Theoretical and Applied Genetics

, Volume 81, Issue 1, pp 59–63

Cytological evidences of SDR-FDR mixture in the formation of 2n eggs in a potato diploid clone

  • C. Conicella
  • A. Barone
  • A. Del Giudice
  • L. Frusciante
  • L. M. Monti
Originals

DOI: 10.1007/BF00226112

Cite this article as:
Conicella, C., Barone, A., Del Giudice, A. et al. Theoret. Appl. Genetics (1991) 81: 59. doi:10.1007/BF00226112

Summary

Macrosporogenesis and microsporogenesis were investigated in a diploid S. tuberosum x S. chacoense potato hybrid, characterized by more than 50% 2n egg formation. Fifty-five percent of dyad formation of 2n macrospores is ascribed to two meiotic abnormalities: omission of the second meiotic division, occurring at a frequency of 38%, and irregular spindle axis orientation at metaphase I at a frequency of 16%: These abnormalities give origin to a mixture of 2n eggs, composed of mostly second division restitution (SDR) and a small portion of first division restitution (FDR). Microsporogenesis showed rare dyads of 2n microspores depending on parallel spindles observed in anaphase II.

Key words

Macrosporogenesis 2n egg SDR FDR Potato 

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • C. Conicella
    • 1
  • A. Barone
    • 2
  • A. Del Giudice
    • 2
  • L. Frusciante
    • 2
  • L. M. Monti
    • 2
  1. 1.Center of Vegetable Breeding, CNRPorticiItaly
  2. 2.Dept. of Agronomy Science and Plant GeneticsUniv. of NaplesPorticiItaly

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