Advances of marker-assisted selection in peanut breeding
Peanut is widely grown in more than 100 countries in the world and can be processed for oil,peanut butter,confectionary,or direct consumption(fresh,baked or roasted).It is an important source of edible vegetable oil and protein.High yield,high quality,pest and disease resistance are the main objectives of peanut breeding.The majority of released peanut varieties were developed by conventional breeding methods with high cost,lengthy selec-tion processes and low efficiency.Marker-assisted selection can greatly improve the precision and breeding efficien-cy.High-density genotypic data is prerequisite for QTL mapping and identification of molecular markers for yield,quality and disease resistance traits in peanut.The release of the whole genomic sequences of three peanut cultivars in 2019,including two elite Chinese founder varieties Shitouqi and Fuhuasheng,and a popular U.S.peanut variety Tifrunner,greatly promoted the identification and application of molecular markers for peanut breeding.In recent years,molecular markers for oleic acid content,oil content,root-knot nematode resistance,rust resistance,leaf spots resistance,and yield-related traits have been developed.Peanut varieties or breeding lines combining high oleic acid with high oil content,high oleic acid with resistance to diseases such as rust,bacterial wilt,or root-knot nematode were successfully developed through marker-assisted selection.Utilization of wild relatives in peanut germplasm,development of high-throughput genotyping and phenotyping platforms,and application of genomic se-lection would be of high priority in peanut breeding in the future.
peanut(Arachis hypogaea L.)breedingmarker-assisted selectionyield traitsquality traitspest and disease resistances
万方数据
维普
