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Temperature related instability of a naturally induced cytoplasmic male sterility in industrial chicory ( Cichorium intybus L.)
Author(s) -
Van der Veken Jeroen,
Vandermoere Stany,
Maudoux Olivier,
Notté Christine,
Eeckhaut Tom,
Baert Joost,
Werbrouck Stefaan,
Van Huylenbroeck Johan
Publication year - 2018
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12582
Subject(s) - cichorium , biology , sterility , cytoplasmic male sterility , pollen , fertility , botany , horticulture , population , demography , sociology
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.