In commercial plantations, mass propagation and deployment of identified and tested clones has potential economic benefits. However, the major challenge is the adventitious rooting ability of high yielding genotypes. In Eucalyptus, large-scale plantations of hybrid clones with enhanced productivity are well documented. However, the understanding of genetic architecture of adventitious rooting traits in this genus is limited. The present study was conducted to decipher the genetic control of this quantitative trait in a bi-parental pedigree of E. tereticornis × E. camaldulensis. The selected parental clones used for controlled hybridization were divergent for their adventitious rooting capacity from stem cuttings. The juvenile shoots of parents and hybrids were coppiced and two-node stem cuttings were harvested and treated with 4000 mg L⁻¹ Indole-3-butyric acid. Phenotypic variation in adventitious rooting traits was documented after 40 days of root induction in parents and 68 hybrids across two settings (March 2015 and April 2015). Significant difference in rooting percentage and number of roots was recorded between the settings. The study revealed a positive correlation between root length and rooting percentage. Broad sense heritability coefficient was the highest for rooting percentage and the predicted genetic advance was maximum for root volume (60.77%). Transgressive inheritance pattern was recorded for all rooting traits and several hybrids registered higher rooting percentage, enhanced root area and volume when compared to parents. These out-performing hybrid clones with superior root system will have potential resource use efficiency and can be deployed in arid and semi-arid zones to enhance productivity.

在商业人工林中，大量繁殖和部署已鉴定和测试的克隆具有潜在的经济利益。然而，主要的挑战是高产基因型的不定根生根能力。在桉树中，大量记载了具有提高生产力的杂交克隆的人工林。但是，该属对不定根特征的遗传结构的理解是有限的。本研究旨在破译这种数量性状在双亲谱系的E. tereticornis  ×  E. camaldulensis的遗传控制。所选择的用于受控杂交的亲本克隆由于其来自插条的不定根能力而不同。对亲本和杂种的幼芽进行交配，收获两节茎插条并用4000 mg L ^-1处理吲哚-3-丁酸。在两个背景下（2015年3月和2015年4月），亲本和68个杂种的根诱导40天后，记录了不定根特征的表型变异。设置之间记录了生根百分比和根数的显着差异。研究表明，根长与生根率之间呈正相关。广义遗传系数对生根率最高，而预测的遗传进展对根体积最大（60.77％）。记录了所有生根性状的侵略性遗传模式，与亲本相比，一些杂种的生根率更高，根系面积和体积增加。