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Inheritance of a Brachytic Character in Soybeans¹

An F₃ soybean [Glycine max (L.) Merr.] breeding line (D74-BH) was crossed with the cultivar ‘Tracy’ to study the inheritance of a brachytic character. D74-BL-4 was only 59% as tall as Tracy, but had a similar number of nodes. Average plant height and node number of the F₁ plants were slightly greater than those of Tracy. Segregation for the brachytic character fit a 3:1 ratio in the F₃ population, and F₃ lines segregated in a 1:2:1 ratio. The data indicate that the brachytic character is controlled by a single recessive gene. The gene symbol sb is proposed.

Key Words: Glycine max (L.) Merr. • Short internodes

² Geneticist, ARS-USDA, Stoneville, MS 38776.

Received for publication May 16, 1977.