Synergistic Effects of Ethephon and Isourea on Male Sterility of Rice

Japanese Journal of Crop Science

Katsuzo OTA¹  Masahiro KITAOKA¹  Masami OGAWA¹ 

关键词: Ethephon;    イソ尿素;    Gametocide;    イネ(Oryza sativa L.);    Isourea;    エテホン;    Male sterility;    除雄剤;    Rice (Oryza sativa L.);    雄性不稔;   

DOI  :  10.1626/jcs.60.349

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Induction of male sterility in rice by application of ethephon or isourea at different treatments, concentrations and times was investigated in glass house-grown Oryza sativa cv. Nipponbare. Isourea had a promotive effect on uppermost internodal elongation of rice in addition to inducing sterility. The sterile effect was more evident by water application than by foliage treatment. Ethephon also caused sterility by foliage treatment, but it inhibited the elongation of uppermost internode. Single application of 5000 ppm of ethephon or 10 kg/ha of isourea caused incomplete sterility. The combined application of ethephon and isourea, however, showed the synergistic effect on sterility, 95% and more of which was achieved by treatment of isourea 3 kg/ha + ethephon 5000 ppm or isourea 10 kg/ha + ethephon 2500 ppm. The rice plants treated by isourea + ethephon showed 50% or more of fertility by forced application of normal pollens. The antipodal effect of isourea and ethephon on uppermost internodal elongation showed its antagonism when their combinational treatment was conducted, which together with shortening of flag leaf sheath led the normal emergence of panicles.

【 授权许可】

Unknown