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This article in CS

  1. Vol. 27 No. 3, p. 435-439
     
    Received: June 19, 1986
    Published: May, 1987


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doi:10.2135/cropsci1987.0011183X002700030002x

Primary Trisomics in Sugarbeet. II. Cytological Identification1

  1. I. Romagosa,
  2. L. Cistue,
  3. T. Tsuchiya,
  4. J. M. Lasa and
  5. R. J. Hecker2

Abstract

Abstract

Cytological identification of primary trisomics is an important part in the cytogenetic study of a species. The objective of this study was the Cytological identification of nine primary trisomic types in sugarbeet (Beta vulgaris L.). Karyotype analyses were conducted in somatic metaphase and late-prophase cells. All nine types of primary trisomics in sugarbeet were cytologically identified by means of somatic karyotype analysis. Not all extra chromosomes could be identified with certainty at metaphase because of their similarity in size and arm ratio. Somatic prophase analysis was found to be useful in confirming the results of metaphase analysis of the extra chromosome present in some trisomic types.

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