1971 Volume 36 Issue 2 Pages 304-308
F1 hybrid between M. arvensis sub. sp. haplocalyx Briq. var. piperascens Holmes and M. longifolia (Linn.) Huds. was produced. The hybrid is inter-mediate in morphological characters between the two parents and is completely sterile. The detailed cytology of the hybrid and the parents is described. The genome present in M. longifolia has no homology with any of the genomes present in M. arvensis sub. sp. haplocalyx var. piperascens.