Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas

Disparity or continuity in the chromosome count within taxa of various categories has been verified to be an imperative character for taxonomic classification. Male meiotic studies in 64 species (161 accessions) of composits from geographically isolated regions were examined in detail in order to up...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Younas Rasheed Tantray, Ishrat Jan, Mohammad Saleem Wani, Vijay Kumar Singhal, Raghbir Chand Gupta
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Chromosome counts Cytomixis Himalayas Male meiosis Polyploidy Reciprocal translocation Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/76583bd057314689803de468e4717c3f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:76583bd057314689803de468e4717c3f
record_format	dspace
spelling	oai:doaj.org-article:76583bd057314689803de468e4717c3f2021-11-28T04:32:52ZChromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas2287-884X10.1016/j.japb.2021.07.002https://doaj.org/article/76583bd057314689803de468e4717c3f2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2287884X21000704https://doaj.org/toc/2287-884XDisparity or continuity in the chromosome count within taxa of various categories has been verified to be an imperative character for taxonomic classification. Male meiotic studies in 64 species (161 accessions) of composits from geographically isolated regions were examined in detail in order to update the existing knowledge of meiotic chromosome numbers of composits from the outer part of the Himalayas. Myriactis javanica (2n = 36) and Tanacetum nubigenum (2n = 36) have been counted chromosomally for the first time at the world level. Besides, Koelpinia linearis (2n = 36), Ajania fruticulosa (2n = 18), Crepis flexuosa (2n = 14), and Tanacetum gracile (2n = 18) have been analyzed chromosomally for the first time from India. New intraspecific diploid/polyploid cytotypes are added for Artemisia desertorum (2n = 6x = 54), Carduus nutans (2n = 4x = 16), Erigeron annuus (2n = 2x = 18), Leontopodium jacotianum (2n = 4x = 48), Pentanema indicum (2n = 6x = 54), Scorzonera virgata (2n = 2x = 16), and Tragopogon pratensis (2n = 2x = 12). Besides, eight species have been evaluated cytologically for the first time from Kashmir Himalayas. Various meiotic abnormalities like cytomixis, structural heterozygosity, chromatin stickiness, nonsynchronous disjunction, laggards, bridges, unoriented chromosomes leading to pollen sterility have been observed for the first time in some species. The presence of B-chromosomes has been detected in Achillea millefolium (2n = 18+0-1B) and Saussurea candolleana (2n = 26+0-1B). Among meiotically analyzed species, diploids (76.5%) and polyploids (23.5%) prevail.Younas Rasheed TantrayIshrat JanMohammad Saleem WaniVijay Kumar SinghalRaghbir Chand GuptaElsevierarticleChromosome countsCytomixisHimalayasMale meiosisPolyploidyReciprocal translocationEcologyQH540-549.5ENJournal of Asia-Pacific Biodiversity, Vol 14, Iss 4, Pp 590-606 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chromosome counts Cytomixis Himalayas Male meiosis Polyploidy Reciprocal translocation Ecology QH540-549.5
spellingShingle	Chromosome counts Cytomixis Himalayas Male meiosis Polyploidy Reciprocal translocation Ecology QH540-549.5 Younas Rasheed Tantray Ishrat Jan Mohammad Saleem Wani Vijay Kumar Singhal Raghbir Chand Gupta Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
description	Disparity or continuity in the chromosome count within taxa of various categories has been verified to be an imperative character for taxonomic classification. Male meiotic studies in 64 species (161 accessions) of composits from geographically isolated regions were examined in detail in order to update the existing knowledge of meiotic chromosome numbers of composits from the outer part of the Himalayas. Myriactis javanica (2n = 36) and Tanacetum nubigenum (2n = 36) have been counted chromosomally for the first time at the world level. Besides, Koelpinia linearis (2n = 36), Ajania fruticulosa (2n = 18), Crepis flexuosa (2n = 14), and Tanacetum gracile (2n = 18) have been analyzed chromosomally for the first time from India. New intraspecific diploid/polyploid cytotypes are added for Artemisia desertorum (2n = 6x = 54), Carduus nutans (2n = 4x = 16), Erigeron annuus (2n = 2x = 18), Leontopodium jacotianum (2n = 4x = 48), Pentanema indicum (2n = 6x = 54), Scorzonera virgata (2n = 2x = 16), and Tragopogon pratensis (2n = 2x = 12). Besides, eight species have been evaluated cytologically for the first time from Kashmir Himalayas. Various meiotic abnormalities like cytomixis, structural heterozygosity, chromatin stickiness, nonsynchronous disjunction, laggards, bridges, unoriented chromosomes leading to pollen sterility have been observed for the first time in some species. The presence of B-chromosomes has been detected in Achillea millefolium (2n = 18+0-1B) and Saussurea candolleana (2n = 26+0-1B). Among meiotically analyzed species, diploids (76.5%) and polyploids (23.5%) prevail.
format	article
author	Younas Rasheed Tantray Ishrat Jan Mohammad Saleem Wani Vijay Kumar Singhal Raghbir Chand Gupta
author_facet	Younas Rasheed Tantray Ishrat Jan Mohammad Saleem Wani Vijay Kumar Singhal Raghbir Chand Gupta
author_sort	Younas Rasheed Tantray
title	Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
title_short	Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
title_full	Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
title_fullStr	Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
title_full_unstemmed	Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas
title_sort	chromosome numbers and meiotic behavior in some species of asteraceae from high altitudinal regions of kashmir himalayas
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/76583bd057314689803de468e4717c3f
work_keys_str_mv	AT younasrasheedtantray chromosomenumbersandmeioticbehaviorinsomespeciesofasteraceaefromhighaltitudinalregionsofkashmirhimalayas AT ishratjan chromosomenumbersandmeioticbehaviorinsomespeciesofasteraceaefromhighaltitudinalregionsofkashmirhimalayas AT mohammadsaleemwani chromosomenumbersandmeioticbehaviorinsomespeciesofasteraceaefromhighaltitudinalregionsofkashmirhimalayas AT vijaykumarsinghal chromosomenumbersandmeioticbehaviorinsomespeciesofasteraceaefromhighaltitudinalregionsofkashmirhimalayas AT raghbirchandgupta chromosomenumbersandmeioticbehaviorinsomespeciesofasteraceaefromhighaltitudinalregionsofkashmirhimalayas
_version_	1718408325160239104

Chromosome numbers and meiotic behavior in some species of Asteraceae from high altitudinal regions of Kashmir Himalayas

Ejemplares similares