Efficiency of rhizogenesis stimulators in propagating the loquat (Eriobotrya japonica Lindl.) cultivar «Yagona» from softwood cuttings under the conditions of Uzbekistan

Abstract

The loquat (Eriobotrya japonica Lindl.) is a promising crop in global subtropical fruit growing, yet it belongs to the category of hard-to-root species. The article systematically evaluates the effect of various rhizogenesis stimulants on the regenerative activity of softwood cuttings of the loquat. According to the research results, the highest rhizogenesis activity was observed in variant 2 — when treated with an aqueous solution of IBA (indole-3-butyric acid) at a concentration of 100 mg/L for 16 hours: the rooting rate reached 76.00±3.46%, callus formation took 26.00±2.08 days, the rooting period was 45.00±2.08 days, the number of roots per cutting was 5.60±0.42, and the root length was 7.20±0.44 cm. In the control variant (water, 24 hours), these indicators were 8.00±0.67%, 69 days, 1.8 roots, and 2.5 cm, respectively. A high level of statistical significance of differences between the variants was proven (Factual=80.12>Ftable=3.11; P<0.001; LSD0.05=7.56%).