Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 3, 2000
Publication Date: October 20, 2000
Citation: Mccreight, J.D. 2000. Inheritance of resistance to lettuce infectious yellows virus in melon. HortScience. v.35(6):1118-1120 Interpretive Summary: Lettuce infectious yellows virus caused economic loss to melon and honeydew production in the desert southwest U.S. from 1981 through 1990. This paper describes the inheritance of resistance to this virus in a melon collected in India. It includes a simple procedure for correcting the data prior to analysis. this procedure helps to verify segregation of resistant and susceptible plants, but does not tell breeders which symtomless plants are genetically resistant and which are genetically susceptible. A procedure is described to unequivocally determine the genotype of each putative resistant plant.
Technical Abstract: Lettuce infectious yellows virus (LIYV), which is transmitted by the sweetpotato whitefly, seriously affected melon (cucumis melo L.) production in the lower desert areas of the southwest United States from about 1981 through 1990. Melon plant introduction (PI) 313970, previouly found to be asymptomatic in naturally infested field tests, was asymptomatic in controlled-inoculation greenhouse tests and was negative for the presence of virus inenzyme linked immunosorbent assays (ELISA). PI 313970 was crosed with susceptible 'Top Mark' and AR 5 to determint the inheritance of this resistance to LIYV. Data from F1, F2, F3 and backcross families indicate that resistance in this accession to be conditioned by a single, dominant gene designated Lettuce infectious yellows and symbolized Liyv.