Studies on chloroplast and nuclear rDNA in hexaploid bread wheat and its relatives

Szabolcs Rudnóy, Zoltán Bratek, E. Páldi, Ilona Rácz, Demeter Lásztity

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Though allohexaploid bread wheat (Triticum aestivum) is grown on more acreage than any other cereal crop, its evolutionary history and origin of its three genomes have not been cleared up in every detail. The wheats form a polyploid series with diploid, tetraploid and hexaploid forms. Hexaploid wheats (AABBDD) may have evolved by hybridization between the AABB tetraploid as cytoplasm donor and the D genome diploid Aegilops tauschii. The origin of B genome is still a matter of debate. In the present study sequences of chloroplast and nuclear rDNA regions were used for giving new data to contribute to our knowledge on evolution of wheat. Analysis of cloned nrITS sequences of T. aestivum showed that 1) more than one ITS sequence type can be derived from the same sample, 2) a rye chromosome element formerly introgressed into wheat genome can be detected and 3) a partial segment of ITS similar to that of einkorn wheats (AA genome) can be identified. These results give evidences for ancient and recent introgressions and could help us to identify all of the three genomes of hexaploid bread wheat.

Original languageEnglish
Pages (from-to)35-36
Number of pages2
JournalActa Biologica Szegediensis
Volume49
Issue number1-2
Publication statusPublished - 2005

Fingerprint

Bread
Chloroplasts
hexaploidy
Ribosomal DNA
Triticum
chloroplasts
Genes
wheat
genome
Genome
Tetraploidy
tetraploidy
diploidy
Triticum aestivum
Diploidy
Triticum monococcum subsp. monococcum
Aegilops tauschii
Chromosomes
Crops
grain crops

Keywords

  • Genomes
  • nrITS
  • Progenitors
  • Wheat

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Cell Biology
  • Neuroscience(all)
  • Applied Microbiology and Biotechnology

Cite this

Studies on chloroplast and nuclear rDNA in hexaploid bread wheat and its relatives. / Rudnóy, Szabolcs; Bratek, Zoltán; Páldi, E.; Rácz, Ilona; Lásztity, Demeter.

In: Acta Biologica Szegediensis, Vol. 49, No. 1-2, 2005, p. 35-36.

Research output: Contribution to journalArticle

Rudnóy, S, Bratek, Z, Páldi, E, Rácz, I & Lásztity, D 2005, 'Studies on chloroplast and nuclear rDNA in hexaploid bread wheat and its relatives', Acta Biologica Szegediensis, vol. 49, no. 1-2, pp. 35-36.
Rudnóy, Szabolcs ; Bratek, Zoltán ; Páldi, E. ; Rácz, Ilona ; Lásztity, Demeter. / Studies on chloroplast and nuclear rDNA in hexaploid bread wheat and its relatives. In: Acta Biologica Szegediensis. 2005 ; Vol. 49, No. 1-2. pp. 35-36.
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