USA: Study evaluates pink rib disorder tolerance in lettuce germplasm in humid subtropical environments

Published 2024년 1월 4일

Tridge summary

Lettuce is primarily produced in the United States in California, Arizona, and Florida, worth $2.7 billion. Florida produces an estimated 3% of the total lettuce in the United States, with significant market demand due to its winter and spring harvest. A new study aimed at identifying genetic variations of pink rib severity among diverse lettuce accessions suggests potential for long-term mitigation of the disorder.

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Original content

Lettuce (Lactuca sativa) is primarily produced in the United States in California, Arizona, and Florida, with a production value of $2.7 billion (USDA-NASS 2021). Florida produces an estimated 3% of the total lettuce in the United States (USDA-NASS 2019), primarily in the Everglades Agricultural Area, which is a humid subtropical region in southern Florida. Despite this relatively low proportion of the industry in the United States, lettuce grown in Florida has significant market demand because it is harvested during winter and spring months.The expected shelf life of lettuce is 2 to 3 weeks when promptly cooled and held at 1 °C and 95% to 100% relative humidity. Shelf life is limited by several postharvest factors, including physiological disorders such as russet spotting, brown stain, and pink rib or pinking. Maintaining recommended field and postharvest conditions reduces its incidence but does not eliminate these disorders.During the past decade, research has identified ...

Source: Phys