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Theoretical and Applied Genetics

, Volume 81, Issue 2, pp 245–252 | Cite as

Genetic linkage between C-bands and storage protein genes in chromosome 1B of tetraploid wheat

  • C. A. Curtis
  • A. J. Lukaszewski
Article

Summary

Genetic mapping of polymorphic C-bands allows direct comparisons between genetic and physical maps. Eleven C-bands and two seed storage protein genes on chromosome 1B, polymorphic between Langdon durum and four accessions of T. dicoccoides, were used to study the distribution of recombination along the entire length of the chromosome. Recombination in the short arm was almost completely restricted to the satellite, two-thirds of the arm's length from the centromere; the Gli-B1 gene was found to be tightly linked to the telomeric C-band. In the long arm, the distal 51.4% of the arm accounted for 88% of recombination; the proximal half of the arm accounted for the remaining 12%. While the amount of crossing-over differed significantly between the four T. dicoccoides 1B chromosomes, there were no significant differences in the relative distributions of crossing-over along the chromosome. Consequently, the genetic maps obtained from the four individual T. dicoccoides chromosomes were combined to yield a consensus map of 14 markers (including the centromere) for the chromosome.

Key words

Emmer wheats Chromosome 1B C-Bands Seed storage protein genes Mapping 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • C. A. Curtis
    • 1
  • A. J. Lukaszewski
    • 1
  1. 1.Department of Botany and Plant SciencesUniversity of CaliforniaRiversideUSA

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