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Pakistan Journal of Biological Sciences
Year: 2001  |  Volume: 4  |  Issue: 4  |  Page No.: 411 - 413

Evidence of Homoeologous Relationship Between Chromosomes of Wheat and of Aegilops geniculata

M. Asghar, A. R. Rao and S. Farooq    

Abstract: Intergeneric hybrids were produced between hexaploid wheat variety Chinese Spring and five different accessions of Aegilops geniculata; 2n=4x=28 CUCUMOMO (Aegilops ovata). The objective was to detect differences in chromosomal associations at meiotic metaphase-1 in the Fl hybrids using squash preparations of prefixed immature anthers. Chromosome pairing between all the hybrids raged between 35 univalents to 3 rod bivalents except for hybrid between Chinese Spring x Ae. geniculata accession 361881. This hybrid exhibited chromosome pairing up to 4 rod bivalents, 1 ring bivalent and 2 trivalents with the chiasma frequency of 4.10 per cell. This indicated possibilities of homoeologous chromosome pairing and genetic exchange between chromosomes of wheat and of Ae. geniculata. Significance of this pairing and the potential of Ae. geniculata for improvement of stress tolerance in wheat would be discussed in detail.

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