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Preliminary evaluation of macadamia rootstocks for yield and tree height

Neal, J. M. and Kelly, A. and Hardner, C. M. and McConchie, C. and Topp, B. L. (2016) Preliminary evaluation of macadamia rootstocks for yield and tree height. Acta Horticulturae (1109). ISSN 978-94-62611-03-0

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Article Link(s): http://dx.doi.org/10.17660/ActaHortic.2016.1109.30

Publisher URL: http://www.actahort.org/books/1109/1109_30.htm

Abstract

Rootstock has profound effects on traits such as yield and tree size in various horticultural industries, however relatively little is known about rootstock effects for macadamia. In this study, 12 cultivars were propagated as open-pollinated seedling and clonal rootstocks, and own-rooted cuttings. The same cultivars were also used as scions, and grafted to a subset of rootstocks, then planted at four trial locations. In this preliminary analysis, rootstock accounted for 19% of the variance in yield compared with 72% for scion, and 23% in height compared with 72% for scion. There was no interaction between rootstock and scion for yield, and only a small effect for height. The interaction between rootstock and propagation method (seedling, clonal, own roots) was not significant for height. A small effect was observed for yield, with the own roots treatment producing significantly lower yield than grafted trees for all rootstock cultivars except 'HAES 849'. 'H2' seedling rootstock produced a cumulative yield to age 10 years of 11.1 kg tree -1 compared to the highest yield of 13.6 kg tree -1 for 'Beaumont' clonal rootstocks. 'H2' seedling rootstock produced 4.8 m trees at age 11 years, compared to the smallest grafted tree which was 'HAES 849' seedling at 4.7 m.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:FF003Horticultural Crops (NEW March 2000) FF020Plant Breeding and Genetics FF100Plant Production FF160Plant Propagation crop yield cultivars cuttings plant height propagation roots rootstocks scions seedlings Australia Queensland Macadamia integrifolia Macadamia tetraphylla APEC countries Australasia Oceania Commonwealth of Nations Developed Countries OECD Countries Macadamia Proteaceae Proteales dicotyledons angiosperms Spermatophyta plants eukaryotes Australia
Subjects:Science > Botany > Plant physiology
Plant culture > Propagation
Deposited On:12 Aug 2016 03:43
Last Modified:12 Aug 2016 03:43

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