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Identification of Cucumber mosaic resistance 2 (cmr2) That Confers Resistance to a New Cucumber mosaic virus Isolate P1 (CMV-P1) in Pepper (Capsicum spp.)
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Identification of Cucumber mosaic resistance 2 (cmr2) That Confers Resistance to a New Cucumber mosaic virus Isolate P1 (CMV-P1) in Pepper (Capsicum spp.)
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Identification of Cucumber mosaic resistance 2 (cmr2) That Confers Resistance to a New Cucumber mosaic virus Isolate P1 (CMV-P1) in Pepper (Capsicum spp.)
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Journal Article
Identification of Cucumber mosaic resistance 2 (cmr2) That Confers Resistance to a New Cucumber mosaic virus Isolate P1 (CMV-P1) in Pepper (Capsicum spp.)
2018
Overview
(CMV) is one of the most devastating phytopathogens of
. The single dominant resistance gene,
(
), that confers resistance to the CMV isolate P0 has been overcome by a new isolate (CMV-P1) after being deployed in pepper (
) breeding for over 20 years. A recently identified Indian
cultivar, \"Lam32,\" displays resistance to CMV-P1. In this study, we show that the resistance in \"Lam32\" is controlled by a single recessive gene,
(
). We found that
conferred resistance to CMV strains including CMV-Korean, CMV-Fny, and CMV-P1, indicating that
provides a broad-spectrum type of resistance. We utilized two molecular mapping approaches to determine the chromosomal location of
. Bulked segregant analysis (BSA) using amplified fragment-length polymorphism (AFLP) (BSA-AFLP) revealed one marker, cmvAFLP, located 16 cM from
. BSA using the Affymetrix pepper array (BSA-Affy) identified a single-nucleotide polymorphism (SNP) marker (Affy4) located 2.3 cM from
on chromosome 8. We further screened a pepper germplasm collection of 4,197 accessions for additional CMV-P1 resistance sources and found that some accessions contained equivalent levels of resistance to that of \"Lam32.\" Inheritance and allelism tests demonstrated that all the resistance sources examined contained
. Our result thus provide genetic and molecular evidence that
is a single recessive gene that confers to pepper an unprecedented resistance to the dangerous new isolate CMV-P1 that had overcome
.
Publisher
Frontiers Media SA,Frontiers Media S.A
