A ZZ/ZW sex chromosome system in Cheirodontinae fish.
|
Accession number;02A0931252
|
| Title;A ZZ/ZW sex chromosome system in Cheirodontinae fish. |
| Author;
WASKO A P
(Univ. Estadual Paulista, Sp, Bra)
CESAR A C G
(Univ. Federal De Sao Carlos, Sp, Bra)
MARTINS C
(Univ. Estadual Paulista, Sp, Bra)
GALETTI P M JR
(Univ. Federal De Sao Carlos, Sp, Bra)
|
Journal Title;Chromosome Sci
|
Journal Code:S0638B
|
ISSN:1344-1051
|
|
VOL.5;NO.3;PAGE.145-148(2001)
|
| Figure&Table&Reference;FIG.1, REF.16 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Cytogenetic studies were carried out on two Neotropical fish species of the subfamily Cheirodontinae. Odontostilbe paranensis and Holoshestes heterodon, from Mogi-guacu River(Brazil), were characterized by 2n=52 chromosomes. Males of O. paranensis showed 18 meta-submetacentric, six subtelocentric and two acrocentric chromosome pairs, resulting in a fundamental number of 100. Females of this species presented a karyotype composed of 18 meta-submetacentric pairs, six subtelocentric pairs, one acrocentric pair and also one medium submetacentric chromosome and one medium acrocentric element. The karyotype of females of H. heterodon presented 18 meta-submetacentric, six subtelocentric and one acrocentric chromosome pairs, and two single small chromosomes-a metacentric one and an acrocentric element. A fundamental number of 101 was detected on females of both species. The present results suggest the occurrence of ZZ/ZW sex chromosomes on these two species, characterized by an acrocentric Z chromosome and by a morphologically variable W chromosome. (author abst.) |
|
|
|
Related Articles;
|
|
