Genetic dissection of character association and genetic divergence in okra [Abelmoschus esculentus (L.) moench.]
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Date
2012
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CCSHAU
Abstract
The present study entitled “Genetic dissection of character association and genetic divergence in okra [Abelmoschus esculentus (L.) Moench.]” was carried out at the Research farm of Department of Vegetable Science, CCS HAU, Hisar during spring summer season of the year 2011. Analysis of variance studies indicated significant differences among all the genotypes for all the characters under study. Highest mean fruit yield per plant was recorded for the genotype HBT-21 followed by HB-92. Presence of substantial PCV and GCV for plant height, internodal length, branches per plant, fruits per plant, seeds per fruit, test weight and fruit yield per plant indicates greater variation for these traits and thus there is greater scope for further improvement by genetic manipulation. High heritability coupled with high genetic advance as percent of mean for the characters like plant height, internodal length, fruits per plant, test weight and fruit yield per plant suggesting that they can be improved through direct selection due to predominant additive variation. The association studies are indicating the advantage of upgrading the okra genotypes for high fruit yield is possible through direct selection for plant height, fruits per plant and fruit weight. Negative association with earliness characters such as days to first flowering, days to 50% flowering and days to first harvesting is indicating that earliness improves the yield. The high direct effect of days to 50% flowering, fruit weight and fruits per plant on fruit yield per plant is indicating that these are important components of fruit yield per plant. Thus, direct selection for high fruit yield per plant based on these characters would be effective. The involvement of genotypes belonging to cluster-6 and 8, 4 and 8, and 4 and 6 in hybridization would help in achieving novel recombinants. High contribution to the divergence by the characters like internodal length, days to first harvesting, test weight, days to first flowering, fruit diameter, fruits per plant and fruit yield per plant are indicating selection for divergent parents based on these characters will be useful for heterosis breeding in okra.
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Keywords
Fruits, Planting, Genotypes, Yields, Developmental stages, Genetics, Vegetables, Selection, Sowing, Heritability