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—ytological evaluation of apiaceae Lindl. from Western Himalayas
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 Chaerophyllum 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 Chaerophyllum 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†abnor-mal 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.
Key words: Apiaceae, chromosome numbers, meiotic course, structural heterozygosity, Western Himalayas
Tsitologiya i Genetika 2014, vol. 48, no. 4, pp. 59-66
Department of Botany, Punjabi University, Patiala, India
E-mail: koundelsanjeev gmail.com
|Coded & Designed by Volodymyr Duplij||Modified 10.06.23|