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Carotenoid composition of the fruits in hybrids between lycopersicon esculentum cultivar immune 1532 and some wild growing species of the genus lycopersicon 1. lycopersicon esculentum x lycopersicon chmielewskii f 1 and lycopersicon esculentum x lycopersicon parviflorum f 1



Carotenoid composition of the fruits in hybrids between lycopersicon esculentum cultivar immune 1532 and some wild growing species of the genus lycopersicon 1. lycopersicon esculentum x lycopersicon chmielewskii f 1 and lycopersicon esculentum x lycopersicon parviflorum f 1



Genetika i Selektsiya 15(2): 101-108



Carotenoid composition and content was studied in ripe fruits of F1 crosses between the cultivated tomato cv. Immune 1532 and the wild species L. chmielewskii 1317 and L. parviflorum LA 1326. The carotenoids were fractionated by aluminum oxide column chromatography. Hybrids inherit the carotenoids found in their parents.sbd.phytofluene, .beta.-carotene and lycopene; they contain 4 more carotenes.sbd.delta.,.xi.,X-453 and X-428, the last two being not identified. A genetic factor is present in both wild-growing parents, similar or identical to the Del gene discovered by Tomes (1963). It controls the production of .delta.-carotene in the fruits of the hybrids. The activity of this gene in the hybrids is low; in the wild species, it is not expressed at all. Certain differences exist between the 2 hybrids only in respect to carotenoid content, i.e., the differences are of a regulatory type. The wild species introduce in the hybrids the dominant factors conditioning strong inhibition of carotenoid biosynthesis, particularly in its first stages. The activity of these factors is higher in crosses with L. chielewskii than in crosses with L. parviflorum.

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