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Genetics of Leaf Pubescence in Durum Wheat¹

The genetics of leaf pubescence in the durum wheat (Triticum turgidum L.) cultivar ‘P.I. 181000’ was studied in the F₁, F₂, and backcross-F₁ populations of crosses with two glabrous cultivars. Examination of density of pubescence in the F₁ indicated that the density level of the pubescent parent is dominant. Data for presence or absence of pubescence in segregating populations indicated that three genes control the presence of pubescence in P.I. 181000. It is postulated that these same genes may be operating in an additive manner to determine length of pubescence. The relatively simple inheritance of this character indicates that a backcross program can be used to transfer pubescence to commercial cultivars.

Key Words: Cereal leaf beetle • Oulema melanopa (L) • Insect resistance • Plant breeding

² Crop Scientist, Canada Department of Agriculture, Winnipeg, Manitoba.

Received for publication December 7, 1972.

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