Analysis of the texture properties in grapes berries based on puncture test and berries shape

The connection between grape texture and commodity index was analyzed after grapes were measured about weight,size,and puncture properties.Ten different cultivars including Red Globe,Mellssa,Ruby,kyoho,White Rosario,Italy,Muscat,Horse milk,Manicure Finger and Ze Xiang grapes were chosen for test materials.According to simulating Chewing food process,we edited force-displacement analysis progress and established 10 parameters to characterize the textural properties of berries.We analyzed the correlation between each texture parameters,between puncture parameters and commodity indexes of berries.The results showed that there are significant correlations between berry deformation and skin stiffness,drop displacement,drop brittleness,flesh puncture work,skin rupture work,homogeneous index respectively. There are significant correlations between weight of berry and skin hardness,skin stiffness,drop hardness,flesh firmness,between equatorial diameter and drop brittleness,between longitudinal diameter and skin stiffness. The high correlation showed that consumers can choose palatable grapes according to commodity index.Some commodity index can predict the property of storage and transport.Some parameters can represent texture feature of grapes berry.