Selection of Acacia mearnsii for mini-cutting propagation

Abstract

Acacia mearnsii De Wild. (Black wattle) is a forest species with great social and economical importance for the southern region of Brazil. This species has multifunctional characteristics, being cultivated to produce tannin, cellulose and energy. This research identified black wattle genotypes with competence for adventitious rooting for mini-cutting propagation. Single-bud mini-cuttings were treated with IBA at a concentration of 2000 mg L-1. After 30 days of cultivation in a humid chamber, the mini-cuttings were evaluated for percentages of survival, rooting, number of roots, average length of the three largest roots, and the number of mini-cuttings rooted per mini-stump. The identification of the best genotypes was performed with the Selegen REML/BLUP software. Selection between and within black wattle progenies can be performed based on the number of rooted mini-cuttings, making it possible to select genotypes with high competence for adventitious rooting while maintaining genetic variability for new selection cycles to develop clones for vegetative propagation by mini-cutting.

Rubber tree mini clonal garden: electric conductivity of the nutritional solution in the production of propagules

“…Later, the mini garden was utilized to produce miniature pine cuttings (Xiang et al, 2003). Currently, new species have shown promise for using this technique to efficiently control the environmental, phytosanitary, and nutritional conditions of parent plants (Oliveira et al, 2019;Packialakshmi and Sudhagar, 2019;Santos et al, 2020;Lowe et al, 2022;Gazzana et al, 2024).…”