Chromosomal variation in social voles: a Robertsonian fusion in Günther’s vole

2012 ◽  
Vol 58 (3) ◽  
pp. 255-265 ◽  
Author(s):  
Jan Zima ◽  
Atilla Arslan ◽  
Petr Benda ◽  
Miloš Macholán ◽  
Boris Kryštufek
Keyword(s):  
Chromosomal Variation ◽  
Robertsonian Fusion

Chromosomal evolution and biogeography of collared lemmings (Dicrostonyx) in the eastern and High Arctic of Canada

1993 ◽  
Vol 71 (8) ◽  
pp. 1481-1493 ◽  
Author(s):  
Oksana A. Borowik ◽  
Mark D. Engstrom
Keyword(s):  
Sex Chromosome ◽  
Chromosomal Evolution ◽  
High Arctic ◽  
Chromosomal Variation ◽  
Robertsonian Fusion ◽  
Banding Patterns ◽  
Dicrostonyx Groenlandicus ◽  
Chromosomal Differentiation ◽  
Chromosomal Data ◽  
Primitive State

Chromosomal variation was examined in 10 populations of Dicrostonyx in the eastern and High Arctic of Canada to determine the extent and nature of chromosomal variation and to examine chromosomal differentiation within and among species and subspecies. Chromosomal data are presented for two species of collared lemmings, D. hudsonius and D. groenlandicus, including D. g. groenlandicus, D. g. clarus, and D. g. lentus. Standard, G-banded, and C-banded karyotypes revealed variation among populations of D. groenlandicus due to Robertsonian fusions and the addition of B chromosomes. G-banding revealed complete homologous banding patterns of autosomal arms between D. groenlandicus and D. hudsonius; however, sex chromosome constitution differed between the two species. Dicrostonyx groenlandicus possesses a neo-XY, formed by a Robertsonian fusion of the sex chromosomes and a pair of autosomes. The neo-XY does not occur in D. hudsonius, and this absence appears to be the primitive state for the genus.

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

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 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
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