P.S. Devanand*, J. Kevin Johnal, N. Raja, K. Sivakumar, B. Sivakumar, K. Hemaprabha, K.B. Sujatha, V. Vakeswaran, K. Nelson Navamani Raj, R. Vijayan, S. Utharasu, P. Kumar, R. Revathi and K.T. Parthiban
Faculties, Forest College and Research Institute, Mettupalayam 641301
Email: devps25@gmail.com
Received-01.07.2023, Revised-12.07.2023, Accepted-21.07.2023
Abstract: Grafting for several species of genus melia and eucalyptus are carried out to produce new varieties through interspecific hybridization. Grafting is a horticultural technique whereby tissues of plants are joined so as to continue their growth together. The upper part of the combined plant is called the scion, while the lower part is called the rootstock. The success of this joining requires that the vascular tissues grow together. The study successfully established controlled clones deploying Melia dubia, Melia composita and Melia azedarach, these are established in the form of clone based breeding populations to develop hybrids with specific industrial utility similarly clonal plants were also established in eucalyptus deploying superior clones namely EH 02, EH05, and DF 97 which act as a breeding population to develop superior hybrids both for productivity and root quality. From this study, we observed that Melia dubia subjected to 47.16% mortality and Melia azedarach showed good survival with only 20% mortality. Melia composita showed very poor result with 88% mortality. Among the genus Eucalyptus, EH O2 showed very poor results with 95% mortality. EH 05 was successful with 53.3% mortality and DF 97 showed 40% mortality. The success rate of Melia dubia was 52.84% and Melia azedarach was the highest with 80%. Meliacomposita was very poor in survival with only 12% survival rate due to compatibility issues. EH 02 had problems in survival and showed only 5% survival. EH 05 showed convincing performance with 46.7% survival. DF 97 also showed good performance with 60% survival rate. The study is to mainly fulfill the objective of developing breeding populations in melia and eucalyptus to produce new varieties through grafting. Interspecific hybridization is the tool used to develop varieties which can meet up the current trends in demand and also improves the tree in terms of industrial utility.
Keywords: Melia, Eucalyptus, Grafting, Root stock, Scion
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