Combining Ability and Genetic Analysis of Morphological and Yield Related Traits in Abelmoschus esculentus L.
Combining Ability and Genetic Analysis of Morphological and Yield Related Traits in Abelmoschus esculentus L.
Syed Majid Rasheed1*, Tauseef Ali1, Saad Jan1, Faiz ur Rehman2, Muhammad Ali Shah3, Zahid Hussain1 and Abdul Waheed4
ABSTRACT
The present study was conducted to assess combing ability and genetic analysis in Okra. Twenty-eight okra genotypes (5x5 diallel crosses) and checks were screened for high yield and early maturity in a randomized complete block design. Highly significant differences were observed for most traits, except stem diameter and marketable fruit diameter. Among genotypes, G10 flowered earliest (41.5 days), G22 had longest internodes (3.59cm), G16 had heaviest fruits (9.65g), and G14 had longest and thickest marketable fruits (13.8 cm, 1.74cm). Combing ability analysis revealed that non-additive gene action was involved in controlling all traits. Non-additive gene action was important for all traits, and P2 and P3 were good general combiners. G8 and G14 were superior crosses due to high per se performance and significant SCA effects. Heritability analysis suggested that the selection of the studied traits should not be based on phenotypic performance. A heterosis study revealed that most of the crosses outperform the checks, and hence could be used in future okra breeding programs. The estimated inbreeding depression revealed that the majority of the traits showed negative inbreeding depression due to selfing, thus least affected by selfing. Thus from our study G8, G14 and G23 could be identified as the best-performing crosses for yield-associated traits. Hence should be involved in a variety of development programs to improve the quantitative and related traits of Abelmoschus esculentus L.
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