scholarly journals Karyotype in Paeonia intermedia C.A. Mey

2014 ◽  
Vol 43 (1) ◽  
pp. 101-105
Author(s):  
Shi-Quan Wang
Keyword(s):  
Chromosome Number ◽  
Karyotypic Formula

The chromosome number and karyotype of three populations in Paeonia intermedia C.A. Mey are presented in this paper. The populations, sampled from Altai Prefecture in Xinjiang, China, are diploids (2n = 10), with 2A type karyotype and the karyotypic formula of 2n = 2x = 10 = 6m + 2sm + 2st. There was no obvious differentiation among all the three sections of the genus Paeonia based on parameters of arm ratio and ratio of the longest/shortest chromosome (L1/Ln). There is merely slight difference between the woody section (Sect. Moutan) and the herbaceous sections (Sects. Onaepia and Paeonia). DOI: http://dx.doi.org/10.3329/bjb.v43i1.19758 Bangladesh J. Bot. 43(1): 101-105, 2014 (June

scholarly journals Extensive karyotype variability of African fish genus Nothobranchius (Cyprinodontiformes)

2018 ◽  
Vol 12 (3) ◽  
pp. 387-402 ◽  
Author(s):  
Eugene Krysanov ◽  
Tatiana Demidova
Keyword(s):  
Life Cycle ◽  
Chromosome Number ◽  
Diploid Chromosome Number ◽  
East African ◽  
Multiple Sex Chromosomes ◽  
Karyotype Variability ◽  
Karyotypic Formula ◽  
Unstable Environment ◽  
First Time ◽  
Species Proportion

Karyotypes of 65 species of the genus Nothobranchius Peters, 1868 were reviewed and of those 35 examined first time. The results of present study have shown that fishes of the genus Nothobranchius possessed highly diverse karyotypes. The diploid chromosome number (2n) ranged from 16 to 50. The most frequent 2n was 2n = 36 (in 35 species) while the second one 2n = 38 (in 13 species). Proportion of biarmed chromosomes varied from 0 to 95% between species. Diploid chromosome number variability apparently exists as a result of chromosomal fusions or fissions and extensive karyotypic formula alterations promoting by inversions. Multiple sex chromosomes of system X1X1X2X2/X1X2Y type were found only in karyotypes of 5 species. The extensive karyotype variability, unusual for teleosts, of genus Nothobranchius can be likely associated with the characteristics of its life cycle and inhabiting under unstable environment of East African savannah temporal pools.

scholarly journals A karyotype study in two fish species belonging to Genus Neolissochilus found in Meghalaya, India

2021 ◽  
Vol 13 (3) ◽  
pp. 1127-1134
Author(s):  
Raffealla Nongrum ◽  
Rabindra Nath Bhuyan
Keyword(s):  
Chromosome Number ◽  
Fish Species ◽  
Basic Chromosome Number ◽  
Diploid Chromosome Number ◽  
Morphological Similarity ◽  
Basic Chromosome ◽  
Karyotypic Formula ◽  
Karyotype Formula ◽  
Taxonomic Confusion

The karyomorphological study of two species of Mahseer belonging to the genus Neolissochilus, namely Neolissochilus hexagonolepis and N. hexastichus were carried out. The study revealed the basic chromosome number in both the Masheer species was observed to be 100. However, the karyotype formula number varied among the species. N. hexagonolepis had a diploid chromosome number of 42 metacentric (m), 20 submetacentric (sm), 8 subtelocentric (st) and 30 telocentric (t) and N. hexastichus had a karyotypic formula of 32 metacentric (m), 22 submetacentric (sm), 4 subtelocentric (st) and 42 telocentric (t). This finding removed taxonomic confusion due to the differences in the chromosome number, the morphology of the chromosomes and chromosome formula between the two fish species of the genus and helped in distinctive and unblemished identification of the two species belonging to the genus Neolissochilus from Meghalaya, though they have a morphological similarity.

IOPB CHROMOSOME NUMBER REPORTS LVIII

Taxon ◽  
1977 ◽  
Vol 26 (5-6) ◽  
pp. 557-565 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

IOPB CHROMOSOME NUMBER REPORTS XXV

Taxon ◽  
1970 ◽  
Vol 19 (1) ◽  
pp. 102-113 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

IOPB CHROMOSOME NUMBER REPORTS LVI

Taxon ◽  
1977 ◽  
Vol 26 (2-3) ◽  
pp. 257-274 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

Distribution and chromosome number of Sonchus palustris in Slovakia

2020 ◽  
Vol 62 (1-2) ◽  
pp. 7-21
Author(s):  
M. Dudáš ◽  
P. Eliáš jun. ◽  
D. R. Letz ◽  
Z. Bártová ◽  
V. Kolarčik
Keyword(s):  
Chromosome Number ◽  
Red List ◽  
Herbarium Specimens ◽  
Distribution Map ◽  
Literary Sources ◽  
Different Types ◽  
New Localities ◽  
Recent Version

The distribution of Sonchus palustris in Slovakia was studied using herbarium specimens and literary sources. The herbarium studies, supplemented with targeted field search in the years 2015–2018, revealed 61 new localities and confirmed many other older locations. The species has been recorded in 19 phytogeographical districts and sub-districts of Slovakia. Most of the records are concentrated in the Podunajská nížina lowland in SW Slovakia and in the Ipel'sko-rimavská brázda region in southern Slovakia. Our results showed that the species is relatively common in different types of wetlands and its re-evaluation in the recent version of the Slovak red list is not needed. Chromosome number data for two new populations in eastern Slovakia (both 2n = 18) were counted. The distribution map is given.

CHROMOSOME NUMBER DETERMINATIONS IN FAMILY COMPOSITAE, TRIBE ASTEREAE. IX. NORTH AMERICAN TAXA. II

Rhodora ◽  
10.3119/18-07 ◽  
2019 ◽  
Vol 121 (985) ◽  
pp. 37 ◽  
Author(s):  
John C. Semple ◽  
Rachel E. Cook ◽  
Gary H. Morton ◽  
James B. Beck ◽  
Rita Lopez Laphitz
Keyword(s):  
Chromosome Number ◽  
North American

Cytology and Breeding of Hexaploid Alfalfa. I. Stability of Chromosome Number 1

Crop Science ◽  
1979 ◽  
Vol 19 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Sheng‐Tian Yen ◽  
R. P. Murphy
Keyword(s):  
Chromosome Number
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