Chiasma and recombination data in plants: are they compatible?

Trends Genet. 1993 Oct;9(10):344-8. doi: 10.1016/0168-9525(93)90038-j.


It has long been considered that the number of chiasmata formed during meiosis corresponds to the number of crossovers indicated by the genetic map. However, recent investigations in plants show an unexpected discrepancy in the results obtained when calculating the total number of crossover events per meiosis by these two methods. Is this discrepancy due to methodological difficulties? Or is there something fundamentally wrong with our understanding of crossovers and chiasmata?

Publication types

  • Review

MeSH terms

  • Crossing Over, Genetic
  • Meiosis / genetics*
  • Plants / genetics*
  • Recombination, Genetic*