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<p>Putative mutants of mango genotype Bappakkai derived through gamma irradiation were evaluated for changes in morphological and stomatal traits along with concentration of phyto-hormones and the induced genetic variability was estimated using microsatellite markers. Higher dosage of gamma rays resulted in reduced plant height and the lowest mean plant height (18.71&#xa0;cm) was recorded at 35&#xa0;Gy irradiation treatment. Stimulatory effect of lower doses of gamma irradiation on stomatal density (SD) was evident in our study and maximum SD was observed at 15&#xa0;Gy (14.82 number/20000 µm<sup>2</sup>) while higher doses of gamma irradiation reduced stomatal density being 11.49 number/20,000 µm<sup>2</sup>at 35&#xa0;Gy. Higher mean number of alleles was recorded for the treated population indicating the effect of mutation on increasing variability. Further, the mean Shannon’s Information index (I) was found to be more in the treated population (1.26) than control (0.97) and average value of Ho was found to be less than He. The present study indicates that gamma irradiation brought about changes in morphological, stomatal parameters (width, length and density) and resulted in generation of certain genetically diverged mutants. In order to further improve and stabilize rootstock features in mango genotype Bappakkai, the genetically divergent mutant lines obtained in the current study might be exploited either in mango improvement programmes or as mutant varieties.</p>

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Radiation induced mutations alter morpho-biochemical, anatomical and molecular responses in polyembryonic mango genotype Bappakkai

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • Nusrat Perveen,
  • M. R. Dinesh,
  • M. Sankaran,
  • K. Hima Bindu,
  • K. S. Shivashankara,
  • K. V. Ravishankar,
  • Nandkishor M. Kanade,
  • Prashant Kalal,
  • Hidayatullah Mir

摘要

Putative mutants of mango genotype Bappakkai derived through gamma irradiation were evaluated for changes in morphological and stomatal traits along with concentration of phyto-hormones and the induced genetic variability was estimated using microsatellite markers. Higher dosage of gamma rays resulted in reduced plant height and the lowest mean plant height (18.71 cm) was recorded at 35 Gy irradiation treatment. Stimulatory effect of lower doses of gamma irradiation on stomatal density (SD) was evident in our study and maximum SD was observed at 15 Gy (14.82 number/20000 µm2) while higher doses of gamma irradiation reduced stomatal density being 11.49 number/20,000 µm2at 35 Gy. Higher mean number of alleles was recorded for the treated population indicating the effect of mutation on increasing variability. Further, the mean Shannon’s Information index (I) was found to be more in the treated population (1.26) than control (0.97) and average value of Ho was found to be less than He. The present study indicates that gamma irradiation brought about changes in morphological, stomatal parameters (width, length and density) and resulted in generation of certain genetically diverged mutants. In order to further improve and stabilize rootstock features in mango genotype Bappakkai, the genetically divergent mutant lines obtained in the current study might be exploited either in mango improvement programmes or as mutant varieties.