ISHS Acta Horticulturae 254: II International Peach Symposium
DATE OF RIPENING AND TWO MORPHOLOGICAL FRUIT TRAITS IN PEACH PROGENIES |
| Authors: | D. Bassi, M. Gambardella, P. Negri |
| Abstract:
Six progenies from controlled crosses of early, medium and late ripening cultivars were evaluated to study ripening date heritability. Uni-, bi- and tri-modal distribution frequency patterns of the progeny were observed for date of ripening. Crosses between a medium and several early-ripening cultivars tended toward lateness. The offspring from an early parent tended toward earliness when crossed with a medium ripening and toward lateness when crossed with a late ripening. Therefore each parent seems to play an important role, and a self-pollination program needs to be developed to evaluate this potential. In all likelihood, a few major genes appear to be involved in ripening date heritability. Four progenies were investigated for fruit shape. A high range of variability was found by crossing cultivars of round and elongated fruit with a slight bias toward round fruit. The stone/flesh ratio also was investigated in two progenies. Typical quantitative patterns in frequency distribution of the seedlings were found. The low ratio shown by a high percentage of seedlings in one progeny, and in the other the increase in the fruit weight to stone weight ratio make it possible to select for favorable genotypes. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
