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A New Source of Cytoplasmic—Genic Male Sterility in Pearl Millet¹

A male-sterile plant was discovered in a population of ‘ex-Bornu’‘gero’ pearl millet [Pennisetum americanum (L.) Leeke] of northern Nigeria in which male sterility had not previously been found. To determine the relationship between the ex-Bornu source of male sterility and the three known male-sterility sources in pearl millet, ‘gero-l’ and ‘gero-2’, two plants that were good maintainers for male-sterile ex-Bornu, were each crossed with three pearl millet lines namely Tilt 23A₁, 239A₂, and 426A₃, which represented the known malesterility sources in pearl millet. Gero-1 and gero-2 were good maintainers for 426A₃ and 239A₂, respectively, but neither was a good maintainer for all three sources. The results suggest a new pearl millet male-sterility source operating in ex-Bornu.

Key Words: Pennisetum americanum (L.) Leeke • Gero pearl millet

² Senior lecturer and professor of plant breeding. Dep. of Agronomy, Univ. of Ibadan, Ibadan, Nigeria.

Received for publication December 22, 1980.