Chromosomal Variation in Bats of the Genus Uroderma (Phyllostomatidae)

1970 ◽  
Vol 51 (4) ◽  
pp. 786-789 ◽  
Author(s):  
R. J. Baker ◽  
G. Lopez
Keyword(s):  
Chromosomal Variation

scholarly journals Temporal fluctuations of Y-chromosomal variation in Bos taurus

2008 ◽  
Vol 4 (6) ◽  
pp. 752-754 ◽  
Author(s):  
Emma Svensson ◽  
Anders Götherström
Keyword(s):  
Single Nucleotide Polymorphism ◽  
Bos Taurus ◽  
Demographic History ◽  
Northern Europe ◽  
Chromosomal Gene ◽  
Chromosomal Variation ◽  
Nucleotide Polymorphism ◽  
Single Nucleotide ◽  
Domestic Species ◽  
History Of

Phylogeography has recently become more abundant in studies of demographic history of both wild and domestic species. A single nucleotide polymorphism (SNP) in the intron of the Y-chromosomal gene UTY19 displays a north–south gradient in modern cattle. Support for this geographical distribution of haplogroups has previously also been seen in ancient cattle from Germany. However, when analysing 38 historic remains of domestic bulls and three aurochs from northern Europe for this SNP we found no such association. Instead, we noted extensive amounts of temporal variation that can be attributed to transportation of cattle and late breed formation.

Cryptic chromosomal variation in suni Neotragus moschatus (Artiodactyla, Bovidae)

1998 ◽  
Vol 1 (2) ◽  
pp. 95-100 ◽  
Author(s):  
S. C. Kingswood ◽  
A. T. Kumamoto ◽  
S. J. Charter ◽  
M. L. Jones
Keyword(s):  
Chromosomal Variation

scholarly journals Intrapopulational genetic differentiation in Anopheles (N.) darlingi Root, 1926 (Diptera: Culicidae) in the amazon region

1999 ◽  
Vol 22 (3) ◽  
pp. 325-331 ◽  
Author(s):  
Joselita Maria Mendes dos Santos ◽  
Jorge Arturo Lobo ◽  
Wanderli Pedro Tadei ◽  
Eucleia P. Betioli Contel
Keyword(s):  
Genetic Differentiation ◽  
Central Region ◽  
Amazon Basin ◽  
Amazon Region ◽  
Anopheles Darlingi ◽  
Chromosomal Variation ◽  
Geographical Differentiation ◽  
Marginal Populations ◽  
Polymorphic Loci

Four natural Amazonian Anopheles darlingi populations were analyzed for 19 loci, 12 of which showed variation, i.e., 68.4% of polymorphic loci. The Ariquemes, Rondônia, population was the most variable, with a large number of alleles per locus (2.26 ± 0.27) and high polymorphism (P = 63.15). The highest values of observed and expected intralocus heterozygosity were observed in the Manaus, Amazonas, population (Ho = 0.432 ± 0.11; He = 0.375 ± 0.08), and the lowest in the Cachoeira Porteira, Pará, population (Ho = 0.236 ± 0.09; He = 0.290 ± 0.11). Wright's F-statistic revealed disequilibrium caused by an excess of homozygotes, as shown by the Fis > Fst values (Fis = 0.083 > 0.026) reflecting intrapopulational differentiation. The four populations studied were genetically similar, as indicated by distance and similarity values. Chromosomal variation of Amazon population also did not indicate geographical differentiation, and populations in the central region of the Amazon Basin showed high polymorphism in relation to the marginal populations, which were mainly monomorphic.

scholarly journals Correction: Y Chromosomal Variation Tracks the Evolution of Mating Systems in Chimpanzee and Bonobo

PLoS ONE ◽  
2010 ◽  
Vol 5 (11) ◽  
Author(s):  
Felix Schaller ◽  
Antonio M. Fernandes ◽  
Christine Hodler ◽  
Claudia Münch ◽  
Juan J. Pasantes ◽  
...  
Keyword(s):  
Mating Systems ◽  
Chromosomal Variation

CHROMOSOMAL VARIATION IN GUAYULE AND MARIOLA

1944 ◽  
Vol 35 (6) ◽  
pp. 163-172 ◽  
Author(s):  
G. LEDYARD STEBBINS ◽  
MASUO KODANI
Keyword(s):  
Chromosomal Variation

scholarly journals Chromosomal Differentiation in Genetically Isolated Populations of the Marsh-Specialist Crocidura suaveolens (Mammalia: Soricidae)

Genes ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 270 ◽  
Author(s):  
Francisca Garcia ◽  
Luis Biedma ◽  
Javier Calzada ◽  
Jacinto Román ◽  
Alberto Lozano ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Habitat Specialization ◽  
Evolutionary Significance ◽  
Chromosomal Variation ◽  
Gulf Of Cadiz ◽  
Habitat Specialist ◽  
Isolated Populations ◽  
Distributional Range ◽  
Gulf Of Cádiz ◽  
Chromosomal Differentiation

The genus Crocidura represents a remarkable model for the study of chromosome evolution. This is the case of the lesser white-toothed shrew (Crocidura suaveolens), a representative of the Palearctic group. Although continuously distributed from Siberia to Central Europe, C. suaveolens is a rare, habitat-specialist species in the southwesternmost limit of its distributional range, in the Gulf of Cádiz (Iberian Peninsula). In this area, C. suaveolens is restricted to genetically isolated populations associated to the tidal marches of five rivers (Guadiana, Piedras, Odiel, Tinto and Guadalquivir). This particular distributional range provides a unique opportunity to investigate whether genetic differentiation and habitat specialization was accompanied by chromosomal variation. In this context, the main objective of this study was to determinate the chromosomal characteristics of the habitat-specialist C. suaveolens in Southwestern Iberia, as a way to understand the evolutionary history of this species in the Iberian Peninsula. A total of 41 individuals from six different populations across the Gulf of Cádiz were collected and cytogenetically characterized. We detected four different karyotypes, with diploid numbers (2n) ranging from 2n = 40 to 2n = 43. Two of them (2n = 41 and 2n = 43) were characterized by the presence of B-chromosomes. The analysis of karyotype distribution across lineages and populations revealed an association between mtDNA population divergence and chromosomal differentiation. C. suaveolens populations in the Gulf of Cádiz provide a rare example of true karyotypic polymorphism potentially associated to genetic isolation and habitat specialization in which to investigate the evolutionary significance of chromosomal variation in mammals and their contribution to phenotypic and ecological divergence.

Chromosomal Variation in the Plains Pocket Gopher, Geomys bursarius major

1973 ◽  
Vol 54 (3) ◽  
pp. 765 ◽  
Author(s):  
Robert J. Baker ◽  
Stephen L. Williams ◽  
John C. Patton
Keyword(s):  
Chromosomal Variation ◽  
Pocket Gopher ◽  
Geomys Bursarius
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