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Some Genetic Relationships Between Gland Density and Gossypol Content in Gossypium hirsutum L.¹

The experimental cotton line 247-1 (Gossypium hirsutum L.) is heavily glanded and has a high gossypol level in flower buds. The most logical (but not the only) interpretation of data from crosses of 247-1 and stocks homozygous for various combinations of gland-determining alleles at the gl₁ gl₂, and gl₃, loci was that the high-gossypol content of 247-1 could be explained by the presence of a high-potency allele at the gl₃ locus, plus another factor, or factors, independent of the gland-determining alleles.

Key Words: Host-plant resistance • Cotton

² Research geneticist and former agricultural research technician, respectively, Western Cotton Research Laboratory, ARS-USDA, 4135 E. Broadway Rd., Phoenix, AZ 85040. Present address of junior author: Jornado Experiment Range, USDA-ARS, P. O. Box C98, Las Cruces, NM 88001.

Received for publication February 18, 1976.