Somaclonal chromosome variation in tetraploid alfalfa

F. Feher, M. Hangyel Tarczy, I. Bocsa, D. Dudits

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The detailed characterization of chromosomal status of in vitro cultured alfalfa tissues revealed considerable pre-existing variation. Aneuploidy and mixoploidy were already detected in plants propagated by nodal cutting or developed from seeds. During callus induction and maintenance, a definite increase in polyploidy and aneuploidy was observed within the first few days of culturing. The high proportion of aneuploid and polyploid cells did not affect the regeneration potential but embryogenic selection against the deviation from the euploid stage was apparent. After somatic embryogenesis, the chromosome variation among the somaclones was strongly influenced by the chromosome number of the explants. We found the extreme stability of the 2n = 30 chromosome set. Based upon the cytological features described, tetraploid alfalfa is suggested as a typical representative of the polysomatic/aneusomatic plant species.

Original languageEnglish
Pages (from-to)91-99
Number of pages9
JournalPlant Science
Volume60
Issue number1
DOIs
Publication statusPublished - 1989

Keywords

  • alfalfa
  • aneuploidy
  • chromosome variation
  • polyploidy
  • somatic embryogenesis

ASJC Scopus subject areas

  • Genetics
  • Agronomy and Crop Science
  • Plant Science

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