Nearly Total Absence of Homoeologous Pairing in a Hybrid between Tetraploid Hordeum chilense and Triticum aestivum |
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Authors: | W. Pohler O. Schrader |
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Affiliation: | Dr. Wolfgang;Pohler, Dr. Otto Schrader, Institut für Züchtungsforschung, E.-u.-J.-Rosenberg-Str. 22/23, Quedlinburg, DDR-4300 (German Democratic Republic) |
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Abstract: | A hybrid between an induced tetraploid of Hordeum chilense (2n = 28 = HchHchHchHch) and Triticum aestivum var. ‘Chinese Spring’ (2n = 42 = AABBDD) has been produced to test gene effects of this wild barley on homoeologous pairing in wheat. Cytological investigations in metaphase I have shown that the hybrid, which is perennial like H. chilense but morphologically more similar to the wheat parent, possesses the expected genome composition HchHch ABD and a stable euploid chromosome number of 2n = 35. Pairing among the homologous H. chilense chromosomes was almost complete. The level of non-homologous chromosome association proved to be lower than the range of pairing known from euhaploids of ‘Chinese Spring’. |
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Keywords: | Hordeum chilense Triticum aestivum intergeneric hybrid pairing regulation |
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