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Identification and Application of BhAPRR2 Controlling Peel Colour in Wax Gourd (Benincasa hispida)
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Identification and Application of BhAPRR2 Controlling Peel Colour in Wax Gourd (Benincasa hispida)
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Identification and Application of BhAPRR2 Controlling Peel Colour in Wax Gourd (Benincasa hispida)
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Journal Article
Identification and Application of BhAPRR2 Controlling Peel Colour in Wax Gourd (Benincasa hispida)
2021
Overview
Peel color is an important factor affecting commodity quality in vegetables; however, the genes controlling this trait remain unclear in wax gourd. Here, we used two F 2 genetic segregation populations to explore the inheritance patterns and to clone the genes associated with green and white skin in wax gourd. The F 2 and BC 1 trait segregation ratios were 3:1 and 1:1, respectively, and the trait was controlled by nuclear genes. Bulked segregant analysis of both F 2 plants revealed peaks on Chr5 exceeding the confidence interval. Additionally, 6,244 F 2 plants were used to compress the candidate interval into a region of 179 Kb; one candidate gene, Bch05G003950 ( BhAPRR2 ), encoding two-component response regulator-like protein Arabidopsis pseudo-response regulator2 (APRR2), which is involved in the regulation of peel color, was present in this interval. Two bases (GA) present in the coding sequence of BhAPRR2 in green-skinned wax gourd were absent from white-skinned wax gourd. The latter contained a frameshift mutation, a premature stop codon, and lacked 335 residues required for the protein functional region. The chlorophyll content and BhAPRR2 expression were significantly higher in green-skinned than in white-skinned wax gourd. Thus, BhAPRR2 may regulate the peel color of wax gourd. This study provides a theoretical foundation for further studies of the mechanism of gene regulation for the fruit peel color of wax gourd.
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