High-resolution genetic dissection of the major QTL for tipburn resistance in lettuce, Lactuca sativa.

Tipburn is an important physiological disorder of lettuce, Lactuca sativa L., related to calcium deficiency that can result in leaf necrosis and unmarketable crops. The major quantitative trait locus (QTL), qTPB5.

The Ionomics of Lettuce Infected by pv. .

Bacterial leaf spot (BLS) caused by pv. () places a major constraint on lettuce production worldwide. The most sustainable strategy known to date for controlling BLS is the use of resistant cultivars.

Partial aphid resistance in lettuce negatively affects parasitoids.

This study investigated the effects of partial plant resistance on the lettuce aphid Nasonovia ribisnigri (Mosley) (Hemiptera: Aphididae), a major pest of cultivated lettuce (Lactuca sativa L.), and one of its parasitoids, Aphidius ervi Haliday (Hymenoptera: Braconidae). Aphids were reared on susceptible (L.

Quantitative trait loci associated with tipburn, heat stress-induced physiological disorders, and maturity traits in crisphead lettuce.

Crisphead lettuce (Lactuca sativa L.) crops exhibit several economically important, physiological disorders when grown in high temperature conditions. These include tipburn, rib discoloration, premature bolting, ribbiness, and internal rib cracking.