Abstract
Jacquemontia sandwicensis A. Gray (Convolvulaceae) is an endemic, coastal species that has potential use for hanging baskets in Hawaii. Morphological variation exists in the wild, but efforts to collect, characterize and identify selections for hanging baskets have not yet been conducted. The objectives of this study were to: (1) characterize six accessions collected from Maui (Ahihi-Kinau, McGregor and Puhala Bay), Oahu (Lyon Arboretum and Shidler College) and Hawaii (South Point) islands and (2) identify accessions suitable for hanging basket use. Six plants from each accession were propagated and allowed to grow for 3 months under irrigated outdoor conditions. To encourage lateral branching, stems were pruned 10 cm from the base. After another month, 18 morphological traits were recorded and analyzed using ANOVA, principal component analysis and cluster analysis. Five qualitative characters were identified as useful for differentiating the six accessions. Significant differences between accessions were observed in eight quantitative characters. Nine morphological characters significantly contributed to the variation between accessions. Cluster analysis divided the accessions into three groups [Ahihi-Kinau, Shidler College and Lyon Arboretum (Cluster 1); Puhala Bay (Cluster 2); South Point and McGregor (Cluster 3)]. Length of internodes as well as number of lateral branches were the most important selection traits for hanging baskets. These helped identify Puhala Bay, Lyon Arboretum and South Point as potential accessions for hanging baskets.
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Acknowledgements
We would like to thank Maui Nui Botanical Gardens and Lyon Arboretum for providing the plant materials, the Department of Hawaiian Homelands for providing the collection permit for Southpoint and to the Magoon Research Station for the use of their facilities.
Funding
This project was funded by the USDA National Institute of Food and Agriculture, Hatch project HAW08040-H, managed by the College of Tropical Agriculture and Human Resources and the Hawaii Department of Agriculture NEWGERMPLASM17 Grant.
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Antesco, D.K.S., Baldos, O.C. Morphological characterization and identification of Jacquemontia sandwicensis A. Gray (Pa‘uohi‘iaka) accessions for hanging basket use. Genet Resour Crop Evol 67, 1919–1928 (2020). https://doi.org/10.1007/s10722-020-00951-2
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DOI: https://doi.org/10.1007/s10722-020-00951-2