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Changes in Seed Yield and Quality with Maturity in Onion (Allium cepa L., cv. 'Early Cream Gold')

journal contribution
posted on 2023-05-16, 13:32 authored by Spurr, C, Fulton, DA, Brown, PH, Clark, RJ
Development of onion (Allium cepa L., cv. 'Early Cream Gold') seed under cool climate conditions in Tasmania, Australia occurred over a longer duration than previously reported, but similar patterns of change in yield components were recorded. In contrast to previous studies, umbel moisture content declined from 85 to 67 % over 57 days while seed moisture content decreased from 85 to 31 %. Seed yield continued to increase over the duration of crop development, with increasing seed weight compensating for seed loss resulting from capsule dehiscence in the later stages of maturation. Germination percentage was high and did not vary significantly from 53 to 77 days after full bloom (DAF), but mean germination time declined and uniformity of germination increased significantly over the same time period. The percentage abnormal seedlings declined with later harvest date, resulting in highest seed quality at 77 DAF. The results of this study suggest that the decision to harvest cool climate onion seed crops before capsule dehiscence will result in a loss of potential seed yield and quality.

History

Publication title

Journal of Agronomy and Crop Science

Volume

188

Issue

4

Pagination

275-280

ISSN

0931-2250

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Blackwell Verlag GmbH

Place of publication

Berlin, Germany

Repository Status

  • Restricted

Socio-economic Objectives

Field grown vegetable crops

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    University Of Tasmania

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