Abstract

GOMEZ, Edgar et al. Morphological Evaluation Of Generations M1 And M2 Of Triticum Aestivum L. (Wheatgrain); Use Of Gamma Radiation, Its Effects On Absortion Of Nutrients And Minerals. Rev. Bol. Quim [online]. 2017, vol.34, n.1, pp.01-08. ISSN 0250-5460.

ABSTRACT The use of mutagenic agents both physical and chemical as generators of variability (mutagenesis) are a tool for the genetic improvement of plant species of economic interest, optimizing some characteristics of a Consolidated variety without altering most of the characteristics that are favorable. In the present work, the determination of the average lethal dose and evaluation of the MI and M2 generations of wheat seeds (Triticum aestivum) of the variety "TEPOCA T-89" irradiated with 100, 200 and 300Gy were carried out. In the MI generation, the 145Gy dose was identified as the inducer of the highest number of mutations. Mean valúes of plant height, tenon length, number of grains and grain weight were higher in the plants coming from seeds irradiated with lOOGy, of this same population, possible mutant plants with morphological modifications were selected, the growth valúes reduced to "0", in the highest dose of 300Gy since no plant survived. In the M2 generation the growth valúes were also high for the population of lOOGy, and for plants with morphological modification, which maintained their character of modification. At 200 Gy of irradiation the Na and K content does not present significant changes but the Ca, Mg, Zn, protein, humidity and ash content decreases because at high doses the growth of the plant is inhibited and there is a decrease in the absorption of nutrients and minerals.

Keywords : Irradiación; Mutágeno; Trigo; Generación MI y M2; Micronutrientes; Gray (Gy).

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