Cytomixis has been described in many plant species, but not in Thinopyrum. The present study reports spontaneous cytomixis during microsporogenesis in Thinopyrum intermedium (2n = 42), Thinopyrum ponticum (2n = 70), and their F1 hybrids with wheat. Cytomixis frequently occurred in early prophase I but very rarely in meiosis II. The type of cytomixis that occurred most often was where chromatins migrate from one nucleus into an adjacent cel1. Migration from one nucleus into two or more cells or from two or more nuclei into one cel1 was also observed. After a donor cell transferred chromatin to a recipient cell, the recipient cell would sometimes pass the chromatin on to another cell. Migration did not necessarily occur between cells in the same stage. Cytomixis in Th. ponticum and its hybrids with wheat was more complex than that in Th. intermedium. The possible causes, cytological consequences and genetic significance of cytomixis are discussed.
Bell, C.R. 1964. Cytomixis in Tauschia nudicaulis Schlecht (Apiaceae). Cytologia 29:369–398.
Bellucci, M., Roscini, C., Mariani, A. 2003. Cytomixis in pollen mother cells of Medicago sativa L. Journal of Heredity 94:512–516.
Bobak, M., Herich, R. 1978. Cytomixis as a manifestation of pathological changes after the application of trifluraline. Nucleus 21:22–26.
Boldrinia, K.R., Pagliarinia, M.S. 2006. Cell fusion and cytomixis during microsporogenesis in Brachiaria humidicola (Poaceae). South African Journal of Botany 72:478–481.
Chen, Q., Collin, J., Comeau, A., St-Pierre, C.A., Fedak, G. 1997. Comparison of various sources of resistance to barley yellow dwarf virus in wheat — Thinopyrum amphiploid lines. Can. J. Plant Pathol. 19:414–417.
Cheng, K.C., Nieh, H.W., Yang, C.L. 1975. Light and electron microscopical observations on cytomixis and the study of its relation to variation and evolution. Acta Bot. Sin. 17:60–69.
Cooper, D.D. 1952. The transfer of deoxyribose nucleic acid from the tapetum to the microsporocytes at onset of meiosis. Am. Nat. 86:219–229.
de Souza, A.M., Pagliarini, M.S. 1997. Cytomixis in Brassica napus var. oleifera and Brassica campestris var. oleifera (Brassicaceae). Cytologia 62:25–29.
Falistocco, E., Tosti, N., Falcinelli, M. 1995. Cytomixis in pollen mother cells of diploid Dactylis, one of the origins of 2n gametes. J. Hered. 86:448–453.
Fedak, G. 1999. Molecular aids for integration of alien chromatin through wide crosses. Genome 42:584–591.
Friebe, B., Jiang, J.M., Raupp, W.J., McIntosh, R.A., Gill, B.S. 1996. Characterization of wheat-alien translocations conferring resistance to disease and pests: Current status. Euphytica 91:59–87.
Gates, R.R. 1911. Pollen formation in Oenothera gigas. Annals of Botany 25:909–940.
Ghanima, A.M., Talaat, A.A. 2003. Cytomixis and its possible evolutionary role in a Kuwaiti population of Diplotaxis harra (Brassicaceae). Botanical Journal of the Linnean Society 143:169–175.
Gottschalk, W. 1970. Chromosome and nucleus migration during microsporogenesis of Pisum sativum. Nucleus 13:1–9.
Guo, G.Q., Zheng, G.C. 2004. Hypotheses for the functions of intercellular bridges in male germ cell development and its cellular mechanisms. Journal of Theoretical Biology 229:139–146.
Heslop-Harrison, J. 1966. Cytoplasmic connections between angiosperm meiocytes. Ann. Bot. 30:221–230.
Jiang, J.M., Friebe, B., Gill, B.S. 1994. Recent advances in alien gene transfer in wheat. Euphytica 73:199–212.
Körnicke, M. 1901. Über Ortsveränderung von Zellkärnern S.B. Niederrhein. Ges. Natur- und Heilkunde, Bonn A:14–25.
Kostritsyna, T.V., Soldatov, I.V. 1991. Cytomixis in apical meristems of Prunus domestica L. × Perisca vulgaris Mill. hybrid shoots. Genetica 27:1790–1794.
Kwiatkowska, M., Poplónska, K., Wojtczak, A. 2003. Chara tomentosa antheridial plasmodesmata at various stages of spermatogenesis. Biol. Plant 46:233–238.
Lattoo, S.K., Khan, S., Bamotra, S., Dhar, A.K. 2006. Cytomixis impairs meiosis and in?uences reproductive success in Chlorophytum comosum (Thunb) Jacq. — an additional strategy and possible implications. J. Biosci. 31:629–637.
Mantu, D.E., Sharma, A.K. 1983. Cytomixis in pollen mother cells of an apomictic ornamental Ervatamia divaricata (Linn.) Alston. Cytologia 48:201–207.
Marzenna, G., Adam, W. 2005. Cytomixis in shoot apex of Norway spruce [Picea abies (L.) Karst.]. Trees 18:722–724
Muranty, H., Sourdille, P., Bernard, S., Bernard, M. 2002. Genetic characterization of spontaneous diploid androgenic wheat and triticale plants. Plant Breed 121:470–474.
Omara, M.K. 1976. Cytomixis in Lolium perenne. Chromosoma 55:267–271.
Patra, N.K., Chauhan, S.P., Srivastava, H.K. 1986. Syncites with premeiotic mitotic and cytomictic comportment in opium poppy (Papaver somniferum L.). Indian J. Genet. 47:49–54.
Pierozzi, N.I., Benatti, J.R. 1998. Cytological analysis in the microsporogenesis of ramie, Boehmeria nivea Gaud. (Urticaceae) and the effect of colchicine on the chiasma frequency. Cytologia 63:213–221.
Sarvella, P. 1958. Cytomixis and loss of chromosomes in meiotic and somatic cells of Gossypium. Cytologia 23:14–24.
Soodan, A.S., Waffai, B.A. 1987. Spontaneous occurrence of cytomixis during microsporogenesis in almond (Prunus amygdalus Batsch) and peach (P. persica Batsch). Cytologia 52:361–364.
Srivastav, P.K., Raina, S.N. 1980. Cytomixis in Clitoria ternantea L. var. pleniflora Fantz. f. pleniflora. Curr. Sci. 49:824–835.
Tariq, A.B., Sahba, P., Ainul, H.K. 2006. MMS-Induced cytomixis in pollen mother cells of broad bean (Vicia faba L.) Turk J. Bot. 30:273–279.
Tarkowska, J. 1960. Cytomixis in the epidermis of scales and leaves and in meristems of root apex of Allium cepa L. Acta Soc. Bot. Polon. 29:149–168.
Tarkowska, J. 1973. The nature of cytomixis. Caryologia (Suppl) 25:151–157.
Ventela, S., Toppari, J., Parvinen, M. 2003. Intercellular organelle traffic through cytoplasmic bridges in early spermatids of the rat: mechanisms of haploid gene product sharing. Mol. Biol. Cell 14:2768–2780.
Wang, H.G., Qi, Z.J., Kong, F.J., Gao, J.R., Kong, L.R. 1998. Cytological characteristic on microsporogenesis and male gametophyte development of (T. aestivum / E. elongata) F 1. Acta Botanica Boreali-Occidenatalia Sinica 18(1):14–18.
Wang, H.G., Kong, L.R., Li, P.L., Qi, Z. J., Liu, S.B., Kong, F.J., Zhu, J. 1999. Studies of cytogenetic and traits characteristics on the offspring between Elytrigia intermedium and Triticum aestivum. Acta Agronomica Sinica 25:373–380.
Wang, R.R.C. 1988. Coenocytism, ameiosis, and chromosome diminution in intergeneric hybrids in the perennial Triticeae. Genome 30:766–775.
Wang, R.R.C., Liang, G.H. 1977. Cytogenetic location of genes for resistance to wheat streak mosaic in an Agropyron substitution line. J. Hered. 68:375–378.
Wang, R.R.C., Li, X.M., Hu, Z.M., Zhang, J.Y., Larson, S.R., Zhang, X.Y., Grieve, C.M., Shannon, M.C. 2003. Development of salinity-tolerant wheat recombinant lines from a wheat disomic addition line carrying a Thinopyrum junceum chromosome. Int. J. Plant Sci. 164:25–33.
Zhang, W.C. 2002. Progress in research on intercellular movement of protoplasm in higher plants. Acta Bot. Sin. 44:1068–1074.
Zheng, G.C., Yang, Q., Zheng, Y. 1987. The relationship between cytomixis, chromosome mutation and karyotype evolution in Lily. Caryologia 40:243–259.
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Li, X.F., Song, Z.Q., Feng, D.S. et al. Cytomixis in Thinopyrum intermedium, Thinopyrum ponticum and its hybrids with wheat. CEREAL RESEARCH COMMUNICATIONS 37, 353–361 (2009). https://doi.org/10.1556/CRC.37.2009.3.4
- chromatin migration