6Chase S S.Production of homozygous diploids of maize from monoploids. Agron J, 1952,44:263-267.
7Zabirova E R,Shatskaya 0 A,Shcherbak V S.Line 613/2 as a source of a high frequency of spontaneous diploidization in corn.Maize Genet Coop News Lett, 1993,67 : 67.
8Gayen P,Sarkar K.Cytomixis in maize haploid.Indian J Genet PI Br, 1996, 56 ( 1 ): 79-85.
9Stadler J,Phillips R,Leonard M.Mitotic blocking agents for suspension cultures of maize ' Black Mexican Sweet' cell lines.Genome, 1989,32: 475-478.
10Beaumont V H,Widholm J M.Ploidy variation of pronamidetreated maize ealli during long term culture.Plant Cell Rep, 1993,12:648-651.
