PJB-2019-254
EFFICIENCY OF ENERGY CONVERSION AS AN INDICATOR FOR DETERMINATION OF THE OPTIMAL GAMMA IRRADIATION DOSAGE FOR MUTATION BREEDING IN POLYPLOID WHEAT
Dr EBEN VON WELL
Abstract
The study was conducted to determine whether the efficiency of energy conversion into growth can be used as an indicator for the determination of the optimal gamma irradiation dosage for mutation breeding in polyploid complexes. To meet this objective, shoot and root growth, mobilisation of food reserves and efficiency of energy conversion were studied in gamma-irradiated wheat Triticum turgidum ssp. durum L. cultivar Orania and T. aestivum L. cultivar Ratel kernels. Kernels were exposed to 50, 150, 250 and 350 Gy and germinated. For most parameters, species and dosage, as well as species by dosage and dosage by time interactions were highly significant. T. aestivum L. cultivar Ratel was highly sensitive for all the parameters in comparison with Triticum turgidum ssp. durum L. cultivar Orania, except for efficiency of energy conversion with a non-significant difference between the species. Full recovery of the efficiency of energy conversion took place up to 150 Gy, with an increase in inefficiency with an increase in dosage from 250 Gy to 350 Gy. Efficiency of energy conversion is more stable than growth parameters to gamma irradiation for the determination of the optimal dosage for plant mutation breeding in different ploidy levels.
To Cite this article:
Download
