Assessment of genetic variability and character association in okra genotypes for yield and contributing characters

Abstract

A study of genetic diversity in 20 okra genotypes for 22 morphological and agronomic traits (13 quantita- tive and 9 qualitative) was laid out in randomized block design with three replications during 2015-16. The phenotyp- ic and genotypic variances, phenotypic (PCV) and genotypic coefficients of variation (GCV), heritability, genetic ad- vance of the characters were studied. The genotypes demonstrated wide range of variability for all characters. In this study PCV was higher than its corresponding GCV thus revealing the role of environmental factors. High heritability (h2b) was recorded for all characters except for days to first flowering (27.76%) and days to 50% flowering (34.67%) which have moderate values. Genetic advance in per cent of mean was high for all the characters ex- cept moderate for first flowering node (12.88%), fruit length (17.59%), fruit diameter (13.99%) as well as low for days to first flowering (1.69%) and days to 50% flowering (2.28%). The higher value of genetic advance indicates that selection of genotypes on the basis of these characters is desirable. Fruit yield showed positive and highly significant (at 1% level of significance) genotypic association with fruit diameter, number of fruits per plant, average fruit weight and number of seeds per pod. The genotypes, viz. Kashi Kranti, Kashi Satdhari, VROB-159, Punjab-8 and Kashi Mohini were found promising for most of the yield contributing traits. These genotypes could be used further in hybrid breeding programme.

Estimation of Correlation and Path Coefficient Analysis for Quantitative Characters in Okra (Abelmoschus esculentus L. Moench) Genotypes

“…The moderate to lowest (<20) values were found in number of seeds per fruit (7.823), days to 50% flowering (5.749), days to first flowering (5.033), average fruit weight (3.416), number of nodes on main stem (3.394), number of fruits per plant (3.168), length of mature fruit (1.623), number of primary branches (0.742), internodal length (0.66), seed index (0.466), and diameter of fruit (0.21) from (Table3). similar findings were observed in [9].…”

“…The moderate (10-20%) PCV were recorded respectively for number of fruits per plant (16.126), plant height (15.037), average fruit weight (14.609), number of nodes on main stem (11.472) and internodal length (10.845).The low (<10%) estimates of PCV were observed respectively for number of seeds for fruit (9.647), length of mature fruit (9.397), diameter of fruit (7.562), seed index (7.508), days to 50% flowering (6.745) and days to first flowering (6.328) from (Table 3). A similar declaration has been made by Rana et al, [8] and Kumari et al, [9].…”

Influence of okra (Abelmoschus esculentus) genotypes on growth, yield and biochemical traits

“…The days to 50% flowering (r= 0.5294*, P<0.05) was found to be negatively correlated with okra yield as increasing days to 50% flowering significantly reduced the okra pod yield. These results also affirmed to Kumari et al (2017) who reported that delayed flowering reduced the yield traits in okra including canopy photosynthesis, conversion of assimilates to biomass and partitioning of assimilates to grain, and higher yield attributing traits . DOV-88 and Kashi Kranti was found to be best for traits, namely plant height, leaf width, pod diameter, pod weight and okra yield.…”

Determination of Interrelationships and Hierarchical Clustering Analysis among Yield Attributing Biometrical Traits of Okra [Abelmoschus esculentus (L.) Moench] in Coastal Ecosystem

“…Archana et al (2015) found a positive association between fruit length with plant height and no. of nodes plant -1 ; Kumari et al (2017) for average fruit weight and fruit yield plant -1 ; Reddy et al (2013) for no. of fruits plant -1 and no.…”