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The Botanical Review

, Volume 64, Issue 4, pp 372–417 | Cite as

A critical review of concepts and methods used in classical genome analysis

  • Ole Seberg
  • Gitte Petersen
Article

Abstract

A short account of the development of classical genome analysis, the analysis of chromosome behaviour in metaphase I of meiosis, primarily in interspecific hybrids, is given. The application of the concept of homology to describe chromosome pairing between the respective chromosomes of a pair during meiosis is traced, and the relationship between this use of homology and the concept of homology as common ancestry is discussed at length. To equate the two concepts has led to the erroneous assumption that levels of chromosome pairing is an indication of phylogenetic relationship.

Even accepting the fundamental premises, genome analysis is burdened by observational difficulties. Hence, chromosome pairing has been shown to be under genetic control and is also influenced by environmental conditions. Additionally, basic biological observations such as the distribution of meiotic configurations or the identity of the individual chromosomes are frequently neglected.

Data from chromosome pairing are captured as pair-wise comparisons and are amenable only to phenetic analysis, and hence are not suited for phylogenetic inferences. As currently perceived, genome analysis may have a role to play in plant breeding but it has no place in systematics. With an increased knowledge and understanding of the mechanism behind meiosis, data useful in a systematic context may eventually be produced.

Keywords

Genome Analysis Botanical Review Chromosome Pairing Synaptonemal Complex Meiotic Chromosome 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The New York Botanical Garden 1998

Authors and Affiliations

  • Ole Seberg
    • 1
  • Gitte Petersen
    • 1
  1. 1.Botanical InstituteUniversity of CopenhagenCopenhagen KDenmark

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