Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India
In the present paper, detailed cytomorphological investigations in Oxyria digyna Hill. from Kashmir Himalaya—India have been reported for the first time. All the 14 investigated populations of O. digyna are diploid based on x = 7. Out of these in two populations 0–2B chromosomes have been recorded f...
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| Дата: | 2014 |
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Інститут клітинної біології та генетичної інженерії НАН України
2014
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| Назва видання: | Цитология и генетика |
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| Цитувати: | Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India / M.I.S. Saggoo // Цитология и генетика. — 2014. — Т. 48, № 1. — С. 52-59. — Бібліогр.: 33 назв. — англ. |
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irk-123456789-1266172017-11-30T03:02:48Z Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India Umer Farooq Saggoo, M.I.S. Оригинальные работы In the present paper, detailed cytomorphological investigations in Oxyria digyna Hill. from Kashmir Himalaya—India have been reported for the first time. All the 14 investigated populations of O. digyna are diploid based on x = 7. Out of these in two populations 0–2B chromosomes have been recorded for the first time while 6 populations differed significantly in their meiotic characteristics. Meiotic abnormalities during male meiosis observed include inter PMC chromatin transfer (cytomixis). Non-synchronous disjunction of some bivalents, laggards and bridges at anaphases and telophases. Consequent to these meiotic anomalies, microsporogenesis in meiocytes is abnormal resulting in to dyads, triads and polyads with or without micronuclei. The overall effect is seen in reduced pollen fertility. Unreduced pollen grains were observed in some populations, which differed significantly in their size compared to the normal (reduced) pollen grains. It is observed that a smaller frequency of pollen grains differed morphologically in Aharbal and Yosmarg populations. The remaining eight populations showed regular meiotic course, normal microsporogenesis and high percentage of pollen fertility (95.09–99.09 %). Приводятся детальные цитоморфологические ис-следования Oxyria digyna Hill из Кашмира (Гималаи, Индия). Все 14 изученных популяций являются диплоидными, где x = 7. Из них в двух популяциях впервые описаны 0–2B хромосомы, тогда как шесть популяций сильно различались по своим мейотическим характеристикам. Аномалии мейоза при микроспорогенезе включали цитомиксис, несинхронное расхождение некоторых бивалентов, задержки и мосты в анафазах и телофазах. Возникающий в связи с этим аномальный микроспорогенез приводит к формированию диад, триад и полиад как с микроядрами, так и без них. Общим эффектом является снижение фертильности пыльцы. В некоторых популяциях наблюдали нередуцированные пыльцевые зерна, которые по величине значительно отличались от нормальных. В популяциях Aharbal и Yosmarg некоторые пыльцевые зерна отличались морфологи-чески. Оставшиеся восемь популяций проявляли нормальный ход мейоза, нормальный микроспорогенез и высокий процент фертильности пыльцы (95,09–99,09 %). The authors are grateful to the University Grants Commission, New Delhi for providing financial assistance under the DRS SAP III and DST programmes. Thanks are also due to the Head, Department of Botany, Punjabi University, Patiala for necessary laboratory facilities. 2014 Article Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India / M.I.S. Saggoo // Цитология и генетика. — 2014. — Т. 48, № 1. — С. 52-59. — Бібліогр.: 33 назв. — англ. 0564-3783 DOI: 10.3103/S0095452714010101 http://dspace.nbuv.gov.ua/handle/123456789/126617 en Цитология и генетика Інститут клітинної біології та генетичної інженерії НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Оригинальные работы Оригинальные работы |
| spellingShingle |
Оригинальные работы Оригинальные работы Umer Farooq Saggoo, M.I.S. Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India Цитология и генетика |
| description |
In the present paper, detailed cytomorphological investigations in Oxyria digyna Hill. from Kashmir Himalaya—India have been reported for the first time. All the 14 investigated populations of O. digyna are diploid based on x = 7. Out of these in two populations 0–2B chromosomes have been recorded for the first time while 6 populations differed significantly in their meiotic characteristics. Meiotic abnormalities during male meiosis observed include inter PMC chromatin transfer (cytomixis). Non-synchronous disjunction of some bivalents, laggards and bridges at anaphases and telophases. Consequent to these meiotic anomalies, microsporogenesis in meiocytes is abnormal resulting in to dyads, triads and polyads with or without micronuclei. The overall effect is seen in reduced pollen fertility. Unreduced pollen grains were observed in some populations, which differed significantly in their size compared to the normal (reduced) pollen grains. It is observed that a smaller frequency of pollen grains differed morphologically in Aharbal and Yosmarg populations. The remaining eight populations showed regular meiotic course, normal microsporogenesis and high percentage of pollen fertility (95.09–99.09 %). |
| format |
Article |
| author |
Umer Farooq Saggoo, M.I.S. |
| author_facet |
Umer Farooq Saggoo, M.I.S. |
| author_sort |
Umer Farooq |
| title |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India |
| title_short |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India |
| title_full |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India |
| title_fullStr |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India |
| title_full_unstemmed |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India |
| title_sort |
cytomorphological investigations in oxyria digyna hill. from the kashmir himalaya, india |
| publisher |
Інститут клітинної біології та генетичної інженерії НАН України |
| publishDate |
2014 |
| topic_facet |
Оригинальные работы |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/126617 |
| citation_txt |
Cytomorphological investigations in Oxyria digyna Hill. from the Kashmir Himalaya, India / M.I.S. Saggoo // Цитология и генетика. — 2014. — Т. 48, № 1. — С. 52-59. — Бібліогр.: 33 назв. — англ. |
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Цитология и генетика |
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AT umerfarooq cytomorphologicalinvestigationsinoxyriadigynahillfromthekashmirhimalayaindia AT saggoomis cytomorphologicalinvestigationsinoxyriadigynahillfromthekashmirhimalayaindia |
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2023-10-18T20:51:13Z |
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2023-10-18T20:51:13Z |
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