干旱区生态环境知识资源中心(Arid): Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu & Kashmir)

Arid

DOI	10.1016/j.flora.2019.151520
	Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu & Kashmir)
	Tantray, Younas Rasheed; Singhal, Vijay Kumar; Gupta, Raghbir Chand
通讯作者	Tantray, Younas Rasheed
来源期刊	FLORA
ISSN	0367-2530
EISSN	1618-0585
出版年	2020
卷号	262
英文摘要	Present study reports the chromosome counts and meiotic analysis including microsporogenesis and pollen fertility in 10 species of the genus Artemisia from the cold deserts of Ladakh in the state of Jammu and Kashmir for the first time. We here add the chromosome record for species, A. desertorum for the first time from India which also includes the new intraspecific hexaploid cytotype (2n = 54) for A. desertorum. The study also reports the presence of B-chromosomes for A. gmelinii. The course of meiosis in most of the accessions was observed to be regular except for some individuals of A. absinthium, A. desertorum, A. gmelinii, and A. sieversiana which showed certain meiotic abnormalities in meiocytes involving cytomixis, chromatin stickiness, chromatin bridges, lagging chromosomes and late segregation of bivalents and consequently irregular sporads and sterile pollen grains. The genus Artemisia shows a considerable heterogeneity in chromosome numbers varying from 2n = 14 to 2n = 144. The genus exhibits several base numbers (x = 7, 8, 9, 11, 17) but x = 9 is regarded as the most common and favoured basic number. The next favoured base number is x = 8. On the otherhand, other basic numbers, x = 7, 11 and 17 are rather less common. The affect of polyploidy in genus evolution seems to be quite significant as 52.12 % of the species exists at various ploidy levels (3x, 4x, 5x, 6x, 8x, 10x, 12x, 14x). Aneuploidy causing chromosome variation in the genus is equally important from the existence of intraspecific aneuploid/ dysploid cytotypes.
英文关键词	Artemisia Basic number Chromosome counts Cold deserts Polyploidy
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000514173000010
WOS关键词	RARE CHROMOSOME COUNTS ; NUCLEAR RIBOSOMAL DNA ; POLLEN MOTHER-CELLS ; L. ASTERACEAE ; MALE MEIOSIS ; GENOME SIZE ; ANTHEMIDEAE ASTERACEAE ; NORTHWEST HIMALAYA ; SYNCYTE FORMATION ; PARVATI VALLEY
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314510
作者单位	Punjabi Univ, Dept Bot, Patiala 147002, Punjab, India
推荐引用方式 GB/T 7714	Tantray, Younas Rasheed,Singhal, Vijay Kumar,Gupta, Raghbir Chand. Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu & Kashmir)[J],2020,262.
APA	Tantray, Younas Rasheed,Singhal, Vijay Kumar,&Gupta, Raghbir Chand.(2020).Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu & Kashmir).FLORA,262.
MLA	Tantray, Younas Rasheed,et al."Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu & Kashmir)".FLORA 262(2020).