Variation in Fruit Characteristics of 3x Progenies Obtained from a Cross between 4x and 2x Grape Cultivars

摘要

This study investigated the variation in fruit characteristics between different triploid progenies derived from a cross between tetraploid and diploid grape cultivars, with the aim of developing high quality, labor-saving triploid grapes. No differences were found in fruit quality traits such as soluble solids content and titratable acidity, whereas significant variation was noted in cluster weight induced by a one-time application of GA3 (100 ppm) on the triploid progeny of different cross combinations. The cluster weight was higher in progeny obtained from 'Kyoho' x 'Sekirei' than for offspring derived from other cross combinations; deviation in the mean cluster weight was also small for 'Kyoho' x 'Sekirei' progeny. These results suggest that specific cross combinations, such as 'Kyoho' x 'Sekirei', can be used to efficiently breed new, labor-saving seedless grape cultivars.