Abstract: A novel romaine lettuce cultivar, designated HMX 7555, is disclosed. The invention relates to the seeds of lettuce cultivar HMX 7555, to the plants of lettuce line HMX 7555 and to methods for producing a lettuce plant by crossing the cultivar HMX 7555 with itself or another lettuce line. The invention further relates to methods for producing a lettuce plant containing in its genetic material one or more transgenes and to the transgenic plants produced by that method and to methods for producing other lettuce lines derived from the cultivar HMX 7555.

Abstract: A novel romaine lettuce cultivar, designated HMX 7555, is disclosed. The invention relates to the seeds of lettuce cultivar HMX 7555, to the plants of lettuce line HMX 7555 and to methods for producing a lettuce plant by crossing the cultivar HMX 7555 with itself or another lettuce line. The invention further relates to methods for producing a lettuce plant containing in its genetic material one or more transgenes and to the transgenic plants produced by that method and to methods for producing other lettuce lines derived from the cultivar HMX 7555.

Abstract: This invention provides for multiple pathogen resistant varieties of lettuce, Lactuca sativa. The varieties of this invention have a combined resistance to lettuce mosaic virus isolate Common, resistance to downy mildew pathotype I, resistance to corky root bacteria isolate CA1, Sclerotinia minor and resistance to big vein disease via infection through Olpidium brassicae. The varieties having a non-albino phenotype, a average mature head of 15 cm diameter and are male fertile. The varieties are developed through selective breeding.