Diploid Chromosome Number and Chromosomal Variation in the White Rhinoceros (Ceratotherium simum)

2009 ◽  
Vol 61 (1) ◽  
pp. 45-48
Author(s):  
Coşkun Tez ◽  
Akalin Hilal ◽  
Münife Erkekkardeş

The chromosomes of goitered gazelle, Gazella subgutturosa, in Turkey were karyotyped on the basis of two female specimens. Bothspecimens have 2n = 30 with NF = 60 and NFa = 56. All chromosomes are biarmed. The two female specimens of Turkish G. subgutturosa have a smaller diploid chromosome number compared to those of two males previously reported. This chromosomal variation in Turkish G. subgutturosa may be important for its conservation biology.


2021 ◽  
Vol 52 (2) ◽  
Author(s):  
Kyle A. Donnelly ◽  
Michele A. Miller ◽  
Douw Grobler ◽  
Peter Buss ◽  
Charles Van Niekerk ◽  
...  

2015 ◽  
Vol 51 (4) ◽  
pp. 916-922 ◽  
Author(s):  
Michele Miller ◽  
Peter Buss ◽  
Rachel Wanty ◽  
Sven Parsons ◽  
Paul van Helden ◽  
...  

2014 ◽  
Vol 56 (2) ◽  
pp. 124-132 ◽  
Author(s):  
Robert J. Dudley ◽  
Simon P. Wood ◽  
John R. Hutchinson ◽  
Renate Weller

2018 ◽  
Vol 70 (3) ◽  
pp. 443-447
Author(s):  
Jelena Blagojevic ◽  
Marija Rajicic ◽  
Vladimir Jovanovic ◽  
Tanja Adnadjevic ◽  
Ivana Budinski ◽  
...  

Arvicoline voles are known as a karyotypically extremely polymorphic group in which the genus Microtus leads with the highest rate of karyotype change. A member of this genus, the European pine vole Microtus subterraneus (de Selys-Longchamps, 1836), is widely distributed in Europe and parts of Asia. There are two cytotypes differing in diploid chromosome number, 2n=54 and 52, each showing different chromosomal polymorphisms. At two localities in southeastern Serbia, Mt. Jastrebac and Vlasina, we found the 2n=52 cytotype. Meiotic preparations from males revealed the presence of asynaptic sex chromosomes. Although asynaptic sex chromosomes are frequent in Microtus, this is the first finding for M. subterraneus. From summarized data it appears that two-thirds of the studied species, mainly from Microtus and Terricola subgenera, possess asynaptic sex chromosomes.


1983 ◽  
Vol 98 (2) ◽  
pp. 283-NP ◽  
Author(s):  
A. P. F. Flint ◽  
R. D. Burton ◽  
R. B. Heap

Concentrations of progesterone in arterial and ovarian, uterine and jugular venous plasma were determined in four Barbary sheep at various stages of pregnancy. The results, together with ovarian histology, show that the corpus luteum regresses before term in Barbary sheep, as in most breeds of domestic ewes. Uterine synthesis of progesterone was demonstrated in late pregnancy in two animals in which uterine venous levels of progesterone were increased two- to fourfold above arterial concentrations. The placenta contained 3β-hydroxysteroid dehydrogenase. Barbary sheep (diploid chromosome number, 2N = 58) therefore resemble the domestic sheep (2N = 54) rather than the goat (2N = 60) from the point of view of the source of the progesterone required for maintenance of pregnancy.


PLoS ONE ◽  
2018 ◽  
Vol 13 (7) ◽  
pp. e0200347 ◽  
Author(s):  
Emma H. Hooijberg ◽  
Michele Miller ◽  
Carolyn Cray ◽  
Peter Buss ◽  
Gerhard Steenkamp ◽  
...  

1994 ◽  
Vol 85 (4) ◽  
pp. 255-260 ◽  
Author(s):  
M. Schmid ◽  
W. Felchtinger ◽  
I. Nanda ◽  
R. Schakowski ◽  
R. Visbal Garcia ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document