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>The Dynamics of Chromosomal Instability of Welsh Onion (Allium fistulosum L.): Gamma-Irradiation of Seeds of Different Age
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The Dynamics of Chromosomal Instability of Welsh Onion (Allium fistulosum L.): Gamma-Irradiation of Seeds of Different Age
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机译：The Dynamics of Chromosomal Instability of Welsh Onion (Allium fistulosum L.): Gamma-Irradiation of Seeds of Different Age
The chromosomal aberrations in root meristem cells of welsh onion (Allium fistulosum L.) seeds after gamma irradiation (5 and 10 Gy) of seeds of different age (7, 19, 31, 43, and 55 months of storage) were studied. The irradiation dose of 5 Gy significantly increased the frequency of aberrant anaphases (FAA) for 31- and 43-month-old seeds; the dose of 10 Gy significantly increased the FAA in seeds of all age groups. The irradiation (10 Gy) of young (7 month-old) seeds resulted in decreasing the fraction of bridges to the control level of the old (55-month-old) seeds for the dose of 5 Gy and below the control level of the old seeds-for the dose of 10 Gy. Some peculiarities of the cytogenetic parameter of genome instability and the germinating capacity of 31-month-old seeds made it possible to assume that the third year of storage is the critical period for the welsh onion seeds.
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