ISSN:
1615-6110
Keywords:
Angiosperms
;
Rutaceae
;
Cytoevolution
;
chromosome base numbers
;
dysploidy
;
polyploidy
;
cladistics
;
gondwanan forests
;
heathlands
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Chromosome numbers for 9 tribes and 73 genera ofRutaceae are examined for the probable chromosome base numbers in these taxa. There is abundant dysploidy and infrageneric polyploidy in the largeRutoideae/Toddalioideae complex. We found that x = 18 was typical for the tribesZanthoxyleae andToddalieae; probably ancestral in theBoronieae and perhaps in theRuteae, Diosmieae, andCusparieae; and characteristic of subfamilyFlindersioideae. Considering the basic position of elements ofZanthoxyleae andToddalieae in the family it appears that diploid x = 18 is ancestral in theRutaceae. The morphologically advancedCitroideae are invariant for x = 9 and may be a product of dysploid reduction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00994089
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