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Wheat lines carrying a single Agropyron elongation (Host.) P.B. chromosome either as a monosomic substitution or as a recombined wheat – Agropyron chromosome exhibited an abnormally high frequency of transfer of this chromosome to their progeny. This was due to a high frequency of preferential transmission of the chromosome or the wheat–Agropyron chromosome through the female side which was accompanied by low seed fertility. It is suggested that the chromosome carries a gene which induces preferential abortion of gametes that do not carry it. The occurrence of such genes in a number of species and their significance are discussed.
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Scoles et al. (1983) studied this question.
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