Abstract
Guizotia abyssinica, G. schimperi and G. scabra are diploid species (2n=2x=30) characterised by 15 bivalents during prophase-I/metaphase-I of meiosis. The former species is cultivated whereas the latter two are wild. Interspecific hybrids between these three species were generated and the F1 hybrids were analysed to assess cytogenetic relationships and crop evolution within the genus Guizotia. Meiotic chromosome configurations at diakenesis/metaphase-I in the pollen mother cells of hybrids averaged 0.25I + 14.60II + 0.15IV for G. abyssinica x G. schimperi, 0.05I + 13.6II + 0.14III + 0.58IV for G. abyssinica x G. scabra, and 0.8I + 12.7II + 0.08III + 0.88IV for G. schimperi x G. scabra. Based upon the results of our investigations we conclude that the genomes of G. abyssinica and G. schimperi are similar and homologous, whereas the G. scabra genome is only partially homologous to that of G. abyssinica/G. schimperi. Furthermore, the crop species G. abyssinica might have originated from G. schimperi through selection and cultivation; chromosome translocations appear to have played a significant role in the divergence and differentiation of these three species.
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References
Baagoe J (1974) The genus Guizotia (Compositae). A taxonomic revision. Bot Tidsskrift 69:1–39
Bothmer RV, Jacobsen N (1986) Interspecific crosses in Hordeum (Poaceae). Pl Syst Evol 153:49–64
Grant WF (1987) Genome differentiation in higher plants. In: Urbanska KM (ed) Differentiation patterns in higher plants. Academic Press, London, pp 9–32
Greilhuber J, Ehrendorfer F (1988) Karyological approaches to plant taxonomy. ISI Atlas Sci: Plants and Animals 1: 289–297
Hiremath SC, Murthy HN (1986) The structure, stability and meiotic behaviour of B-chromosome in Guizotia scabra (Vis.) Chiov. ssp. scabra (Compositae). Caryologia 39:397–402
Hiremath SC, Murthy HN (1988) Domestication of niger (Guizotia abyssinica). Euphytica 37:225–228
Hiremath SC, Murthy HN (1992) Cytogenetical studies in Guizotia (Asteraceae). Caryologia 45:69–82
Hiremath SC, Salimath SS (1992) The ‘A’ genome donor of Eleusine coracana (L.) Gaertn. (Gramineae). Theor Appl Genet 84:747–754
Hiremath SC, Murthy HN, Salimath SS (1992) Quantitative nuclear DNA differences associated with genome evolution in Guizotia (Compositae). Genetica 85:241–247
Jackson RC (1985) Genomic differentiation and its effect on gene flow. Sysematic Bot 10:391–404
Jauhar PP, Crane CF (1989) An evaluation of Baum et al.'s assessment of the genomic system of classification in the Triticeae. Am J Bot 76:571–576
Kihara H (1930) Genomanalyse bei Triticum and Aegilops. I. Cytologia 2:106–156
Kimber G, Alonso LC, Sallee PJ (1981) The analysis of meiosis in hybrids. I. Can J Genet Cytol 23:209–213
Leggett JM (1983) Chromosome relationships and morphological comparisons in the hybrids Avena hybrida x A. sativa and A. hybrida x A. maroccana. Can J Genet Cytol 25:225–260
Murthy HN (1987) Cytogenetical studies in Guizotia Cass. (Compositae). PhD thesis, Karnatak University, Dharwad, India
Riley KM, Belayneh H (1989) Niger. In: Robbelen G, Downey RK, Ashir A (eds) Oil crops of the world: their breeding and utilization. McGraw Hill, New York, pp 394–403
Seegler CJW (1983) Oil plants in Ethiopia, their taxonomy and agricultural significance. Center for Agricultural Publishing and Documentation, Wageningen, pp 122–146
Singh AK (1986) Utilization of wild relatives in the genetic improvement of Arachis hypogaea L. 7. Autotetraploid production and prospects in interspecific breeding Theor Appl Genet 72:164–169
Singh RJ, Hymowitz T (1985) The genomic relationships among six wild perennial species of the genus Glycine subgenus Glycine willd. Theor Appl Genet 71:221–230
Wang RRC (1988) An assessment of genome analysis based on chromosome pairing in hybrids of perennial triticeae. Genome 32:179–189
Weiss EA (1983) Oil crops. Longmann, London
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Murthy, H.N., Hiremath, S.C. & Salimath, S.S. Origin, evolution and genome differentiation in Guizotia abyssinica and its wild species. Theoret. Appl. Genetics 87, 587–592 (1993). https://doi.org/10.1007/BF00221882
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DOI: https://doi.org/10.1007/BF00221882