Nature 195, 1329 - 1330 (29 September 1962); doi:10.1038/1951329b0

Cytological Investigation of Triploid Sterility

J. YANNEY WILSON

Department of Botany, University of Ghana, Legon, Ghana.

THE problem of high sterility in triploids is well known since it is easily observed in practice. Most explanations of the cause have been genetical but a cytological follow-up often lends weighty support. So far cytological observations have shown that in triploids the extra (n) chromosome complement per pollen mother cell is shared between the two daughter nuclei at anaphase I in various proportions over and above the division of the basic diploid chromosome number. The movement of the chromosomes is at random so that when the daughter nuclei separate after anaphase II the pollen grains are produced with approximately binomial frequency distribution of the chromosome classes ranging from n to 2n chromosomes.

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