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Inheritance of Maize Weevil Resistance in Maize¹

Ten, eight-line sets of dent maize inbreds (Zea mays L.) were tested for seed resistance to maize weevil (Sitophilus zeamais Motschulsky) in a design II experiment. The genetic variability was evaluated for maternal, cytoplasmic, and endosperm genotype sources. Dominance effects were important for seed resistance among sources segregating for maternal and endosperm genotypes. Most of the additive variation originated from maternal tissues, while cytoplasmic effects were unimportant. A procedure of recurrent selection within two breeding populations, with concomitant attention to crossbred performance, is suggested.

Key Words: Triploid tissue • Endosperm variability • Genetic variance and covariance • Kernel characters • Zea mays L. • Sitophilus zeamais Motschulsky

² Research geneticist, ARS, USDA, Tifton, GA 31794; professor of genet., N. C. State U., Raleigh, NC 27607; and research entomologist, ARS, USDA, stored-product insects res. and dev. lab., Savannah, GA 31403.

Received for publication September 30, 1974.

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