Early selection of Cabralea canjerana for propagation by mini-cutting

Abstract

The objective of this work was to define an early selection strategy to identify Cabralea canjerana (Meliaceae) clones with high multiplication rate. A mini-garden of 109 clones of canjerana seedlings was established in a completely randomized design, in an acclimatized greenhouse. From seedlings, the mini-stumps and mini-cuttings were obtained. Mini-cuttings were collected at five different times, and the number of mini-cuttings per mini-stump, rooting percentage, and number of rooted mini-cuttings were quantified. The number of rooted mini-cuttings per mini-stump was the only trait that showed high correlation with the others. Five groups of clones based on the number of rooted mini-cuttings per mini-stump were separated using k-means clustering, and the genetic gain from selection and Pearson correlation were estimated. The selection of the two best groups in each evaluation period resulted in high genetic gains from selection for all evaluated traits. Early selection for the number of rooted mini-cuttings discarded 65% of the evaluated clones, which increases experimental precision in evaluations of traits associated with plantlet growth and quality. Early selection for the number of rooted mini-cuttings per mini-stump at different times allows the identification of Cabralea canjerana clones with high multiplication rate.

Mini-cutting rooting and plantlet growth in Erythrina crista-galli L.

“…Variations among clones and the position on the trunk where epicormic shoots were collected were found in Ilex paraguariensis . The number of rooted mini-cuttings per ministump allowed an early selection of clones for the propagation of C. canjerana by mini-cutting (Burin et al, 2018). Variations among clones were observed for IBA application and serial mini-cutting technique in E. grandis (Wendling & Xavier, 2005).…”

“…The mini-clonal garden was established in August 2016, with plantlets originated from rooted mini-cuttings of the clones 15SM05 and 15SM08. The mini-clonal garden was established and managed according to the methodology used for other native species, such as Cabralea canjerana (Burin et al, 2018) and H. heptaphyllus (Rodrigues et al, 2017).…”

“…This is due to the fact that vegetative propagules are produced in clonal hedges established from seminal seedlings or rooted cuttings. Although these aspects are more notable for exotic species, scientific and technological development in vegetative propagation by mini-cutting of native species has been improved (Pimentel et al, 2016;Rodrigues et al, 2017;Burin et al, 2018).…”

Production of jacaranda plantlets by minicutting

“…The jacaranda mini-clonal hedge was established in October 2015, with a total of 48 seedlings that were 120 days old after sowing ( Figure 1A). The plantlets were planted in four polyethylene trays (55 cm x 34 cm x 15 cm) with spacing of 10 cm x 10 cm and the mini-clonal hedge was established according to the methodology used for other forest species in the MPVP-UFSM, such as Cabralea canjerana (Vellozo) Martius (Burin, Bisognin, Lencina, & Gimenes, 2018a;Burin, Bisognin, Lencina, Somavilla, & Pedroso, 2018b;Gimenes et al, 2015), Ilex paraguariensis A. St.-Hil. (Pimentel, Lencina, Pedroso, Somavilla, & Bisognin, 2017) and Handroanthus heptaphyllus Vell.…”

CONTROLLED RELEASE FERTILIZER IN THE ROOTING AND PERFORMANCE OF CLONES OF Paratecoma peroba

“…Among the methods of plant cloning is the minicuttings, a technique widely used to propagate clones of Eucalyptus species in Brazil, being characterized as one of the main factors, which contributed to the revolution of the country's clonal forestry on a commercial scale (Azevedo et al, 2015;Batista et al, 2014;Brondani et al, 2014;Fernandes et al, 2018;Rocha et al, 2015). Mini-cutting technique has been successfully used in the propagation of native forest species as an example, Cedrela fissilis (Xavier et al, 2003); Anadenanthera macrocarpa (Dias et al, 2015); Handroanthus heptaphyllus (Freitas et al, 2016); Tibouchina sellowiana (Fragoso et al, 2017); Peltophorum dubium (Mantovani et al, 2017); Cabralea canjerana (Burin et al, 2018). Despite the remarkable advances in clonal forestry obtained for the species of Brazilian flora, the formation of quality stock plants requires precise management, which depends on other factors such as the choice of container, substrate, dose and type of fertilizer, among others.…”