Gene Details

Gene Locus Name Chromosome Arm Marker type
Nr Never ripe 9 L Morph
Allele Allele Name Synonyms Source Notes Phenotype Category/Primary
-- SPON Rick & Butler 1956 Adv Genet 8:367. In cv. Pearson. Lanahan et al 1994 Pl Cell 6:521 Nr = ethylene receptor, ETR1. Fruits turn color at normal time, but develops pigmentation slowly and never assume as deep a color as normal, either from exterior or interior, no matter how long fruits are retained on the plant or in storage. Dominant expression. Also displays abnormal seedling growth, including root hypertrophy. Flowers do not abscise in the absence of fruit set, and petals persist after fruit set.
Fruit color, flavor, or ripening modification Yes
Flower form or color No
Root modification No
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