Detailed cytomorphological investigations through male meiosis of polypetalous plants from the Kashmir Himalaya

Jeelani, Syed Mudassir; Kumari, Santosh; Gupta, Raghbir Chand; Siddique, M. A. A.

doi:10.1007/s00606-013-0954-z

Cited by 9 publications

(7 citation statements)

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“…As a result of these meiotic abnormalities, as motioned earlier, there is formation of large-and small-sized pollen grains along with reduced pollen fertility. These results are in compliance with previous such studies (Rani et al 2010, Jeelani et al 2012, Jeelani et al 2014.…”

Section: Meiotic Abnormalitiessupporting

confidence: 94%

Cytomorphology, Geographical Distribution and Ethnobotany of Genus <i>Oxalis</i> Linn. from Western Himalaya (India)

et al. 2015

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SummaryThe genus Oxalis belongs to the family Oxalidaceae and includes mostly wild as well as commonly cultivated ornamental plants. To generate basic information on genetic diversity required for the improvement of germplasm, the present study was carried out from the different areas of the Western Himalayas. During the study, eight accessions belonging to two species of the genus Oxalis were cytomorphologically observed. New intraspecific cytotypes in O. corniculata (2n=14) at world level and O. corymbosa (2n=14) at India level were reported. In comparison, these diploid and tetraploid cytotypes for O. corymbosa show significant variations in relation to morphology as well as geographical distribution on the world map. Further, the meiotic course in most of these accessions was observed to be normal except for one accession of O. corniculata marked with meiotic anomalies, directly influencing the pollen fertility.

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Section: Meiotic Abnormalitiessupporting

confidence: 94%

Cytomorphology, Geographical Distribution and Ethnobotany of Genus <i>Oxalis</i> Linn. from Western Himalaya (India)

et al. 2015

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“…Thus in the presently studied populations indicate the existence of intraspecific genetic diversities in the species. Such genetic differences have earlier been reported in different plant species (Sheidai et al 2003, Rani et al 2013, Jeelani et al 2013). The phenomenon of chromatin transfer from early prophase to the pollen formation stage (Fig.…”

Section: Resultssupporting

confidence: 72%

Identification of new cytotypes of Valeriana jatamansi Jones, 1970 (Valerianaceae) from North-Western Himalayan region of India

Rani¹,

Sharma²,

Kapila³

et al. 2015

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Valeriana jatamansi, a medicinally important species of the family Valerianaceae, has been cytologically studied in different geographical areas of North-Western Himalayan region of India. The tetraploid cytotype with chromosome numbers 2n=32 is in conformity with the earlier reports of the species from different parts of the world. An octoploid cytotype (2n=64) makes a new addition for the species on a worldwide basis, whereas the diploid cytotype (2n=16) is new to India have been reported for the first time in India. These cytotypes (2n=16, 32, 64) show significant variations with respect to morphology as well as geographical distribution in the Western Indian Himalayas. Further, anomalous populations have been marked with meiotic abnormalities in the form of cytomixis, chromosomal stickiness, unoriented bivalents, formation of laggards and bridges resulting in abnormal microsporogenesis, and production of heterogeneous-sized fertile pollen grains along with reduced pollen fertility.

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“…Besides, Jeelani et al (2014) have also reported the existence of plants with a chromosome count of 2n=16 from Kangra district, Himachal Pradesh. It thus indicates that the species, which is quite widespread in the Himalayas, exhibits the presences of three different cytotypes at diploid level (2n=14, 16, 18).…”

Section: Impatiens Brachycentra Kar and Kirmentioning

confidence: 98%

Chromosome Counts through Male Meiosis in Some Dicots from the Hills around Shimla, Himachal Pradesh

et al. 2016

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SummaryIn the present work, detailed male meiotic studies were performed on 24 dicot species from the hills around Shimla within the altitudinal range of 1880-3140 m and which include the first ever chromosome count for Polygonum polystachyum (n= 11) from India. Further, a new intraspecific aneuploid cytotype of 2n=18 for Impatiens brachycentra and B-chromosomes have been reported in Pimpinella acuminata. The phenomenon of cytomixis involving chromatin transfer among neighbouring PMCs along with associated meiotic irregularities and pollen malformation has been detected in some individuals of Clematis grata (n=8) and Ranunculus laetus (n= 14). For the rest of the species, the study confirms the earlier chromosome counts by other workers. Analysis of chromosomal data on the worked out species reveals that aneuploidy and polyploidy has a role to play in evolution.

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Detailed cytomorphological investigations through male meiosis of polypetalous plants from the Kashmir Himalaya

Cited by 9 publications

References 50 publications

Cytomorphology, Geographical Distribution and Ethnobotany of Genus <i>Oxalis</i> Linn. from Western Himalaya (India)

Cytomorphology, Geographical Distribution and Ethnobotany of Genus <i>Oxalis</i> Linn. from Western Himalaya (India)

Identification of new cytotypes of Valeriana jatamansi Jones, 1970 (Valerianaceae) from North-Western Himalayan region of India

Chromosome Counts through Male Meiosis in Some Dicots from the Hills around Shimla, Himachal Pradesh

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