Genotype-environment relationships for repening time in blackberries and prospects for breeding an early ripening cultivar for Scotland |
| |
| Authors: | D L Jennings |
| |
| Institution: | (1) Scottish Horticultural Research Institute, Dundee, Scotland |
| |
| Abstract: | Summary When grown in Scotland, eight blackberry cultivars of diverse origin showed considerable variation in the dates when their first fruits ripened. These dates were determined in part by variation in the date of their first open flower and in part by variation in the number of days required from flowering to ripening. Genotype x environment interactions were important for both components, but especially for the second, where they could be attributed to heterogeneity of regressions against the environmental means. Temperature was considered the important environmental factor determining the number of days required from flowering to repening, and accumulated heat units successfully quantified the differences between cultivars for this component: cultivars required similar numbers of heat units in each season and there were no interaction effects. Heat units were not useful for study of flowering dates, however.The implications for breeding early ripening cultivars for Scotland are discussed. |
| |
| Keywords: | Blackberries genotype x environment interactions heat units earliness |
| 本文献已被 SpringerLink 等数据库收录！ |
|
