Effect of B-chromosomes on meiotic behaviour and genetic recombination in Artemisia nilagirica (C. B. Clarke) Pamp.

Bala, Santosh; Kaushal, Beena; Gupta, Raghbir Chand

doi:10.3199/iscb.7.9

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Besides, hexaploid cytotype with 2n = 54 is also reported by Mathew & Mathew (1988) in South Indian populations. The presence of 0-4 B chromosomes confirms the earlier reported by one of the authors (Bala et al 2012) from Sirmaur district (H.P.). A. parviflora Roxb.…”

Section: Resultssupporting

confidence: 81%

Cytology of the genus Artemisia (Anthemidae, Asteraceae) in the Western Himalayas

Gupta¹,

Goyal²,

Singh³

2014

Biologia

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The present study revealed the varied frequency of natural chromosomal abnormalities in 13 populations pertaining to 9 species of the genus Artemisia L. from different localities of Himachal Pradesh (Western Himalaya). Intraspecific chromosome variability has been reported for the first time on worldwide basis in Artemisia vestita (2n = 2x = 36) and from India in A. macrocephala (2n = 2x = 18) and A. scoparia (2n = 2x = 36). Besides, B-chromosomes have been reported here for the first time in A. nilagirica and A. roxburghiana. Most of the populations show anomalous meiotic behaviour resulting in cytomixis, chromosomal stickiness, unoriented bivalents, formation of laggards and bridges which leads to abnormal microsporogenesis, and production of heterogeneous-sized fertile pollen grains along with reduced pollen fertility.

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Section: Resultssupporting

confidence: 81%

Cytology of the genus Artemisia (Anthemidae, Asteraceae) in the Western Himalayas

Gupta¹,

Goyal²,

Singh³

2014

Biologia

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“…These reveal chromosome numbers of 2n = 34 and 54; seemingly belonging to different base numbers. Previous work on this species from the country has reported it to be diploid with 2n = 18, based on n = 9 (Bala et al 2012;Mehra and Remanandan 1974). B chromosomes are also reported in this species (Bala et al 2012).…”

Section: Discussionsupporting

confidence: 48%

“…Previous work on this species from the country has reported it to be diploid with 2n = 18, based on n = 9 (Bala et al 2012;Mehra and Remanandan 1974). B chromosomes are also reported in this species (Bala et al 2012). No data on chromosome number of this species are available from other parts of the world.…”

Section: Discussionmentioning

confidence: 81%

Resource allocation in relation to meiotic system in two species ofArtemisiafrom North-West Himalayas

Sharma

2015

Caryologia

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Artemisia scoparia Waldst & Kit and Artemisia nilagirica (C. B. Clarke) Pamp. are two economically important species of Artemisia L. (F: Asteraceae) forming distinct populations in subtropical to subtemperate regions of Jammu division in Jammu and Kashmir state, India. Both these species have perennial root stocks through which they produce aerial offshoots each year and spread vegetatively. Species differ in their sex expression as well as in reproductive output through sexual reproduction. A probe into their genetic system revealed them to be matching in breeding system as both were predominantly outcrossed. However they differ markedly in their meiotic system and reproductive effort (both sexual and vegetative). The differences were both inter as well as intraspecific. Fruit set in plants of Artemisia scoparia is high and plants are perfect diploids with 2n = 16 (n = 8). Fruit set in A. nilagirica is comparatively low. It also exhibits interpopulation chromosomal variability in the form of polyploid and aneuploid races. In A. nilagirica, two different chromosome numbers which were predominant are 2n = 34 and 2n = 54. Species are also variable in their reproductive effort. The population with lower reproductive output through sexual reproduction has a higher investment in rootstock and vice versa. This paper tries to elaborate the variability in chromosome complement, reproductive output and reproductive effort of these species.

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Cytomorphological diversity in some selected members of Poaceae from Parvati Valley in Kullu district of Himachal Pradesh, India

2014

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The Indian Himalayan Region (IHR) is known as the repository of biodiversity. It supports 8,000 species of angiosperms. The orchidaceae is among the dominant family of angiospecies and highly evolved family among the monocotyledon. The species of this family are facing tremendous pressure due to habitat degradation, overexploitation and changing environmental conditions. Therefore, while exploring the floristic diversity of Parvati Valley, attempts have also been made to explore the orchid diversity and analyze for diversity, distribution patterns, nativity, endemism, threat categories and indigenous uses. Total 19 species of the orchids representing 13 genera were recorded between 1100-3600 m amsl. Of these, 13 species were natives, 6 species near endemic and 5 species non-natives. These species represented in grassland, shady moist, forests, alpine meadows, moist rocks and bouldary habitats. These species were used for curing various diseases/ailments by the inhabitants of the valley. Due to habitat degradation the populations of these species are decreasing fast. The over exploitation, habitat degradation and changing environmental conditions of these species has led rapid population depletion. Therefore, appropriate strategy has been suggested for the conservation and management of these orchids.

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Effect of B-chromosomes on meiotic behaviour and genetic recombination in Artemisia nilagirica (C. B. Clarke) Pamp.

Cited by 7 publications

References 21 publications

Cytology of the genus Artemisia (Anthemidae, Asteraceae) in the Western Himalayas

Cytology of the genus Artemisia (Anthemidae, Asteraceae) in the Western Himalayas

Resource allocation in relation to meiotic system in two species ofArtemisiafrom North-West Himalayas

Cytomorphological diversity in some selected members of Poaceae from Parvati Valley in Kullu district of Himachal Pradesh, India

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