Theoretical and Applied Genetics

, Volume 76, Issue 4, pp 593–600 | Cite as

Brassica taxonomy based on nuclear restriction fragment length polymorphisms (RFLPs)

2. Preliminary analysis of subspecies within B. rapa (syn. campestris) and B. oleracea
  • K. M. Song
  • T. C. Osborn
  • P. H. Williams


Preliminary analysis using nuclear RFLPs provided evidence that subspecies within Brassica rapa originated from two different centers. One center is in Europe, represented by turnip and turnip rape from which the oilseed sarson was derived. A second center is in South China containing a variety of Chinese vegetables of which pak choi and narinosa seem to be the most ancient forms. Based on RFLP data, the accessions of B. oleracea examined could be divided into three distinct groups, represented by thousand head kale, broccoli and cabbage. Thousand head kale and Chinese kale appear to be the primitive types. Observations of parallel variation among subspecies of both species are discussed.

Key words

Brassica rapa Brassica oleracea Molecular taxonomy Phylogenetic tree Restriction fragment length polymorphism 


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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • K. M. Song
    • 1
    • 2
  • T. C. Osborn
    • 2
  • P. H. Williams
    • 1
  1. 1.Department of Plant PathologyUniversity of WisconsinMadisonUSA
  2. 2.Department of AgronomyUniversity of WisconsinMadisonUSA

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