Intergeneric hybridization between Taeniatherum and different genera of Triticeae, Poaceae |
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| Authors: | S Frederiksen R von Bothmer |
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| Institution: | Botanical Laboratory, Univ. of Copenhagen, Gothersgade 140, DK-1123 Copenhagen K, Denmark.;Dept of Crop Genetics and Breeding, Swedish Univ. of Agricult. Sciences, S-268 00 Svalöv, Sweden. |
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| Abstract: | Intergeneric crosses were carried out between the 3 subspecies of Taeniatherum caput-medusae (2x) and 30 different species (33 different cytotypes) representing 11 genera of the Triticeae. Seed set was obtained in 15 combinations, but only 6 of them resulted in adult plants. In the combination with Hordeum bulbosum (2x), a haploid of T. caput-medusae was obtained as a result of selective elimination of the H. bulbosum chromosomes. All other hybrid plants were morphologically intermediate between the parents. They were highly sterile with low pollen fertility caused by very low chromosome pairing at meiosis and without any seed set.
The few hybrid plants obtained and the lack of pairing at meiosis support that Taeniatherum is a distinct genus within the Triticeae. |
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