Summary
The foregoing survey of the literature shows that translocations are of wide-spread occurrence in plants. Most of them have been found in the angiosperms: in 49 genera of dicots and 47 genera of monocots; but some have been reported in the gymnosperms (in two genera), also in the fungi. Studies at meiosis will undoubtedly reveal translocations in many other species, either in occasional plants or in different groups isolated geographically. In certain cases they seem to have played a part in the evolution of present karyotypes. In a number of cases, the presence of translocations has not been definitely established, but they are one possible explanation of the observed configurations.
The survey reveals the need for additional detailed studies of interchanges. What accounts for directed segregation in the interchange rings in certain species? For each of the factors which has been suggested there is one or more species which does not behave in the predicted manner. Experimentally produced interchanges in other species having these features would be useful; also in species having directed segregation of the sex chromosomes. A discussion of how they have been and how they might be used as tools in the investigation of other cytological and cytogenetic problems and also certain applications to practical breeding have been included.
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Contribution of the Department of Agronomy and Plant Genetics, University of Minnesota, Institute of Agriculture, St. Paul 1, Minnesota. Miscell. Journal Series No. 890, Agricultural Experiment Station.
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Burnham, C.R. Chromosomal interchanges in plants. Bot. Rev 22, 419–552 (1956). https://doi.org/10.1007/BF02872484
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DOI: https://doi.org/10.1007/BF02872484