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Genetics. Sep 1995; 141(1): 373–381.
PMCID: PMC1206734

New Rust Resistance Specificities Associated with Recombination in the Rp1 Complex in Maize

Abstract

We address the question of whether genetic reassortment events, including unequal crossing over and gene conversion, at the Rp1 complex are capable of generating novel resistance specificities that were not present in the parents. Some 176 events involving genetic reassortment within the Rp1 complex were screened for novel resistance specificities with a set of 11 different rust biotypes. Most (150/176) of the events were susceptible to all tested rust biotypes, providing no evidence for new specificities. Eleven events selected as double-resistant recombinants, when screened with the 11 test biotypes, showed the combined resistance of the two parental types consistent with a simple recombination and pyramiding of the parental resistances. Nine events selected either as having partial resistance or complete susceptibility to a single biotype possessed resistance to a subset of the biotypes that the parents were resistant to, suggesting segregation of resistance genes present in the parental Rp1 complex. Four events gave rise to novel specificities being resistant to at least one rust biotype to which both parents were susceptible. All four had flanking marker exchange, demonstrating that crossing over within the Rp1 complex is associated with the appearance of new rust resistance specificities.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Hong KS, Richter TE, Bennetzen JL, Hulbert SH. Complex duplications in maize lines. Mol Gen Genet. 1993 May;239(1-2):115–121. [PubMed]
  • Hulbert SH, Bennetzen JL. Recombination at the Rp1 locus of maize. Mol Gen Genet. 1991 May;226(3):377–382. [PubMed]
  • Salmeron JM, Barker SJ, Carland FM, Mehta AY, Staskawicz BJ. Tomato mutants altered in bacterial disease resistance provide evidence for a new locus controlling pathogen recognition. Plant Cell. 1994 Apr;6(4):511–520. [PMC free article] [PubMed]
  • Shepherd KW, Mayo GM. Genes conferring specific plant disease resistance. Science. 1972 Jan 28;175(4020):375–380. [PubMed]
  • Saxena KM, Hooker AL. On the structure of a gene for disease resistance in maize. Proc Natl Acad Sci U S A. 1968 Dec;61(4):1300–1305. [PMC free article] [PubMed]
  • Sudupak MA, Bennetzen JL, Hulbert SH. Unequal exchange and meiotic instability of disease-resistance genes in the Rp1 region of maize. Genetics. 1993 Jan;133(1):119–125. [PMC free article] [PubMed]
  • Thompson CB. Creation of immunoglobulin diversity by intrachromosomal gene conversion. Trends Genet. 1992 Dec;8(12):416–422. [PubMed]

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