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首页> 外文期刊>Cytology and genetics >Cytological Evaluation of Apiaceae Lindl. from Western Himalayas
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Cytological Evaluation of Apiaceae Lindl. from Western Himalayas

机译：pi科的细胞学评价。从西喜马拉雅山

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摘要

The present paper deals with cytological studies on 31 populations covering 17 species belonging to 10 genera of Apiaceae from Western Himalayas. The chromosome numbers in the two species as Chaero-phyllum capnoides (n = 11) and Heracleum brunonis (n = 11), along with additional cytotypes for Pimpinella acuminata (n = 9) and Sium latijugum (n = 12) have been reported for the first time on world-wide basis. The genus Pleurospermum, although cytologically worked out earlier from outside India, its species densiflorum (n = 11) makes first representation of the genus from India. Besides, the chromosome number in Chaerophyl-lum aromaticum (n = 11) have been worked out for the first time from India. The course of meiosis varies from normal to abnormal in different populations of Chaerophyllum villosum, Pimpinella achilleifolia and Sium latijugum while abnormal meiotic course has been observed in all the studied populations of Chaerophyllum acuminatum, C. aromaticum, C. capnoides, Pimpinella acuminata, P. diversifolia, Pleurospermum densiflorum and Vicatia coniifolia. Such taxa are marked with meiotic abnormalities in the form of cytomixis, chromatin stickiness, formation of laggards and bridges resulting into abnormal microsporogenesis. The occurrence of structural heterozygosity has been recorded in the Chaerophyllum acuminatum and C. aromaticum. The effect of these abnormalities is clearly seen on the pollen size and fertility.
机译：本文研究了喜马拉雅西部喜树科10属31种植物的31个种群的细胞学研究。据报导，这两个物种的染色体编号分别为Chaero-phyllum capnoides（n = 11）和Brunnonis（n = 11），以及尖顶平菇（n = 9）和Sium latijugum（n = 12）的其他细胞类型。第一次在全球范围内。侧柏属，尽管从印度以外的地区在细胞学上较早地进行了研究，但其物种densiflorum（n = 11）首次代表了印度的属。此外，印度首次发现了Chaerophyl-lumaromaticum（n = 11）的染色体数。在不同的Chaerophyllum villosum，Pimpinella achilleifolia和Sium latijugum种群中，减数分裂的过程从正常变化到异常，而在所有研究的Chaerophyllum acuminatum，C.aromaticum，C.capnoides，Pimpinella acuminata，P。的种群中都观察到了减数分裂过程的异常。宽叶白千层，紫叶侧柏和Vicatia coniifolia。这样的分类单元以减数分裂异常的形式标记为减数分裂异常，其形式为细胞混合，染色质黏着，形成落后和桥接，从而导致异常的微孢子发生。在Chaerophyllum acuminatum和C.aromaticum中已经记录了结构杂合性的发生。这些异常对花粉大小和繁殖力的影响显而易见。

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