Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas
The present paper deals with meiotic studies in 15 species belonging to 6 genera of the tribe Cichorieae from various localities of Western Himalayas. The chromosome number has been reported for the first time in Hieracium crocatum (2n=10) and Lactuca lessertiana (2n=2x=16). Further, intraspecific v...
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doaj-a4ec4c26bc9e4c2789684f17ac3e85cf2020-11-25T02:15:34ZengHindawi LimitedThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/673456673456Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western HimalayasRaghbir Chand Gupta0Henna Goyal1Vijay Singh2Rajesh Kumar Goel3Department of Botany, Punjabi University, Patiala 147002, IndiaDepartment of Botany, Punjabi University, Patiala 147002, IndiaDepartment of Botany, Punjabi University, Patiala 147002, IndiaDepartment of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, IndiaThe present paper deals with meiotic studies in 15 species belonging to 6 genera of the tribe Cichorieae from various localities of Western Himalayas. The chromosome number has been reported for the first time in Hieracium crocatum (2n=10) and Lactuca lessertiana (2n=2x=16). Further, intraspecific variability has been reported for the first time in H. umbellatum (2n=2x=10 and 2n=6x=54), Tragopogon dubius (2n=2x=14 and 2n=4x=28), and T. gracilis (2n=2x=14). The chromosome report of 2n=2x=10 in Youngia tenuifolia is made for the first time in India. Maximum numbers of the populations show laggards, chromosome stickiness, and cytomixis from early prophase to telophase-II, leading to the formation of aneuploid cells or meiocytes with double chromosome number. Such meiotic abnormalities produce unreduced pollen grains and the reduced pollen viability.http://dx.doi.org/10.1155/2014/673456 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Raghbir Chand Gupta Henna Goyal Vijay Singh Rajesh Kumar Goel |
spellingShingle |
Raghbir Chand Gupta Henna Goyal Vijay Singh Rajesh Kumar Goel Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas The Scientific World Journal |
author_facet |
Raghbir Chand Gupta Henna Goyal Vijay Singh Rajesh Kumar Goel |
author_sort |
Raghbir Chand Gupta |
title |
Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas |
title_short |
Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas |
title_full |
Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas |
title_fullStr |
Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas |
title_full_unstemmed |
Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas |
title_sort |
meiotic studies in some species of tribe cichorieae (asteraceae) from western himalayas |
publisher |
Hindawi Limited |
series |
The Scientific World Journal |
issn |
2356-6140 1537-744X |
publishDate |
2014-01-01 |
description |
The present paper deals with meiotic studies in 15 species belonging to 6 genera of the tribe Cichorieae from various localities of Western Himalayas. The chromosome number has been reported for the first time in Hieracium crocatum (2n=10) and Lactuca lessertiana (2n=2x=16). Further, intraspecific variability has been reported for the first time in H. umbellatum (2n=2x=10 and 2n=6x=54), Tragopogon dubius (2n=2x=14 and 2n=4x=28), and T. gracilis (2n=2x=14). The chromosome report of 2n=2x=10 in Youngia tenuifolia is made for the first time in India. Maximum numbers of the populations show laggards, chromosome stickiness, and cytomixis from early prophase to telophase-II, leading to the formation of aneuploid cells or meiocytes with double chromosome number. Such meiotic abnormalities produce unreduced pollen grains and the reduced pollen viability. |
url |
http://dx.doi.org/10.1155/2014/673456 |
work_keys_str_mv |
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