimation of genetic variability in diverse germplasm of okra [Abelmoschus esculentus (L.) Moench.]

“…days to 50% flowering, plant height, number of nodes on main stem, fruit length, number of fruits per plant, fruit weight, number branches per plant, inter nodal length and fruit yield per plant. These outcomes were in accordance with the findings of the earlier workers (Dhankhar and Dhankhar 2002;Singh and Singh 2006) in okra. However, significant variation present in the disease incidence at different growth stages of plant i.e at 30, 45, 60 and 75 days after sowing.…”