IDENTIFICATION OF GENETIC VARIABILITY PRODUCED THROUGH RADIATION IN OKRA. | ||||
| Journal of Agricultural Chemistry and Biotechnology | ||||
| Article 1, Volume 29, Issue 12, December 2004, Page 7451-7464 PDF (4.49 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jacb.2004.242888 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Soher E. A EI-Gendy1; Z. M. EI- Diasty2 | ||||
| 1Horticultural Res. Inst., Vegetable Research Station (Mansoura) ARC, Egypt. | ||||
| 2Genetics Dept. Fac. of Agric. Mans. Univ., Egypt. | ||||
| Abstract | ||||
| The dry and soaked seeds of four parental varieties of Okra, six Fl hybrids and six F1r hybrids among them were treated with gamma-rays emitted from cobalt-60 source. The used doses of irradiations were zero (control), 5, 10 and 15 kr of gamma irradiation. The performances of studied economical traits were evaluated in the irradiated generations. It was observed that the medium doses of radiation caused increasing variability among genotypes for most studied traits. The results also cleared the presence of heterosis for most studied traits. The results indicated that medium dose (10 Kr.) increased the vigoursity estimated from the mid-parents for some studied traits specially in soaked condition. The results also cleared that the dose of 10 kr exhibited positive and economical values of heterosis versus the better parent. It could be also obtained that all varieties and hybrids showed different responses to doses of gamma rays. The results also indicated that the magnitudes of non-additive genetic variances including dominance (cr20) were larger than their corresponding additive genetic variances (cr2A) for most of studied traits. In the same time, the obtained values of additive genetic variances (cr2A) indicated the importance of (cr2A) for the inheritance of that traits and could not be neglected. The results also indicated the presence of a quite values of heritability in broad and narrow senses for most studied traits. Therefore, the possibility of improving Okra traits through selection programs within segregating generations is available to produce superior Fl hybrids. | ||||
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