Genome-wide QTL analysis of tomato fruit cuticle deposition and composition  

作　　者：Rida Barraj Barraj Patricia Segado Rocio Moreno-Gonzalez Antonio Heredia Rafael Fernandez-Munoz Eva Dominguez 

机构地区：[1]Instituto de Hortofruticultura Subtropical y Mediterranea La Mayora,Universidad de Malaga-Consejo Superior de Investigaciones Cientificas,Departamento de Mejora Genetica y Biotecnologia,Estacion Experimental La Mayora,Algarrobo-Costa,E-29750 Malaga,Spain [2]Instituto de Hortofruticultura Subtropical y Mediterranea La Mayora,Universidad de Malaga0Consejo Superior de Investigaciones Cientificas,Departamento de Biologia Molecular y Bioquimica,Universidad de Malaga,E-29071 Malaga,Spain [3]Departament de Bioquimica i Fisiologia and Institut de Recerca en Nutricioi Seguretat Alimentaria(INSA-UB),Universitat de Barcelona(UB),E-08028 Barcelona,Spain

出　　处：《Horticulture Research》2021年第1期1443-1457,共15页园艺研究（英文）

基　　金：supported by grant RTI2018-094277-B/AEI/10.13039/501100011033 from Agencia Estatal de Investigacion,Ministerio de Ciencia e Innovacion,Spain co-financed by the European Regional Development Fund(ERDF).

摘　　要：Genetics of traits related to fruit cuticle deposition and composition was studied in two red-fruited tomato species.Two mapping populations derived from the cross between the cultivated tomato(Solanum lycopersicum L.)and its closest relative wild species Solanum pimpinellifolium L.were employed to conduct a QTL analysis.A combination of fruit cuticle deposition,components and anatomical traits were investigated and the individual effect of each QTL evaluated.A total of 70 QTLs were identified,indicating that all the cuticle traits analyzed have a complex polygenic nature.A combination of additive and epistatic interactions was observed for all the traits,with positive contribution of both parental lines to most of them.Colocalization of QTLs for various traits uncovered novel genomic regions producing extensive changes in the cuticle.Cuticle density emerges as an important trait since it can modulate cuticle thickness and invagination thus providing a strategy for sustaining mechanical strength without compromising palatability.Two genomic regions,located in chromosomes 1 and 12,are responsible for the negative interaction between cuticle waxes and phenolics identified in tomato fruit.Several candidate genes,including transcription factors and structural genes,are postulated and their expression analyzed throughout development.

关 键 词：CULTIVATED TRAITS ADDITIVE 

分 类 号：S641.2[农业科学—蔬菜学]