Orange flesh trait in potato: inheritance and carotenoid content
1993
Brown, C.R. | Edwards, C.G. | Yang, C.P. | Dean, B.B.
Potatoes with orange flesh were found in cultivated diploid (2n = 24) potato populations derived from Solanum stenotomum Juz. et Buk. and S. phureja Juz. et Buk. The orange flesh trait was found to be controlled by an allele at the locus designated Or. Oris dominant over Y and y, which control yellow and white flesh, respectively. In a comparison of white and orange flesh segregants from crosses, the orange was associated with large amounts of zeaxanthin, a xanthophyll previously not reported as a constituent of potato flesh carotenoids. The combined total of lutein and zeaxanthin was four times higher than the highest carotenoid composition previously reported for potato, this is about one-sixth the total carotenoid content of carro with standard carotenoid levels, although lutein and zeaxanthin do not possess provitamin A activity.
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