Karyotypic Variation in the Pocket Mice Perognathus amplus and P. longimembris

1992 ◽  
Vol 73 (3) ◽  
pp. 625-629 ◽  
Author(s):  
M. L. McKnight ◽  
M. R. Lee
Keyword(s):  
Karyotypic Variation

scholarly journals Chromosomal Instability at Fragile Sites in Blue Foxes, Silver Foxes, and Their Interspecific Hybrids

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1743
Author(s):  
Marta Kuchta-Gładysz ◽  
Ewa Wójcik ◽  
Anna Grzesiakowska ◽  
Katarzyna Rymuza ◽  
Olga Szeleszczuk
Keyword(s):  
Interspecific Hybrids ◽  
Genome Stability ◽  
Diploid Number ◽  
Fragile Sites ◽  
B Chromosomes ◽  
Silver Fox ◽  
Chromosomal Breaks ◽  
Blue Fox ◽  
Chromosomal Fragile Sites ◽  
Karyotypic Variation

A cytogenetic assay based on fragile sites (FS) enables the identification of breaks, chromatid gaps, and deletions. In healthy individuals, the number of these instabilities remains low. Genome stability in these species is affected by Robertsonian translocations in the karyotype of the blue fox and by B chromosomes in the silver fox. The aims of the study were to characterise the karyotype of blue foxes, silver foxes, and their hybrids and to identify chromosomal fragile sites used to evaluate genome stability. The diploid number of A chromosomes in blue foxes ranged from 48 to 50, while the number of B chromosomes in silver foxes varied from one to four, with a constant number of A chromosomes (2n = 34). In interspecific hybrids, both types of karyotypic variation were identified, with the diploid number of A chromosomes ranging from 40 to 44 and the number of B chromosomes varying from 0 to 3. The mean frequency of FS in foxes was 4.06 ± 0.19: 4.61 ± 0.37 in blue foxes, 3.46 ± 0.28 in silver foxes, and 4.12 ± 0.22 in hybrids. A relationship was identified between an increased number of A chromosomes in the karyotype of the hybrids and the frequency of chromosomal breaks. The FS assay was used as a biomarker for the evaluation of genomic stability in the animals in the study.

Karyotypic variation in Chilean lizards of the genusLiolaemus (Iguanidae)

1979 ◽  
Vol 35 (5) ◽  
pp. 593-595 ◽  
Author(s):  
Madeleine Lamborot ◽  
A. Espinoza ◽  
E. Alvarez
Keyword(s):  
Karyotypic Variation

Karyotypic variation in the stingless bee Trigona spinipes (Hymenoptera: Apidae: Meliponini) from different geographical regions of Brazil

Apidologie ◽  
2021 ◽  
Author(s):  
Mara Garcia Tavares ◽  
Riudo de Paiva Ferreira ◽  
Natália Martins Travenzoli ◽  
Denilce Meneses Lopes
Keyword(s):  
Stingless Bee ◽  
Geographical Regions ◽  
Karyotypic Variation

scholarly journals Low courtship song variation in South and Southeastern Brazilian populations of Drosophila meridionalis (Diptera, Drosophilidae)

2000 ◽  
Vol 60 (1) ◽  
pp. 53-61 ◽  
Author(s):  
C. T. A. COSTA ◽  
G. C. S. KUHN ◽  
F. M. SENE
Keyword(s):  
South America ◽  
Taxonomic Status ◽  
Wide Distribution ◽  
Courtship Song ◽  
Southeastern Brazil ◽  
Metaphase Chromosomes ◽  
Song Variation ◽  
Chromosomal Variability ◽  
Karyotypic Variation ◽  
Brazilian Populations

Drosophila meridionalis is a cactus-breeding species with a wide distribution in South America. Most populations of this species are geographically isolated, what provides a promising scenario for studying evolution. Former studies of this species revealed a remarkable karyotypic variation among its populations. Up to six distinct metaphase chromosomes were described, showing that this species is polymorphic at least at the chromosomal level. In order to elucidate the taxonomic status of populations showing different metaphase chromosomes, we analyzed the courtship song of five populations of D. meridionalis in South and Southeastern Brazil. In addition, we analyzed the metaphase chromossomes of each population. Our results show that, despite the two karyotype observed, most courtship song parameters did not vary among the populations. Altogether, our results suggest that D. meridionalis from South and Southeastern Brazil represents one species with an inter-population chromosomal variability.

Karyotypic Variation inScindapsus OfficinalisSchott (Aroideae)

Caryologia ◽  
1957 ◽  
Vol 9 (2) ◽  
pp. 286-292 ◽  
Author(s):  
U. C. Bhattacharyya
Keyword(s):  
Karyotypic Variation
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