Summary
The maize Enhancer transposable element can be targeted to any locus and many unstable alleles have been isolated. Normally, the result is an autonomously controlled allele leading to the mutability expression that is coordinately inherited with this locus. In this study, six alleles at the c locus (c-m) autonomously controlled by En, gave rise to a modified expression (original pattern of mutability, coarse is modififed to fine) that is under the control of a factor, segregating independently. This factor modifies the coarse pattern to fine by delaying the early occurring mutation events (c→C) during kernel development leading to the appearance of relatively sharp colored spots. This factor shows En-like activity but is limited to the pattern differentiatio of any one of the progenitor c-m alleles. These source c-m alleles are not affected by the standard En. A model is presented to support the hypothesis that this factor is a modified En with an altered mutator (M) effect and thus delays the M effect on the coarse allele. This altered En allele can be considered as En-Malt.
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References
Ahmed A, Bidwell K, Musso R (1981) Internal rearrangements of IS2 in Escherichia coli. Cold Spring Harbor Symp Quant Biol 45:141–152
Berg DE (1977) Insertion and excision of the transposable Kanamycin resistance determinant Tn5. In: Bukhari A, Shapiro JA, Adhya S (eds) DNA insertion elements, plasmids and episomes. Cold Spring Harbor Press, Cold Spring Harbor, NY, pp 205–212
Biek D, Roth JR (1981) Regulation of Tn5 transposition. Cold Spring Harbor Symp Quant Biol 45:189–191
Brink RA (1954) Very light variegated pericarp in maize. Genetics 39:724–740
Brink RA, Nilan RA (1952) The relation between light variegated and medium variegated pericarp in maize. Genetics 37:519–544
Brink RA, Williams E (1973) Mutable R-Navajo alleles of cyclic origin in maize. Genetics 73:273–296
Burr B, Burr F (1981) Controlling element events at the Shrunken locus in maize. Genetics 98:143–156
Burr B, Burr F (1982) Ds controlling elements of maize at the Shrunken locus are large and dissimilar insertions. Cell 29:977–986
Courage-Tebbe, U, Doring H-P, Fedoroff N, Starlinger P (1983) The controlling element Ds as the Shrunken locus in Zea Mays; structure of the unstable sh-m5933 allele and several revertants. Cell (in press)
Döring H-P, Geiser M, Starlinger P (1981) Transposable element Ds at the Shrunken locus in Zea mays. Mol Gen Genet 184:377–380
Fincham JRS, Sastry GRK (1974) Controlling elements in maize. Annu Rev Genet 8:15–50
Fowler RG, Peterson PA (1974) The a 2 m(r-pa-pu) allele of the En controlling element system in maize. Genetics 76:433–446
Friedemann P (1981) Dosage effect of Uq on the mutability pattern. Maize Genet Coop Newsl 55:6–7
Friedemann P, Peterson PA (1982) The Uq controlling element system in maize. Mol Gen Genet 187:19–29
Gonella JA, Peterson PA (1977) Controlling elements in a tribal maize from Colombia: Fcu, a two-unit system. Genetics 85:629–645
Greenblatt I (1974) Movement of Modulator in maize: A test of an hypothesis. Genetics 77:671–678
Greenblatt I, Brink RA (1962) Transposition of modulator in maize into divided and undivided chromosome segments. Nature (London) 197:412–413
Kamp D, Kahmann R, Zipser D, Broker TR, Chow LT (1978) Inversion of the G DNA of phage Mu Controls phage infectivity. Nature [London] 271:577–580
Kleckner N (1981) Transposable elements in prokaryotes. Annu Rev Genet 15:341–404
McClintock B (1949) Mutable loci in maize. Carnegie Inst Washington Yearb 48:142–154
McClintock B (1951) Chromosome Organization and genic expression. Cold Spring Harbor Symp Quant Biol 16:13–47
McClintock B (1955) Controlled mutation in maize. Carnegie Inst Washington Yearb 54:245–255
McClintock B (1964) Aspects of gene regulation in maize. Carnegie Inst Washington Yearb 63:592–602
McClintock B (1965a) Components of action of the regulators Spm and Ac. Carnegie Inst Washington Yearb 64:527–537
McClintock B (1965b) The control of gene action in maize. Brookhaven Symp Biol 18:162–184
McClintock B (1967) Regulation of pattern of gene expression by controlling elements in maize. Carnegie Inst Washington Yearb 65:568–578
McClintock B (1968) The states of a gene locus in maize. Carnegie Inst Washington Yearb 66:20–28
Nevers P, Saedler H (1977) Transposable genetic elements as agents of gene instability and chromosomal rearrangements. Nature (London) 269:109–115
Nowick EM, Peterson, PA (1981) Transposition of the enhancer controlling element system in maize. Mol Gen Genet 183:440–448
Nuffer MG (1955) Dosage effect of multiple Dt loci on mutation of a in the maize endosperm. Science 121:399–400
Peterson PA (1961) Mutable al of the En system in maize. Genetics 46:759–771
Peterson PA (1963) Influence of mutable genes on induction of instability in maize. Proc Iowa Acad Sci 70:129–134
Peterson PA (1965) A relationship between the Spm and En control systems in maize. Am Nat 99:391–398
Peterson PA (1968) The origin of an unstable locus in maize. Genetics 59:391–398
Peterson PA (1970) The En mutable system in maize. III. Transposition associated with mutational events. Theor Appl Genet 40:367–377
Peterson PA (1976a) Changes in the state following transposition of a regulatory element of the Enhancer system in maize. Genetics 84:469–483
Peterson PA (1976b) Basis for the diversity of states of controlling elements in maize. Mol Gen Genet 149:5–21
Peterson PA (1977) The position hypothesis for controlling elements in maize. In: Bukhari AI, Shapiro JA, Adhya S (eds) DNA insertion elements, plasmids and episomes. Cold Spring Harbor Laboratory, Cold Spring Harbor NY, pp 492
Peterson PA (1978) Controlling elements: the induction of mutability at the A2 and C loci in maize. In: Walden DB (ed) Maize breeding and genetics. Wiley, New York, p 601
Peterson PA (1981) Instability among the components of a regulatory element transposon in maize. Cold Spring Harbor Symp Quant Biol 45:447–455
Reddy AR, Peterson PA (1976) Pattern differentiation of mutable c allelles; a second factor conditioning pattern. Maize Genet Coop Newsl 50:65–66
Rhoades MM (1941) The genetic control of mutability in maize. Cold Spring Harbor Symp Quant Biol 9:138–144
Rhoades MM, Dempsey E (1982) The induction of mutable systems in plants with the high-loss mechanism. Maize Genet Coop Newsl 56:21–26
Roeder GS, Farabaugh PJ, Chaleff DT, Fink GR (1980) The origins of gene instability in yeast. Science 209:1375–1380
Salamini F, Bremenhamp M, Marotta R (1982) Origin of the inactive regulatory element Bg-in of the maize 02m(r)-Bg system of controlling elements. Heredity 49:111–115
Scherer S, Davis RW (1980) Recombination of dispersed repeated DNA sequences in yeast. Science 209:1380–1384
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Communicated by W. Gehring
Journal paper No. J-10947 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 2381. Support from PCM-802 1575
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Reddy, A.R., Peterson, P.A. Transposable elements of maize. Molec Gen Genet 192, 21–31 (1983). https://doi.org/10.1007/BF00327642
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DOI: https://doi.org/10.1007/BF00327642