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The Sepal Curvature Regulator Gene Encodes a MADS-Box Protein Regulating Sepal Shape in Tomato
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DOI：10.1021/acs.jafc.6c03278.png)
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Abstract
En 中文
Tomato (Solanum lycopersicum) sepal morphology impacts fruit external quality, yet its genetic regulatory mechanism remains unclear. Accordingly, we constructed a segregating population from noncurling (P47) and inward-curling Ailsa Craig (AC) inbred lines, and fine-mapped the major sepal curvature locus to a 25-kb distal region of chromosome 4 via BSA-seq and genetic mapping. Four candidate genes were found in this interval, with only Solyc04g064860 harboring a parental-specific Ser9Ala nonsynonymous SNP cosegregating with the trait in cultivated germplasm. This Type I MADS-box transcription factor gene was designated SCR (sepal curvature regulator). SCR expression was significantly lower in AC than in P47. SCR knockout induced inward curling in noncurling sepals of 5P and aggravated inherent sepal curvature in AC, alongside reduced auxin, gibberellin, and cytokinin. These findings establish SCR as a critical regulator of tomato sepal curvature, delivering theoretical underpinnings for sepal development and genetic resources for trait-targeted tomato breeding.
Keywords:
Catalytic reactions
Genetics
Genomics
Plant derived food
Plants
tomato
mapping
MADS-box
appearance quality
sepal shape
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6.2
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4.5W
Citations:
15.3W
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