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HETEROSIS AND COMBINING ABILITY IN OKRA [Abelmoschus esculentus (L.) Moench]

KrishiKosh

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Title HETEROSIS AND COMBINING ABILITY IN OKRA [Abelmoschus esculentus (L.) Moench]
 
Creator Sujit Kumar
 
Contributor Dr. Anand Kumar Singh
 
Subject Okra, Heterosis and Combining Ability
 
Description The present investigation titled “Heterosis and combining ability in okra [Abelmoschus esculentus (L.) Moench]” was conducted at Vegetable Research Farm, Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during Spring-Summer and Rainy season of 2012. For generating the experimental material 12 diverse parents viz. Larm-1(P1), IC-282280 (P2), IC-282337 (P3), IC-128891 (P4), IC-111527 (P5), EC-329380 (P6), IC-282279 (P7), VRO-3 (P8), IC-329422 (P9), IC-18537 (P10), HRB-55 (P11), IC-43132 (P12) were crossed in diallel fashion (excluding reciprocals). The experiment was conducted in randomized block design with three replications. The materials for the present study comprised 78 entries including twelve parents and their sixty-six hybrids. Each one of 78 genotypes (12 parents and 66 hybrids) was grown in 6 rows of 3 meter length with row to row spacing of 60 cm and plant to plant spacing of 30 cm, accommodating 10 plants in rows. The uniform and recommended agronomic practices were applied to raise the healthy crops and observations were taken during the course of investigation. The observations were taken for 17 characters viz. days to first flowering, days to 50% flowering, node at which first flower appears, plant height (cm), number of branches per plant, internodal distance (cm), number of pods per plant, pod length (cm), pod diameter (cm), pod weight (g), dry weight of pod in per cent, number of seeds per pod, seed weight per pod (g), 100 seed weight (g), seed yield per hectare (q/ha), pod yield per hectare (q/ha) and plant dry weight in per cent. Out of 66 crosses, considering five best crosses for sca effects identified for 17 characters, only 11 cross out of 66 crosses were the produce of low × low gca effect and the remaining crosses had at least one parents with high sca effects, suggesting thereby the importance of parents having high gca in the production of crosses expected to give high sca effects. However per se performance of the best crosses for various characters suggest that in most of the cases the sca effect of the cross combinations did not appear to be directly related to the per se performance. Therefore, per se performance along with sca effects should be considered for evaluating the superiority of a cross, although the former may be important where development of F1 hybrid will be of ultimate objective. The heterosis breeding programmes can more profitably be employed for that characters which are predominantly governed by non-additive gene action. The result of combining ability revealed that all seventeen characters showed the preponderance of non-additive gene action in their expression. Therefore, all specified characters can be reliably taken up for heterosis breeding programme in okra. The cross combination P2 × P6 recorded the height magnitude of per se performance, sca effects and heterobeltiosis and standard heterosis for the most desirable character yield as well as yield attributing characters which may be taken for further breeding programme.
 
Date 2016-09-09T21:31:19Z
2016-09-09T21:31:19Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76336
 
Language en
 
Relation M-0007;
 
Format application/pdf
 
Publisher Institute of Agricultural Sciences, Banaras Hindu University