Alireza Effati; Mehdi Hadadinejad
Abstract
The present experiment was performed to optimization of thorny and thornless blackberry propagation via factorial in a CRD, the first factor included four cultivars (everthornless, thornless evergreen, early and mid-ripen thorny) from blackberry collection, the second factor root cutting's diameter (2-3 ...
Read More
The present experiment was performed to optimization of thorny and thornless blackberry propagation via factorial in a CRD, the first factor included four cultivars (everthornless, thornless evergreen, early and mid-ripen thorny) from blackberry collection, the second factor root cutting's diameter (2-3 and 3-5 mm) and the third factor involves the root cuttings length (6, 8, 10 and 12 cm), with seven replications in March 2016. After three months rooting performed under shade and humid condition then the rooting and its related traits measured. Results of rooting in thorny and thornless cultivars showed root cuttings with 2-3 mm diameter and 12 cm length produced the longest root in the proximal end of the mid-ripen thorny cultivars with 123.43 mm. In chimera and mid-ripen thornless cultivars the most rooting percent observed in the 12 cm length in all of the diameters with an average of 71.42%. Thornless cultivars significantly, showed better survival percent (77.33), inside of shorter roots length (51.8cm) and shoot (46.07cm), in compare to thorny cultivars. The highest percentage of survival (77.33%) observed in normal thornless, among thornless cultivars, and early thorny (64.58 %) in thorny cultivars. The results showed that root cutting with 3-5 mm diameter and 10-12 cm length had significantly effect on increase of blackberry root cutting rooting. The genetic difference between cultivars and amount of reserved material in cuttings must be considered in the propagation of blackberries by root cutting.