Temperature related instability of a naturally induced cytoplasmic male sterility in industrial chicory (Cichorium intybus L.)

Jeroen Van der Veken, Stany Vandermoere, Olivier Maudoux, Christine Notté, Tom Eeckhaut, Joost Baert, Stefaan Werbrouck, Johan Van Huylenbroeck

    Research output: Contribution to journalA1: Web of Science-articlepeer-review

    Abstract

    Abstract Natural alloplasmic cytoplasmic male sterile (CMS) clones of industrial chicory were obtained after crossing wild chicory with selected breeding lines. We investigated the CMS stability of 10 clones in various environmental growing conditions. CMS was stable under cool growing conditions in most of them. Fertility restoration, based on pollen production scores, was observed in all clones after a period of hot temperatures. The early flower bud stage was sensitive, resulting in fertile flowers 12–17 days after exposure to high temperatures. Experiments under controlled growing conditions at 15°C demonstrated that a heat shock of 2 days at 25 or 30°C was sufficient to restore fertility. Sterile flowers were formed when plants were again grown at lower temperatures. Significant differences between individual clones were observed, indicating the potential of genetic selection to obtain stable CMS parent lines.
    Original languageEnglish
    JournalPlant Breeding
    Volume137
    Issue number3
    Pages (from-to)423-432
    Number of pages10
    ISSN0179-9541
    DOIs
    Publication statusPublished - 4-Jun-2018

    Keywords

    • alloplasmic male sterility, cytoplasmic male sterility, fertility, heat shock, pollen production

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