In sweet cherry(Prunus avium L.),large variability exists for various traits related to fruit quality.There is a need to discover the genetic architecture of these traits in order to enhance the efficiency of breeding...In sweet cherry(Prunus avium L.),large variability exists for various traits related to fruit quality.There is a need to discover the genetic architecture of these traits in order to enhance the efficiency of breeding strategies for consumer and producer demands.With this objective,a germplasm collection consisting of 116 sweet cherry accessions was evaluated for 23 agronomic fruit quality traits over 2-6 years,and characterized using a genotyping-by-sequencing approach.The SNP coverage collected was used to conduct a genome-wide association study using two multilocus models and three reference genomes.We identified numerous SNP-trait associations for global fruit size(weight,width,and thickness),fruit cracking,fruit firmness,and stone size,and we pinpointed several candidate genes involved in phytohormone,calcium,and cell wall metabolisms.Finally,we conducted a precise literature review focusing on the genetic architecture of fruit quality traits in sweet cherry to compare our results with potential colocalizations of marker-trait associations.This study brings new knowledge of the genetic control of important agronomic traits related to fruit quality,and to the development of marker-assisted selection strategies targeted towards the facilitation of breeding efforts.展开更多
基金We thank the Prunus/Juglans Biological Resources Center managed by the INRAE Fruit Tree Experimental Unit for performing part of the phenotyping and for maintenance of the collection.This work was supported by the Région Nouvelle-Aquitaine with the project CerGEn reference 2018-1R20203,which funded the postdoctoral fellowship for A.S.L.D.
文摘In sweet cherry(Prunus avium L.),large variability exists for various traits related to fruit quality.There is a need to discover the genetic architecture of these traits in order to enhance the efficiency of breeding strategies for consumer and producer demands.With this objective,a germplasm collection consisting of 116 sweet cherry accessions was evaluated for 23 agronomic fruit quality traits over 2-6 years,and characterized using a genotyping-by-sequencing approach.The SNP coverage collected was used to conduct a genome-wide association study using two multilocus models and three reference genomes.We identified numerous SNP-trait associations for global fruit size(weight,width,and thickness),fruit cracking,fruit firmness,and stone size,and we pinpointed several candidate genes involved in phytohormone,calcium,and cell wall metabolisms.Finally,we conducted a precise literature review focusing on the genetic architecture of fruit quality traits in sweet cherry to compare our results with potential colocalizations of marker-trait associations.This study brings new knowledge of the genetic control of important agronomic traits related to fruit quality,and to the development of marker-assisted selection strategies targeted towards the facilitation of breeding efforts.
