2026-04-14T08:09:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.12327/14922025-10-22T11:22:56Zcom_2072_4428com_2072_4427col_2072_487898

00925njm 22002777a 4500 dc Martínez-Martínez, Cecilia author Gonzalo, Maria José author Sipowicz, Pablo author Campos, Manuel author Martínez-Fernández, Irene author Leida, Carmen author Zouine, Mohammed author Alexiou, Konstantinos G. author Garcia-Mas, Jordi author Gómez, María Dolores author Tornero, Pablo author Pérez-Amador, Miguel Ángel author Esteras, Cristina author Picó, Belén author Romero, Carlos author Monforte, Antonio J. author 2021-11-25 Melon cultivars have a wide range of fruit morphologies. Quantitative trait loci (QTL) have been identifed underlying such diversity. This research focuses on the fruit shape QTL fsqs8.1, previously detected in a cross between the accession PI 124112 (CALC, producing elongated fruit) and the cultivar ‘Piel de Sapo’ (PS, producing oval fruit). The CALC fsqs8.1 allele induced round fruit shape, being responsible for the transgressive segregation for this trait observed in that population. In fact, the introgression line CALC8-1, carrying the fsqs8.1 locus from CALC into the PS genetic background, produced perfect round fruit. Following a map-based cloning approach, we found that the gene underlying fsqs8.1 is a member of the Ovate Family Proteins (OFP), CmOFP13, likely a homologue of AtOFP1 and SlOFP20 from Arabidopsis thaliana and tomato, respectively. The induction of the round shape was due to the higher expression of the CALC allele at the early ovary development stage. The fsqs8.1 locus showed an important structural variation, being CmOFP13 surrounded by two deletions in the CALC genome. The deletions are present at very low frequency in melon germplasm. Deletions and single nucleotide polymorphisms in the fsqs8.1 locus could not be not associated with variation in fruit shape among diferent melon accessions, what indicates that other genetic factors should be involved to induce the CALC fsqs8.1 allele efects. Therefore, fsqs8.1 is an example of a cryptic variation that alters gene expression, likely due to structural variation, resulting in phenotypic changes in melon fruit morphology. Martínez-Martínez, Cecilia, Maria José Gonzalo, Pablo Sipowicz, Manuel Campos, Irene Martínez-Fernández, Carmen Leida, and Mohammed Zouine et al. 2021. "A Cryptic Variation In A Member Of The Ovate Family Proteins Is Underlying The Melon Fruit Shape QTL Fsqs8.1". Theoretical And Applied Genetics. doi:10.1007/s00122-021-03998-6. 0040-5752 http://hdl.handle.net/20.500.12327/1492 https://doi.org/10.1007/s00122-021-03998-6 A cryptic variation in a member of the Ovate Family Proteins is underlying the melon fruit shape QTL fsqs8.1