M. Asghar
Nuclear Institute for Agriculture and Biology (NIAB), P. O. Box 128 Faisalabad, Pakistan
A. R. Rao
Department of Botany, University of Agriculture, Faisalabad-38040, Pakistan
S. Farooq
Nuclear Institute for Agriculture and Biology (NIAB), P. O. Box 128 Faisalabad, Pakistan
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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How to cite this article
M. Asghar, A. R. Rao and S. Farooq, 2001. Evidence of Homoeologous Relationship Between Chromosomes of Wheat and of Aegilops geniculata. Pakistan Journal of Biological Sciences, 4: 411-413.
DOI: 10.3923/pjbs.2001.411.413
URL: https://scialert.net/abstract/?doi=pjbs.2001.411.413
DOI: 10.3923/pjbs.2001.411.413
URL: https://scialert.net/abstract/?doi=pjbs.2001.411.413
REFERENCES
- Charpentier, A., M. Feldman and Y. Cauderon, 1988. The effect of different doses of Ph-1 on chromosome pairing in hybrids between tetraploid Agropyron elongatum and common wheat. Genome, 30: 974-977.
Direct Link - Feldman, M., 1966. The effect of chromosome 5B, 5D and 5A on chromosomal pairing in Triticum aestivum. Proc. Natl. Acad. Sci. USA., 55: 1447-1454.
Direct Link - Snow, R., 1963. Alcoholic hydrochloric acid-carmine as a stain for chromosomes in squash preparations. Stain Technol., 38: 9-13.
PubMedDirect Link - Farooq, S., E. Askari, A.A. Zaidi and T.M. Shah, 1997. The wild Aegilops and sustainable agriculture: Achievements and anticipations at NIAB. Proceedings of the International Conference on Sustainable Agriculture, for Food, Energy and Industry: Strategies Towards Achievements, June 22-26, Braunshweig, Germany, pp: 662-668.