| In former studies on wheat x Aegilops hybrids low, sometimes no
germination was found (KASCHIRI 1974; KOZHAKMETOV & ERLEPESOV 1974). The
germination percentages of seeds varied greatly among the combinations;
e.g. very high germination, up to 100% was obtained in some crosses, while
some crosses exhibited very low percentages (Table
1, 2). Probably the main reasons for highseed set in wheat x Aegilops, were the crossing technique used and particularly, the climatic conditions prevailing during the crossing studies. The mean relative humidity and temperature in this period were 67% and 15C, respectively. It was concluded that ample seed set in wheat x Aegilops crosses can be expected using a proper crossing technique under convenient humidity and temperature conditions. Literature Cited DOSBA, F. & Y. CAUDERON 1972. A new interspecific hybrid: Triticum aestivum ssp. vulgare x Aegilops ventricosa. WIS. 35: 22-24. GOTSOV, K. & I. PANAYOTOV 1972. Natural hybridization of male sterile lines of common wheat x Ae. cylindrica Host. WIS. 33-34: 20-21. KASCHIRI, M. 1974. Kreuzungsexperimante zwischen. Weizen der Emmerreihe und Aegilops-Formen der Stopsis-Gruppe sowie cylogenetische Analyse triploider AEM BEM BSlT-Bastarde I. Ein Beitrag zur Phlogenie des Weizens. Z. Pflanzenzuchtg. 73: 217-232. KOZHAKMETOV, K. & A.M. ERLEPESOV 1974. The inviability of hybrid caryopses obtained by crossing durum wheats with species of the genus Aegilops. Plant Breed. Abs. (1977). 47: 1012. MAMMADOV, A.G. 1976. Distant hybridization in cereal crops. Plant Breed. Abs. (1978). 48: 7421. VARDI, A. 1973. Introgression between different ploidy levels in the wheat group. Plant Breed. Abs. (1975). 45: 6186. |
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