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.
journal_name
Hereditasjournal_title
Hereditasauthors
Manoharan RK,Jung HJ,Hwang I,Jeong N,Kho KH,Chung MY,Nou ISdoi
10.1186/s41065-016-0023-zsubject
Has Abstractpub_date
2017-01-11 00:00:00pages
1eissn
0018-0661issn
1601-5223pii
23journal_volume
154pub_type
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