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Resistant Sources and Genetic Control of Resistance to ToLCNDV in Cucumber. | LitMetric

Resistant Sources and Genetic Control of Resistance to ToLCNDV in Cucumber.

Microorganisms

Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Avenida de los Naranjos s/n, 46022 Valencia, Spain.

Published: April 2021

AI Article Synopsis

Article Abstract

Tomato leaf curl New Delhi virus (ToLCNDV) is a severe threat for cucurbit production worldwide. Resistance has been reported in several crops, but at present, there are no described accessions with resistance to ToLCNDV in cucumber (). var. accessions were mechanically inoculated with ToLCNDV and screened for resistance, by scoring symptom severity, tissue printing, and PCR (conventional and quantitative). Severe symptoms and high load of viral DNA were found in plants of a nuclear collection of Spanish landraces and in accessions of from different geographical origins. Three Indian accessions (CGN23089, CGN23423, and CGN23633) were highly resistant to the mechanical inoculation, as well as all plants of their progenies obtained by selfing. To study the inheritance of the resistance to ToLCNDV, plants of the CGN23089 accession were crossed with the susceptible accession BGV011742, and F hybrids were used to construct segregating populations (F and backcrosses), which were mechanically inoculated and evaluated for symptom development and viral load by qPCR. The analysis of the genetic control fit with a recessive monogenic inheritance model, and after genotyping with SNPs distributed along the genome, a QTL associated with ToLCNDV resistance was identified in chromosome 2 of cucumber.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8146778PMC
http://dx.doi.org/10.3390/microorganisms9050913DOI Listing

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