Cross-compatibility of Elymus humidus and F1 hybrid plants with Triticum and Hordeum
1993
Muramatsu, M. (Okayama Univ. (Japan). Faculty of Agriculture) | Nakatsuji, R. | Nagata, M. | Yanagihara, K. | Tonai, N.
Intergeneric crosses were made using Elymus humidus Osada (2n=6x=42) as female to Triticum aestivum (2n=6x=42), Hordeum vulgare (2n=2x=14) and Leymus mollis (2n=4x=28) in the 1991 spring season. The rate of seed set was higher in the cross combination with Hordeum than with Triticum. Embryo rescue was necessary because of abortive endosperm of hybrid seeds. Out of 575 florets pollinated with Triticum, six F1 plants were obtained, and out of 163 with Hordeum, 23 F1 plants were obtained. Hybrid plants with T. aestivum had 2n=42 chromosomes, the expected chromosome number from both parents, and were completely male sterile, but some BF1 seeds were obtained by backcrossing with pollen from the Triticum parent. In the hybrid plants with H. vulgare, the somatic chromosome number varied among individuals, as well as root tip cell within a plant, except for one plant that had an aneuploid number of 2n=24. In the cross with L. mollis, ten florets were crossed, but the two hybrid seeds obtained did not germinate by embryo rescue
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