Grafting compatibility between species of the order Brassicales

M.A. Ruiz, O.K. Yamanishi
The practice of grafting has been used for millennia to increase uniformity, vigor and resistance of plants propagated vegetatively. For two plants to be grafted successfully, there must be compatibility between both parts involved. This condition is a physiological character, determined by genetic factors. Often, grafting is used inside botanical genera. However, there are cases in which different plant families can be successfully grafted. The family Caricaceae has a wide distribution. Its taxonomic classification divides the family in 35 species and six genera: Carica, Vasconcellea, Cylicomorpha, Jacaratia, Jarilla and Horovitzia. The genus Carica is monospecific, containing only Carica papaya. An alternative to genetic crossing of the different species is the use of inter-generic grafts, using plants with desirable characteristics as rootstocks and cultivars of commercial papaya for scions. The aim of this study was to evaluate, in a greenhouse, papaya compatibility in Jacaratia spinosa, Vasconcellea cf. goudotiana and Moringa olerifera rootstocks. The results found in this study allow us to confirm the possibility of grafting between Caricaceae materials, particularly when environmental conditions are favorable. Compatibility was not shown for Carica papaya scion grafted on Jacaratia spinosa or M. olerifera rootstocks. The possibility of inter-generic grafting was confirmed within the family Caricaceae using Carica papaya on Vasconcellea cf. goudotiana, a confirmation that opens the possibility to use sources of resistance or tolerance to soil diseases present in the genus Vasconcellea and not present in Carica.
Ruiz, M.A. and Yamanishi, O.K. (2019). Grafting compatibility between species of the order Brassicales. Acta Hortic. 1250, 179-186
DOI: 10.17660/ActaHortic.2019.1250.25
Carica papaya, Jacaratia spinosa, Vasconcellea cf. goudotiana, Moringa olerifera, rootstocks, papaya

Acta Horticulturae