Pérez-Luna Alberto, Wehenkel Christian, Prieto-Ruíz José Ángel, López-Upton Javier, Hernández-Díaz José Ciro
Programa Institucional de Doctorado en Ciencias Agropecuarias y Forestales, Universidad Juárez del Estado de Durango, Durango, México.
Instituto de Silvicultura e Industria de la Madera, Universidad Juárez del Estado de Durango, Durango, México.
PeerJ. 2020 Feb 7;8:e8468. doi: 10.7717/peerj.8468. eCollection 2020.
Grafting is one of the most widely used methods for vegetative propagation, particularly for multiplying trees considered important, but there has been little research done on the effect of hybridization on grafts from the genus . Sometimes hybrids show the ability to reproduce and adapt efficiently to the environment. However, they reduce the genetic gain of seed orchards. The objective in this research was to evaluate the effect of scion grafts from pure species donor Carr. and from putative hybrid trees × . Engelm., grafted on rootstocks of pure species , along with the effect of the position of the scion in the donor tree crown (upper third and middle third). The scions were collected from three trees of the pure species and three hybrids. In each tree, 20 scions were collected from each third of the crown evaluated. 120 side-veneer grafts were made at the beginning of spring (March) 2018. Variance analyses were performed to evaluate the treatments and adjustments of the Logit and Weibull models to obtain the probability of graft survival. Significant differences were found between the origins of scions ( < 0.0083, after Bonferroni correction), showing grafts with hybrid tree scions taking hold better. In addition, the probability of survival at 5 months after grafting with hybrid tree scions was greater ( < 0.0001) than in grafts with scions from trees of the pure species (Logit model), which coincides with the results of the Weibull model, which indicated that the probability of graft death with pure species donor tree scions is greater than for grafts with hybrid scions. There were no significant differences regarding the position of the scion in the donor tree crown.
嫁接是营养繁殖中应用最广泛的方法之一，尤其用于繁殖被认为重要的树木，但关于杂交对该属嫁接的影响研究甚少。有时杂种表现出高效繁殖和适应环境的能力。然而，它们会降低种子园的遗传增益。本研究的目的是评估来自纯种供体卡尔的接穗以及来自推定杂种树木×恩格尔姆的接穗，嫁接到纯种砧木上的效果，以及接穗在供体树冠中的位置（上三分之一和中三分之一）的影响。接穗取自三棵纯种树木和三棵杂种树木。在每棵树中，从评估的树冠的每个三分之一处采集20个接穗。2018年春季（3月）初制作了120个侧接皮接。进行方差分析以评估处理，并对Logit和威布尔模型进行调整以获得嫁接存活的概率。发现接穗来源之间存在显著差异（经邦费罗尼校正后P<0.0083），表明带有杂种树木接穗的嫁接成活率更高。此外，用杂种树木接穗嫁接后5个月的存活概率（P<0.0001）高于用纯种树木接穗的嫁接（Logit模型），这与威布尔模型的结果一致，该模型表明纯种供体树木接穗的嫁接死亡概率高于杂种接穗。接穗在供体树冠中的位置没有显著差异。
