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- Title
Molecular breeding of a novel orangebrown tomato fruit with enhanced beta-carotene and chlorophyll accumulation.
- Authors
Manoharan, Ranjith Kumar; Hee-Jeong Jung; Indeok Hwang; Namhee Jeong; Kang Hee Kho; Mi-Young Chung; Ill-Sup Nou
- Abstract
Background: Tomatoes provide a significant dietary source of the carotenoids, lycopene and β-carotene. During ripening, carotenoid accumulation determines the fruit colors while chlorophyll degradation. These traits have been, and continue to be, a significant focus for plant breeding efforts. Previous work has found strong evidence for a relationship between CYC-B gene expression and the orange color of fleshy fruit. Other work has identified a point mutation in SGR that impedes chlorophyll degradation and causes brown flesh color to be retained in some tomato varieties. Methods: We crossed two inbred lines, KNY2 (orange) and KNB1 (brown) and evaluated the relationship between these genes for their effect on fruit color. Phenotypes of F2 generation plants were analyzed and a novel 'orange-brown' fruit color was identified. Results: We confirm two SNPs, one in CYC-B and another in SGR gene sequence, associated with segregation of 'orange-brown' fruit color in F2 generation. The carotenoid and chlorophyll content of a fleshy fruit was assessed across the different phenotypes and showed a strong correlation with expression pattern of carotenoid biosynthesis genes and SGR function. The orange-brown fruit has high β-carotene and chlorophyll. Our results provide valuable information for breeders to develop tomato fruit of a novel color using molecular markers.
- Subjects
TOMATO breeding; TOMATO genetics; CHLOROPHYLL; GENE expression in plants; POINT mutation (Biology); PLANTS
- Publication
Hereditas, 2017, Vol 154, p1
- ISSN
0018-0661
- Publication type
Article
- DOI
10.1186/s41065-016-0023-z