ISSN:
1573-4927
Keywords:
CARASSIUS AURATUS
;
TETRAPLOID
;
HEXAPLOID
;
MITOCHONDRIAL DNA
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract A survey of restriction fragment polymorphism inmitochondrial DNA of three subspecies of Carassiusauratus throughout four provinces in China wasundertaken using 17 restriction enzymes. Two carp,Cyprinus carpio rubbrofuscus and Cyprinuscarpio carpio, were included as the outgroup. Atotal of 16 haplotypes was observed: 5 in tetraploids ofC. auratus auratus; 8 in hexaploids of C.auratus auratus; and 2 in C. auratus gibelio and C.auratus cuvieri, respectively. The tetraploids andhexaploids share three common haplotypes as I, V, andVI. C. a. Cuvieri may have diverged first amongthe three subspecies. Interestingly, C. a. auratus andC. a. cuvieri did not form monophyletic clades,which indicated that the classification of Carassiusauratus required further studies. The currenthypothesis, that hexaploids originated from tetraploids by a polyploidyevent, is less favorable, based on the distribution ofhaplotypes and the lower diversity in tetraploids thanin hexaploids. Our data also indicate that divergence of hexaploids and tetraploids might be recentand mtDNA polymorphism existed before the divergence.Meanwhile, genetic isolation exists between thehexaploids and the tetraploids.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018751008848
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