Radiation induced sterility in a diploid and a tetraploid species of Physalis.
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Biological damage sensu cytogenetical alterations was systematically scored in a diploid (P. ixocarpa), and a tetraploid (P. peruviana) species of Physalis after different doses of gamma-irradiation and evaluated on the parameters of pollen and plant sterility.There was a gradual reduction in the survival of seedlings which was realized more in P. ixocarpa than in P. peruviana. The meiotic abnormalities affected normal pollen formation, thereby contributing to pollen sterility and concomitantly to plant sterility. The sterility of pollen and plant were interconnected and related with the employed radiation doses in M1 and M2 generation. But their frequencies were fewer in M2 than M1. The overall response of the two species to any partic-ular dose of radiation was different, but the interesting point that emerged is that the meiotic abnormalities and pollen sterility were greater in tetraploid species, whereas plant sterility was more in the diploid. Significance of these observations have been discussed. An overall assessment was that the diploid species is more radiosensitive than the tetraploid one.
- 財団法人 日本メンデル協会の論文
財団法人 日本メンデル協会 | 論文
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