Comparative analysis of flowering and fruiting characteristics between five blackberry (Rubus L.) hybrid strains and their parents
For breeding new blackberry (Rubus L.) cultivars, a field cultivation experiment of five primary selected blackberry hybrid strains (5-8-2, 6-6-3, 7-7-4, 7-10-2 and 7-10-6) with their parent cultivars as control was carried out in Nanjing, China. Two-year-old plants were investigated for their fruiting traits, the results were shown as follows. The 5-8-2 fruits began to mature in early June and the ripening period was about 23 days, which expressed earlier maturity. 6-6-3, 7-10-2 and 7-10-6 began to mature in the middle of June lasting about 20 days, which expressed medium maturity. 7-7-4 began to mature in early July, which expressed late maturity. There were significant differences in fruit size among the five hybrid strains, of which 6-6-3 had the largest fruit weight above 7 g fruit‑1. 5-8-2, 7-10-2 and 7-10-6 had medium fruit weight with average value of around 5.5 g fruit‑1, and the fruit weight of 7-7-4 is the smallest with average value below 5 g fruit‑1. The yield of 5 hybrid strains was also different significantly. 5-8-2 had the highest yield, which was 3.37 kg plant‑1, followed by 6-6-3 and 7-7-4, which was 3.18 and 2.84 kg plant‑1, respectively. 7-10-2 and 7-10-6 had lower yield. Comparing with their parents, the comprehensive assessment suggested that 5-8-2 showed earlier maturity and high yield and 6-6-3 showed large fruit size and high yield, furthermore both kept the excellent flowering and fruiting characteristics of their parents, which are potential for further study as candidate cultivars.
Huang, Z.J., Wei, Y.L., Wu, W.L. and Li, W.L. (2020). Comparative analysis of flowering and fruiting characteristics between five blackberry (Rubus L.) hybrid strains and their parents. Acta Hortic. 1277, 345-352
blackberry (Rubus L.), hybrid strain, flowering characteristics, fruiting characteristics