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It is not all about being sweet: Differences in floral traits and insect visitation among hybrid carrot cultivars

journal contribution
posted on 31.08.2020, 00:00 by A Gaffney, B Bohman, SR Quarrell, Philip Brown, GR Allen
Cytoplasmically male-sterile (CMS) carrot cultivars suffer from low pollination rates. In this study, insect visitation varied more than eightfold between 17 CMS carrot cultivars in a field-based cultivar evaluation trial. The visitation rates of honey bees, nectar scarabs, muscoid flies, and wasps each significantly differed among these cultivars. No significant difference in visitation rates was observed among cultivars of different CMS type (brown-anther or petaloid) or flower colour, but cultivars of Berlicumer root type had significantly higher insect visitation rates than Nantes. Six cultivars were further compared in regard to selected umbel traits: as umbel diameter increased, so did the visitation of soldier beetles, while that of honey bees decreased. Finally, nectar of these six cultivars was analysed for sugar content, which revealed monosaccharides to be the most common sugars in all. There was high variation in the levels of sugars from individual umbellets but no significant difference in nectar sugar composition among cultivars, suggesting that nectar sugar composition is of minor importance regarding pollinator attraction to hybrid CMS carrot umbels. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

11

Issue

7

Start Page

1

End Page

13

Number of Pages

13

eISSN

2075-4450

Publisher

M D P I AG

Additional Rights

CC BY 4.0

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

26/06/2020

External Author Affiliations

University of Tasmania; The University of Western Australia

Era Eligible

Yes

Journal

Insects

Licence

Exports

CQUniversity

Licence

Exports