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A single nucleotide polymorphism in EXECUTER 1 is a strong candidate locus for the leaf color variation in sponge gourd
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DOI：10.1016/j.scienta.2026.114960.png)
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Abstract
En 中文
• Leaf color in sponge gourd is closely associated with photosynthetic efficiency, representing an important agronomic trait. An F₂ population was constructed from parental lines with contrasting leaf color phenotypes to dissect its genetic basis, and the research materials and trait selection exhibit important agronomic application value. • Using bulked segregant analysis (BSA), a candidate region of approximately 4.89 Mb was precisely located on chromosome 8. • By combining resequencing and fine mapping, a non-synonymous SNP variation located on the exon of the EXECUTER 1 (EX1) was identified as the key variation. Gene function was further validated using homologous mutants in Arabidopsis thaliana, verifying its roles in regulating leaf coloration and photosynthetic efficiency. • Based on this SNP, the developed functional molecular marker can achieve co-segregation of phenotype and genotype in the F2 generation population. This marker is also used for molecular marker-assisted breeding of the high photosynthetic efficiency trait in sponge gourds.
Keywords:
Sponge gourd
EXECUTER 1
Leaf color variation
Chlorophyll content
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