Breeding Science
Online ISSN : 1347-3735
Print ISSN : 1344-7610
ISSN-L : 1344-7610
Male Sterility in Sugar Beet Induced by Cooling Treatment and its Application to Cross-pollination for Breeding
Toshikazu KuranouchiKentaro KawaguchiMasakatsu Tanaka
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Keywords: hybrid seed
JOURNAL FREE ACCESS

2000 Volume 50 Issue 4 Pages 283-289

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Abstract
Male sterility was induced in sugar beet plants by cooling treatment at the early bud stage. The percentage of male sterile flowers was higher the longer the cooling treatment and lower the temperature from 5°C to 3°C. Complete male sterility was induced by the treatment at 3°C for 50 days or 5°C for 70 days. Microscopic observations confirmed that the microspores and tapetum cells were more sensitive to cool temperature than somatic cells within a sugar beet anther. Female organs in the male sterile plants under cooling were not fatally injured and they could produce hybrid seeds by crossing with normal pollen. These results indicated that cooling treatment, which induced male sterility in sugar beet plants, was applicable as a method of castration in the breeding system.
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© Japanese Society of Breeding
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