Spontaneous germinal activation of quiescent Uq transposable elements in Zea mays L.

摘要: The spontaneous germinal activation of quiescent Uq transposable elements is reported. Thirty-nine spotted exceptions were observed at a rate about 2 x 10(-4) from 687 otherwise colorless ears produced the cross a-ruq/a-ruq (colorless or occasionally sectored) X an a-ruq tester (colorless). All had spotting patterns distinct pattern our original standard (Uq1)-a-ruq spotting. From these five new (Uq2, Uq3, Uq4, Uq5 and Uq6) have been isolated. Genetic evidence for nature isolates presented. First, each was homozygous reporter allele. Second, four Uq4 Uq5), after being reconstituted into alpha degrees sh2/alpha sh2 (no Uq) line, could transactivate allele continue to produce their phenotypes. Third, Uqs are also capable transactivating c-ruq65 c-ruq67 alleles. However, transactivation c-ruq generally weaker than that a-ruq.