Morphological characterization and identification of Jacquemontia sandwicensis A. Gray (Pa‘uohi‘iaka) accessions for hanging basket use

Issue Date

10-2020

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.

Source or Periodical Title

Genetic Resources and Crop Evolution

ISSN

0925-9864

Volume

67

Issue

57

Page

1919-1928

Document Type

Article

Language

English

Subject

Cluster analysis, Native Hawaiian plant, Ornamental plants, Plant evaluation, Principal components analysis

Identifier

DOI:10.1007/s10722-020-00951-2

Digital Copy

yes

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