Цитологія і генетика 2022, том 56, № 3, 70-72
Cytology and Genetics 2022, том 56, № 3, 277–284, doi: https://www.doi.org/10.3103/S0095452722030069

Gamma rays induced Cytomictic Variations in Pollen Mother Cells of Cumin (Cuminum cyminum) L.

Kumar G., Bhardwaj M.

  • Plant Genetics Laboratory, Department of Botany, University of Allahabad, India

РЕЗЮМЕ. Цитоміксис – це загадкове цитологічне явище, яке спостерігається між близько розташованими материнськими клітинами пилку (МКП) Cuminum cyminum L. Взаємне переміщення складу хроматину між двома прилеглими мейоцитами спостерігали при різних рівнях гамма­опромінення viz. 100, 125,
150 і 175 Гр у сорту зіри GC­4. Дослідження мікроспорогенезу наборів, опромінених гамма­променями, виявило міжклітинну міграцію різними каналами або безпосереднє злиття. У цій роботі цитоміксис набагато частіше спостерігали як мейоз I порівняно з пізнішим етапом, тобто мейозом II. Рівень повторюваності цитоміксису демонструє поступове зростання з одночасним збільшенням дози гамма­опромінення. Внаслідок цитоміксису було зафіксовано різні аномальні продукти постмейозу на пізнішій стадії клітинного циклу. Більше того, окрім цитоміксису, спостерігалися також інші хромосомні аномалії, які призвели до зниження родючості пилку. Синцитії спостерігали при низькій частоті, однак вони мали високу еволюційну значимість, оскільки вони виробляють гамети з високим рівнем плоїдності. Утворення гамет з незбалансованих хромосом можна використовувати надалі у технологіях селекції, оскільки вони є потужним індуктором змін.

Ключові слова: цитоміксис, поєднання цитоплазми, Cuminum cyminum, гамма­промені, гіперплоїдний, гіпоплоїдний, синцитій

Цитологія і генетика
2022, том 56, № 3, 70-72

Current Issue
Cytology and Genetics
2022, том 56, № 3, 277–284,
doi: 10.3103/S0095452722030069

Повний текст та додаткові матеріали

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