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ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #315963

Title: Recessive resistance to Cucurbit yellow stunting disorder virus in melon

item McCreight, James - Jim
item Wintermantel, William - Bill
item NATWICK, ERIC - University Of California - Cooperative Extension Service
item SINCLAIR, JONATHAN - Texas A&M University
item CROSBY, KEVIN - Texas A&M University
item LOPEZ-SESE, ANABEL - Consejo Superior De Investigaciones Cientificas (CSIC)
item GOMEZ-GUILLAMON, MARIA - Consejo Superior De Investigaciones Cientificas (CSIC)

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/28/2015
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Cucurbit yellow stunting disorder virus (CYSDV) reduces melon (Cucumis melo L.) fruit quality and yield in many parts of the world. CYSDV and its vector, sweetpotato whitefly (MEAM1 cryptic species of Bemisia tabaci; SPWF) are a devastating combination in the Sonoran Desert areas of California and Arizona in the USA, and Sonora and Baja California Norte, Mexico. Host plant resistance of melon to CYSDV and SPWF are high priorities for sustainable melon production in affected production areas. High-level resistance to CYSDV exhibited by TGR 1551 (PI 482420) appeared to be controlled by a dominant gene in controlled inoculation, greenhouse tests in Spain. Mean CYSDV symptom severity rating of F1 TGR 1551 x Dulce did not significantly differ from those of TGR 1551, but the F2 distribution suggested a recessive gene for resistance to CYSDV in controlled inoculation, greenhouse tests in Texas. TGR 1551 clearly expressed recessive genetic resistance in open field tests in Imperial Valley, California where the mean symptom severity ratings of ‘Impac’ and ‘Top Mark’ and the F1 progeny from crosses with TGR 1551 were not significantly different, and both differed from TGR 1551; the F2 and respective testcrosses confirmed recessive resistance to CYSDV. TGR 1551 subsequently expressed recessive resistance in subsequent greenhouse tests in Spain. PI 313970 expressed recessive resistance to CYSDV in a naturally infected test in California.