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Volume 90, Issue 11

Allele mining in the pepper gene pool provided new complementation effects between and alleles for resistance to pepper veinal mottle virus Free

Abstract

Molecular cloning of recessive resistance genes to potyviruses in a large range of host species identified the eukaryotic translation initiation factor 4E (eIF4E) as an essential determinant in the outcome of potyvirus infection. Resistance results from a few amino acid changes in the eIF4E protein encoded by the recessive resistance allele that disrupt the direct interaction with the potyviral protein VPg. In plants, several loci encode two protein subfamilies, eIF4E and eIF(iso)4E. While most eIF4E-mediated resistance to potyviruses depends on mutations in a single eIF4E protein, simultaneous mutations in eIF4E (corresponding to the locus) and eIF(iso)4E (corresponding to the locus) are required to prevent pepper veinal mottle virus (PVMV) infection in pepper. We used this model to look for additional alleles at the locus that result in resistance when combined with the resistant allele. Among the 12 resistance alleles sequenced in the pepper gene pool, three were shown to have a complementary effect with for resistance. Two amino acid changes were exclusively shared by these three alleles and were systematically associated with a second amino acid change, suggesting that these substitutions are associated with resistance expression. The availability of new resistant allele combinations increases the possibility for the durable deployment of resistance against this pepper virus which is prevalent in Africa.

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2009-11-01
2024-04-20
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Allele mining in the pepper gene pool provided new complementation effects between pvr2-eIF4E and pvr6-eIF(iso)4E alleles for resistance to pepper veinal mottle virus
J. Gen. Virol. 90, 2808 (2009); https://doi.org/10.1099/vir.0.013151-0
/content/journal/jgv/10.1099/vir.0.013151-0
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