Abstract
Chromosome number in Hordeum vulgare x H. bulbosum hybrids ranged between the haploid and diploid number but with peaks in frequency occurring at the 14 and 7 chromosome level. This was reflected in a gradual change from hybrid morphology to that of haploid H. vulgare. The rate of chromosome elimination differed significantly between hybrids, while within each hybrid, differences in mean chromosome number were recorded between and within individual tillers. An increase in temperature from 25–30° C caused a significant increase in the rate of elimination of H. bulbosum chromosomes.
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Bennett, M.D., Finch, R.A., Barclay, I.R.: The time rate and mechanism of chromosome elimination in Hordeum hybrids. Chromosoma (Berl.) 54, 175–200 (1976)
Brown, R.: The effects of temperature on the duration of the different stages of cell division in the root tip. J. exp. Bot. (Lond.) 2, 96–110 (1951)
Evans, H.J., Savage, J.R.K.: The effect of temperature on mitosis and on the action of colchicine in root meristem cells of Vicia faba. Exp. Cell Res. 18, 51–61 (1959)
Ho, K.M., Kasha, K.J.: Genetic control of chromosome elimination during haploid formation in barley. Genetics 81, 263–275 (1975)
Jensen, C.J.: Production of monoploids in barley: a progress report, pp. 167–197. In: Polyploidy and induced mutations in plant breeding. Vienna: IEAE 1974
Kao, K.N., Kasha, K.J.: Haploidy from interspecific crosses with tetraploid barley. In: Barley genetics (R.A. Nilan, ed.), Vol. 11, pp. 82–88. Washington State University Press 1969
Kasha, K.J., Kao, K.N.: High frequency haploid production in barley (Hordeum vulgare L.). Nature (Lond.) 225, 876–877 (1970)
Kasha, K.J., Sadasivaiah, R.S.: Genome relationships between Hordeum vulgare L. and Hordeum bulbosum L. Chromosoma (Berl.) 35, 264–287 (1971)
Lange, W.: Cytogenetisch en embryologish onderzoeck aan kruisingen tussen Hordeum vulgare en H. bulbosum. Versl. landbouwk. Onderz 719, pp. 182 (1969) (Dutch with English summary)
Lange, W.: Crosses between Hordeum vulgare L. and Hordeum bulbosum L. I. Production, morphology and meiosis of hybrids, haploids and dihaploids. Euphytica 20, 14–19 (1971)
Lange, W., Jochemsen, G.: Karyotypes, nucleoli, and amphiplasty in hybrids between Hordeum vulgare L. and Hordeum bulbosum L. Genetica 46, 217–233 (1976)
Morgan, W.G.: A technique for the production of polyploids in grasses. Euphytica 25, 443–446 (1976)
Pickering, R.A., Hayes, J.D.: Partial incompatibility in crosses between Hordeum vulgare L. and Hordeum bulbosum L. Euphytica 25, 671–678 (1976)
Subrahmanyam, N.C., Kasha, K.J.: Selective chromosomal elimination during haploid formation in barley following interspecific hybridization. Chromosoma (Berl.) 42, 111–125 (1973)
Symko, S.: Haploid barley from crosses of Hordeum bulbosum (2 x) x Hordeum vulgare (2 x). Canad. J. Genet. Cytol. 11, 602–608 (1969)
Wimber, D.E.: Duration of the nuclear cycle in Tradescantia root tips at three temperatures as measured with H3-thymidine. Amer. J. Bot. 53, 21–25 (1966)
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Humphreys, M.W. Chromosome instability in Hordeum vulgare x H. bulbosum hybrids. Chromosoma 65, 301–307 (1978). https://doi.org/10.1007/BF00286410
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DOI: https://doi.org/10.1007/BF00286410