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Yield and Oil Content of Large and Small-Seed Rai-Mustard¹

Three cultivars of rai-mustard (Brassica juncea L. var. Rai) were studied to determine the effects of seed size on yield, yield components, and seed oil content. Seeds were screened to obtain small and large seeds, and were grown in the field at the Univ. of Kuwait, Kuwait, in 1978. At maturity, 20 plants were randomly-selected in each row and data were recorded on an individual plant basis. Highly significant differences in character performance, except for number of days-to-flowering and maturity, were observed between plants developed from large and small seeds. The large seeds produced plants with a larger number of primary and secondary branches per plant, more pods per plant, larger pods, heavier seeds, higher seed yield per plant, and higher percentage seed oil content than those developed from the smaller seeds, but had relatively fewer seeds per pod. Uniform seed size is important for agronomic and genetic studies in rai-mustard.

Key Words: Brassica juncea L. • Seed size • Yield components

² Associate professor of Genetics and Plant Breeding.

Received for publication March 5, 1979.