Low transformation ration, non-100% sterility, unstable sterility and difficult restoration of fertility are all existing problems needing further research and resolutions.
同时存在转化率低、不育度难以达到100%、不育性不稳定或育性恢复难等问题，有待于进一步研究与解决。
Low transformation ration, non-100% sterility, unstable sterility and difficult restoration of fertility are all existing problems needing further research and resolutions.
同时存在转化率低、不育度难以达到100%、不育性不稳定或育性恢复难等问题，有待于进一步研究与解决。
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