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Open AccessArticle

A Phenotypic Search on Graft Compatibility in Grapevine

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Plant Cell Biotechnology Lab, Instituto de Tecnologia Química e Biológica António Xavier (Green-it Unit), Avenida da República, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal
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Max Planck Institut für Molekulare Pflanzenphysiologie, Wissenschaftspark Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
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Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Av. Montañana, 930, 50059 Zaragoza, Spain
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InnovPlantProtect CoLab, Estrada de Gil Vaz Apartado 72, 7351-901 Elvas, Portugal
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Author to whom correspondence should be addressed.
Agronomy 2020, 10(5), 706; https://doi.org/10.3390/agronomy10050706
Received: 19 April 2020 / Revised: 4 May 2020 / Accepted: 11 May 2020 / Published: 14 May 2020
(This article belongs to the Section Crop Breeding and Genetics)
Grafting is the most used propagation method in viticulture and is the unique control strategy against Phylloxera. Nevertheless, its practice remains limited mainly due to inconsistent graft success and difficulties in predicting graft compatibility responses of proposed scion–rootstock combinations, slowing down the selection of elite rootstocks. Aiming to identify optimal phenotypic parameters related to graft (in)compatibility, we used four clones of two grapevine cultivars that show different compatibility behavior when grafted onto the same rootstock. Several physiological parameters, internal anatomy of the graft union, chlorophyll fluorescence, and pigment contents of homo- and heterografts were monitored in a nursery-grafting context. The measurements highlighted enhanced performance of the heterografts due to rooting difficulties of Vitis vinifera homografts. This suggests that in viticulture, homografts should only be used as compatibility controls regarding qualitative attributes. By observing the internal anatomy of the union, we found that grapevines might require longer times for graft healing than anticipated. While Affinity Coefficients were not informative to assess incompatibility, leaf chlorophyll concentration analysis proved to be a more sensitive indicator of stress than the analysis of chlorophyll fluorescence. Overall, we conclude that graft take correlated best with callus formation at the graft junction three weeks after grafting. View Full-Text
Keywords: Vitis; grapevine; grafting; graft incompatibility; graft success prediction; rootstock; rootstock breeding; Richter 110; Syrah; Touriga Nacional Vitis; grapevine; grafting; graft incompatibility; graft success prediction; rootstock; rootstock breeding; Richter 110; Syrah; Touriga Nacional
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MDPI and ACS Style

Tedesco, S.; Pina, A.; Fevereiro, P.; Kragler, F. A Phenotypic Search on Graft Compatibility in Grapevine. Agronomy 2020, 10, 706.

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