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

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posted on 2023-05-20, 15:45 authored by Gaffney, A, Bohman, B, Stephen QuarrellStephen Quarrell, Brown, PH, Geoff AllenGeoff 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.

Funding

Horticulture Innovation Australia

History

Publication title

Insects

Volume

11

Issue

7

Article number

402

Number

402

Pagination

1-13

ISSN

2075-4450

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

MDPI

Place of publication

Switzerland

Rights statement

Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

Repository Status

  • Open

Socio-economic Objectives

Field grown vegetable crops

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