Genetic dissection of climacteric fruit ripening in a melon population segregating for ripening behavior

文献类型： 外文期刊

第一作者： Pereira, Lara

作者： Pereira, Lara;Santo Domingo, Miguel;Ruggieri, Valentino;Argyris, Jason;Pujol, Marta;Garcia-Mas, Jordi;Ruggieri, Valentino;Argyris, Jason;Pujol, Marta;Garcia-Mas, Jordi;Phillips, Michael A.;Zhao, Guangwei;Xu, Yongyang;He, Yuhua;Lian, Qun;Huang, Sanwen

作者机构：

期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）

ISSN： 2662-6810

年卷期： 2020 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Melon is as an alternative model to understand fruit ripening due to the coexistence of climacteric and non-climacteric varieties within the same species, allowing the study of the processes that regulate this complex trait with genetic approaches. We phenotyped a population of recombinant inbred lines (RILs), obtained by crossing a climacteric (Vedrantais, cantalupensis type) and a non-climcteric variety (Piel de Sapo T111, inodorus type), for traits related to climacteric maturation and ethylene production. Individuals in the RIL population exhibited various combinations of phenotypes that differed in the amount of ethylene produced, the early onset of ethylene production, and other phenotypes associated with ripening. We characterized a major QTL on chromosome 8, ETHQV8.1, which is sufficient to activate climacteric ripening, and other minor QTLs that may modulate the climacteric response. The ETHQV8.1 allele was validated by using two reciprocal introgression line populations generated by crossing Vedrantais and Piel de Sapo and analyzing the ETHQV8.1 region in each of the genetic backgrounds. A Genome-wide association study (GWAS) using 211 accessions of the ssp. melo further identified two regions on chromosome 8 associated with the production of aromas, one of these regions overlapping with the 154.1kb interval containing ETHQV8.1. The ETHQV8.1 region contains several candidate genes that may be related to fruit ripening. This work sheds light into the regulation mechanisms of a complex trait such as fruit ripening.

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