Use of an Alien Cytoplasm as a New Method of Producing Haploids

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Abstract
Frequencies of haploid occurrence in nucleus-substitution lines of Triticum vulgare var. erythrospermum and Taylor''s Triticale having the cytoplasm of Aegilops caudata were investigated to compare with those found in the ordinary strains. The haploid occurrence in SB lines of Taylor''s Triticale (53%) was more frequent than that obtained in SB lines of T. vulgare var. erythrospermum (1.7%). No haploids were found in the respective control. The results observed suggested that different genotypes responded differently to the same alien cytoplasm in regard to parthenogenetic development of the embryos. It was concluded that the use of an alien cytoplasm provided a new means for artificial production of haploids.

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