Chromosomal nucleolar organizer regions in four sturgeon species as markers of karyotype evolution in Acipenseriformes (Pisces).
Identifieur interne : 000250 ( Ncbi/Checkpoint ); précédent : 000249; suivant : 000251Chromosomal nucleolar organizer regions in four sturgeon species as markers of karyotype evolution in Acipenseriformes (Pisces).
Auteurs : F. FontanaSource :
- Genome [ 0831-2796 ] ; 1994.
Abstract
Nucleolar organizer regions in Acipenser ruthenus (2n = 118 +/- 4) are localized on the telomeric regions of two morphologically different pairs of chromosomes. In A. baeri (2n = 250 +/- 8), A. transmontanus (2n = 248 +/- 8), and A. naccarii (2n = 246 +/- 8) they are localized on eight chromosomes arranged in two quadruplets. Contrary to what is commonly accepted, such distribution suggests that species with 120 chromosomes should be considered diploids and species with 240-250 chromosomes should be considered tetraploid.
PubMed: 18470132
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