Karyotype evolution in Curimatidae (Teleostei, Characiformes) from the Amazon region. II. Centric fissions in the genus Potamorhina
Keyword(s):
M 10
◽
Using cytogenetic analysis following Giemsa staining, nucleolar organizer region (NOR) staining, and C-banding, three distinct karyotypes in three species of curimatids belonging to the fish genus Potamorhina were identified: 2n = 54/44 M + 10 SM (P. pristigaster), 2n = 56/52 M + 2 SM + 2 ST (P. latior), and 2n = 102/2 M + 2 SM + 98 A (P. altamazonica). A 2n = 54 was considered to be the ancestral diploid number and the different karyotypes were probably the result of centric fissions. Both the NOR pattern and constitutive heterochromatin pattern are species specific.Key words: centric fissions, karyotypic evolution, Amazon fish, Curimatidae.
2014 ◽
Vol 74
(1)
◽
pp. 251-256
◽
1998 ◽
Vol 255
(2)
◽
pp. 74-76
◽
2001 ◽
Vol 30
(4)
◽
pp. 193-199
◽
2005 ◽
Vol 32
(5)
◽
pp. 323-328
◽
Keyword(s):
2016 ◽
Vol 22
(3)
◽
pp. 621-629
◽
2015 ◽
Vol 146
(4)
◽
pp. 296-305
◽