preculture procedure 预培养程序
The yield of callus increased apparently by higher temperature preculture for a short time.
短期高温预培养可明显提高愈伤组织的产量；
We evaluated the effects of the duration of sonication treatment, length of explant preculture, addition of acetosyringone (AS) and the orientation of the explants during the co cultivation...
并对超声波处理时间、外植体放置方向、预培养时间、外植体类型、乙酰丁香酮等影响因素进行了优化。
Wheat genotypes Yangmai 158, Yangmai 10 are excellent transformation materials. Wheat immature embryos with 4 days preculture have high tissue culture response and strong regeneration capacity.
小麦基因型扬麦158、扬麦10是优良的转化材料，以预培养4天的小麦幼胚为受体，培养力高，再生能力强。
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