The use of interspecific Psidium hybrids as rootstock resistant to the nematode Meloidogyne enterolobii is a strategy that offers more security for the establishment of new guava orchards. However, indicating new rootstocks for commercial guava crops requires assessing their graft compatibility. The aim of this study was to assess graft compatibility between ‘Paluma’ guava and new hybrids produced by crossing P. guineense and P. cattleianum, based on biometric indicators, photosynthetic traits and crown response to formative pruning. The treatments consisted of ‘Paluma’ nongrafted plants (control) or grafted onto new hybrids coded as H237, H242 and H251. Stem height and diameter were assessed until 840 days after grafting, and photosynthetic traits in spring and fall, after two formative prunings. Regrowth potential was quantified after each pruning. Photosynthetic capacity, stem biometry and regrowth ability after pruning indicate preliminary graft compatibility between ‘Paluma’ guava and rootstock from P. guineense x P. cattleianum crosses.

中文翻译：

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'Paluma' 番石榴和新的 Psidium 杂交种之间的嫁接相容性指标


使用种间 Psidium 杂交种作为对线虫 Meloidogyne enterolobii 具有抗性的砧木是一种为建立新的番石榴果园提供更多安全性的策略。然而，指出商业番石榴作物的新砧木需要评估它们的嫁接兼容性。本研究的目的是根据生物识别指标、光合性状和树冠对形成性修剪的反应，评估 'Paluma' 番石榴与几内亚假单和猫假单杂交产生的新杂交种之间的嫁接相容性。处理包括“Paluma”非嫁接植物（对照）或嫁接到编码为 H237、H242 和 H251 的新杂交种上。嫁接后 840 天评估茎高和直径，在春季和秋季评估光合性状，经过两次形成性修剪。每次修剪后量化再生潜力。修剪后的光合能力、茎生物测量和再生能力表明 'Paluma' 番石榴与几内亚 P. guineense x P. cattleianum 杂交砧木之间的初步嫁接兼容性。