scholarly journals Karyological study of some plant taxa from Greece

2021 ◽  
Vol 31 ◽  
Keyword(s):  
Karyological Study

A Karyological Study of Fourteen Species in Eleven Genera of the Orchidaceae

2010 ◽  
Vol 31 (6) ◽  
pp. 504-508
Author(s):  
Rao MO ◽  
Qing-Yun LENG ◽  
Ming-Zhong HUANG ◽  
Bin PEN ◽  
Yan-Qiong TANG ◽  
...  
Keyword(s):  
Karyological Study

scholarly journals Karyological study of Amphisbaena ridleyi (Squamata, Amphisbaenidae), an endemic species of the Archipelago of Fernando de Noronha, Pernambuco, Brazil

2010 ◽  
Vol 33 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Marcia Maria Laguna ◽  
Renata Cecília Amaro ◽  
Tamí Mott ◽  
Yatiyo Yonenaga-Yassuda ◽  
Miguel Trefaut Rodrigues
Keyword(s):  
Endemic Species ◽  
Karyological Study ◽  
Fernando De Noronha

scholarly journals A Karyological Study in Some Species of Coffea L. and in the Closest Relative Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy

2012 ◽  
Vol 40 (2) ◽  
pp. 39 ◽  
Author(s):  
Neiva Izabel PIEROZZI ◽  
Thalita C. BORGHI ◽  
Maria Bernadete SILVAROLLA
Keyword(s):  
Chromosome Pair ◽  
Secondary Constriction ◽  
Karyological Study ◽  
Karyotype Asymmetry ◽  
Centromeric Position ◽  
Karyotype Formula ◽  
Orcein Staining ◽  
Nor Band ◽  
Chromosome Characterization

Chromosome characterization were carried out in Coffea kapakata A. Chev (Bridson), C. racemosa Lour., C. salvatrix Swynn. & Philipson and in Psilanthus travancorensis (Wight & Arn.) J.-F. Leroy (2n=22) by employing the conventional acetic orcein technique as well as by C- and NOR-banding aiming further comparative studies. Although C. canephora and C. dewevrei have already been studied and depict a C-band karyotype, they have also been included for further comparisons, since NOR-banding and some other morphometric data have not been obtained yet. However, there were observed some differences among the species regarding chromosomal morphometry. The karyotype formula obtained was 3m+6sm+2sms for C. salvatrix and P. travancorensis, 1M +2m + 6sm + 2sms for C. kapakata and 2M +1m + 6sm + 2sms for C. racemosa. All species displayed a moderate karyotype asymmetry and according to Stebbins system, C. canephora, C. dewevrei, C. kapakata and C. racemosa were classified as 3B while C. salvatrix and P. travancorensis were classified as 2A. Among the four indices used to assess karyotype asymmetry, Paszko AI index along with Stebbins were best suited to individualize the species. C-bands were preferentially situated at a pericentromeric/centromeric position. Two pairs of chromosomes, with secondary constriction and satellite segments, were observed in all the species following acetic orcein staining. C. racemosa and C. salvatrix showed NOR-band in both pairs, while only one chromosome pair carrying NOR-band was seen in C. canephora, C. dewevrei, C. kapakata and P. travancorensis. Data on chromosome morphometry, asymmetry indices and NOR-banding were suitable for the characterization of the species.

scholarly journals Karyological Study of Two Populations of Capoeta capoeta from North Iran.

CYTOLOGIA ◽  
2000 ◽  
Vol 65 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Pourali Safar ◽  
Khazab Mahmood ◽  
Kiabi Bahram ◽  
Sheidai Masoud
Keyword(s):  
Karyological Study ◽  
Two Populations

scholarly journals Sex chromosome diversification in the smooth snake Coronella austriaca (Reptilia, Serpentes)

2021 ◽  
Vol 16 (1) ◽  
pp. 37-44
Author(s):  
Marcello Mezzasalma ◽  
Gaetano Odierna
Keyword(s):  
Species Distribution ◽  
Sex Chromosome ◽  
W Chromosome ◽  
Geographical Pattern ◽  
Karyological Study ◽  
Genetic Lineages ◽  
Staining Methods ◽  
Sex Chromosome System ◽  
The Subject ◽  
Coronella Austriaca

The smooth snake Coronella austriaca is a widespread Palearctic colubrid species. The species has been the subject of several molecular and phylogeographic studies which highlighted the occurrence of distinct genetic lineages in different areas of the species distribution, but scarce cytogenetic data are currently available on the species. In this paper we present a molecular and karyological study performed with several banding, staining methods and NOR-FISH on samples of C. austriaca from different geographical areas (Italy and Greece) of the species distribution. The molecular and phylogenetic analysis unambiguously placed the studied samples in different clades with a clear geographical pattern. The karyotype of the two female samples studied was composed of 2n = 36 chromosomes with 16 macro- and 20 microchromosomes and a mix of plesiomorphic and derivate chromosome features. All macrochromosomes were biarmed with the exception of pair 5 that was telocentric. NORs were detected on a microchromosome pair. In both females, the pair 4 was heteromorphic (and completely heterochromatic after C-banding in the Italian female), representing the first report of a ZZ/ZW sex chromosome system with female heterogamety in C. austriaca. In addition, the W chromosome showed a different morphology between the two female studied (submetacentric and subtelocentric), highlighting the occurrence of a chromosomal diversification among distinct geographical areas of the species distribution and further supporting that the species contains different diverging evolutionary clades.

A karyological study of 55 species of birds, including karyotypes of 39 species new to cytology

Genetica ◽  
1984 ◽  
Vol 65 (1) ◽  
pp. 39-82 ◽  
Author(s):  
R. H. R. Belterman ◽  
L. E. M. De Boer
Keyword(s):  
Karyological Study
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