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Cyto-Histological Investigations of Pollen Abortion in Male-Sterile Sudangrass¹

Comparative morphological and cytological studies were made of anthers from a male-sterile and male-fertile line and a male-sterile and a male-fertile Ft hybrid of Sudangrass, Sorghum vulgare var. sudanense. Meiosis was normal in both male-fertile and male-sterile lines and normal tetrads were formed. Pollen abortion in male-sterile lines was associated with non-degeneration of the tapetal cells during the maturation of the young microspores, whereas, tapetal cells degenerated during similar maturation stages with production of normal pollen in malefertile lines.

Key Words: cytoplasmic male-sterility • anther morphology

² Graduate Assistant and Professor, North Dakota State University, Fargo.

Received for publication May 19, 1967.