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Presence of the Transposable Element Uq in Maize Breeding Material

Garst Seed Co., Slater, IA 50244
Dep. of Statistics, Iowa State Univ.
Dep. of Agronomy, Dep. of Genetics, Iowa State Univ., Ames, IA 50011

^* Corresponding author.

The insertion and excision of transposable elements often lead to alterations in the base pair sequence of a gene. This could contribute to polymorphism and genetic variation in maize (Zea mays L.) germplasm. The objective of this experiment was to establish whether or not breeding material that showed genetic variability contained the transposable element Uq. Populations and inbred lines were crossed with a genetic tester containing c-ruq, the receptor for Uq. Populations that contained the element Uq include Iowa Stiff Stalk Synthetic, Burrs White, Hays Golden, Iowa Long Ear, Lancaster, Kolkmeier, and Bsll. The inbred I159 also contained Uq. This study screened for only one of nine genetically characterized elements. The absence of Uq does not indicate the absence of other known or unknown elements.

Received for publication October 7, 1987.

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