Genetic Analysis of Six Parental Sesame Genotypes for Yield and Its Attributes in F1 Crosses | ||||
| Journal of Basic and Environmental Sciences | ||||
| Volume 4, Issue 2, April 2017, Page 190-209 PDF (352.6 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jbes.2017.369650 | ||||
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| Authors | ||||
| M. T. M. Abd El-Kader1; R. M. Fahmy2; H. F. A. El-Shaer3; M. A. Abd El-Rahman3 | ||||
| 1Agric. Botany-Genetics Dept., Fac. of Agric., Al-Azhar Univ. Cairo Egypt | ||||
| 2Genetic Resources Res. Sec., Field Crop Res. Inst., Agric. Res. Center, Egypt. | ||||
| 3Agric. Botany-Genetics Dept., Fac. of Agric., Al-Azhar Univ. Cairo Egypt. | ||||
| Abstract | ||||
| To identify superior hybrids and create desirable combinations, a half diallel set involving six parental sesame genotypes was conducted in 2014 season. Six parental sesame genotypes and their 15 F1 crosses were evaluated at Bahteem Research Station in summer season 2015 using randomized complete block design with three replications. Genotypes and its components (parents, hybrids and parents vs. hybrids) mean squares were highly significant for all studied traits. General (GCA) and specific (SCA) combining ability mean squares were highly significant for all studied traits. Also, additive gene action was governed in most studied traits. The best combiners for seed yield/plot and one or more of its components were detected NA.77 (P3) and NA.78 (P4). The highest heterotic effects over mid and better parents were detected in F1 hybrids, NA.80 x NA.35 (P1 xP5) and NA.80 x NA.40 (P1 xP6) for seed yield/plant and seed yield/plot and one or more of its attributes. Significant or highly significant values and high values of the dominance component (H1) were also observed for the most studied trait, indicating that the presence of over-dominance and its confirmed by (H/D)0.5 (more than 1). The effective selection and high narrow sense heritability were detected for days to 50% flowering (62%), days to physiological maturity (77%) ranging from 62 to77. The parents of NA.77 (P3), NA.59 (P2), NA.78 (P4) carried the most dominance genes responsible for the expression of seed yield/plant and plot in contrary NA.80 and NA.35 for seed yield/plot possessed high concentration of recessive genes. | ||||
| Keywords | ||||
| Sesame; Sesamum indicum; Half diallel analysis; Heterosis; Combining ability; Gene action | ||||
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