The 291 S type photo - thermo - sensitive male sterile line has good application prospect in - line hybrid wheat breeding system.

291S类型的光温敏不育材料在两系法杂交小麦育种上具有良好的应用前景.

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The experiment studies on virus - free seed potato miniaturization breeding system and matching commercial potato cultivation techniques.

本文研究了冀中南地区马铃薯脱毒种薯小型化繁育体系和配套商品薯栽培技术问题.

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