“Complement fractionation” in natural diploid orchid species
Document Type
Article
Publication Date
1-1-1982
Abstract
Four out of 10 diploid orchid species showed “complement fractionation” a complex cytological phenomenon, hitherto reported only in polyploid plants. The manifestation of this phenomenon during meiosis is the formation of chromosome subgroups resulting eventually in cells with more than the usual four sporads; five or six being the optimum number in the investigated orchid species. No implications whatsoever can be deduced as to the genetic or genomic constitution of the end products. The presence of the phenomenon in these orchid species could perhaps indicate a polyploid ancestry or concealed hybridity. The operation of “complement fractionation”, however, could be interpreted as an alternative evolutionary pathway opposed to polyploidy.
Keywords
Complement fractionation, Excess sporads, Diploid orchid species, Phaius tribe Evolution
Divisions
InstituteofBiologicalSciences
Publication Title
Theoretical and Applied Genetics
Volume
61
Issue
1
Publisher
Springer Verlag
Additional Information
Teoh, S.B. Department of Genetics and Cellular Biology, University of Malaya, Kuala Lumpur, Malaysia.