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Evaluation of Eleven Introductions of Crambe, Crambe abyssinica Hochst¹

Eleven crambe introductions grown in 14- and 38-inch rows in southern and northcentral Indiana in 1964 were evaluated for number of branches and seed pods in different regions of the plant, plant height, weight of seed pods and seeds per volume of seed pods, and yield. A highly significant difference between the two locations was found for most characters. Different row spacings significandy affected most of the characters measured. However, variation among introductions was significant only for the number of branches attached to the lowest 4 inches of the main stem and the number of primary branches on the whole plant.

Plant-to-plant variation within introductions in wide rows was heterogeneous for number of primary branches and seed pods in the lower regions of the plant.

Desirable plant habit for combine harvest is possible with the material available by using appropriate cultural practices and selecting among and/or within introductions. For yield, however, to insure an effective improvement program in crambe, additional introductions of new diverse material or the possible development of more variable populations by hybridization seems necessary.

² Graduate Assistant and Associate Professors of Agronomy.

Received for publication May 2, 1966.