Simultaneous visualization of different genomes (J, JSt and St) in a Thinopyrum intermedium × Thinopyrum ponticum synthetic hybrid (Poaceae) and in its parental species by multicolour genomic in situ hybridization (mcGISH)

Klaudia Kruppa, Márta Molnár-Láng

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Multicolour genomic in situ hybridization (mcGISH) using total genomic DNA probes from Thinopyrum bessarabicum (Savulescu & Rayss, 1923) á. Löve, 1984 (genome Jb or Eb, 2n = 14), and Pseudoroegneria spicata (Pursh, 1814) á. Löve, 1980 (genome St, 2n = 14) was used to characterize the mitotic metaphase chromosomes of a synthetic hybrid of Thinopyrum intermedium (Host, 1805) Barkworth & D.R. Dewey, 1985 and Thinopyrum ponticum (Podpera, 1902) Z.-W. Liu et R.-C. Wang, 1993 named "Agropyron glael" and produced by N.V. Tsitsin in the former Soviet Union. The mcGISH pattern of this synthetic hybrid was compared to its parental wheatgrass species. Hexaploid Th. intermedium contained 19 J, 9 JSt and 14 St chromosomes. The three analysed Th. ponticum accessions had different chromosome compositions: 43 J + 27 JSt (PI531737), 40 J + 30 JSt (VIR-44486) and 38 J + 32 JSt (D-3494). The synthetic hybrid carried 18 J, 28 JSt and 8 St chromosomes, including one pair of J-St translocation and/or decreased fluorescent intensity, resulting in unique hybridization patterns. Wheat line Mv9kr1 was crossed with the Thinopyrum intermedium × Thinopyrum ponticum synthetic hybrid in Hungary in order to transfer its advantageous agronomic traits (leaf rust and yellow rust resistance) into wheat. The chromosome composition of a wheat/A. glael F1 hybrid was 21 wheat + 28 wheatgrass (11 J + 14 JSt+ 3 S). In the present study, mcGISH involving the simultaneous use of St and J genomic DNA as probes provided information about the type of Thinopyrum chromosomes in a Th. intermedium/Th. ponticum synthetic hybrid called A. glael.

Original languageEnglish
Pages (from-to)283-293
Number of pages11
JournalComparative Cytogenetics
Volume10
Issue number2
DOIs
Publication statusPublished - Jan 1 2016

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Keywords

  • Agropyron glael
  • J
  • J
  • Multicolour GISH
  • St genomes
  • Thinopyrum intermedium
  • Thinopyrum ponticum

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Genetics
  • Plant Science

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