This is the first report that trehalose can be used as a protector to improve the mutation rate and effects from the ion beam mutation.

首次报道了在离子束诱变技术中采用海藻糖作为保护剂提高突变率和诱变效果。

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Ion implantation as a new mutagen caused high mutation rate and wide mutational spectrum with low damage, and it was also mutated in the direction.

离子注入是一种新型的作物诱变技术。离子注入不仅损伤轻，而且突变率高，突变谱广并可定向引变。

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Lastly, the relationship between gene mutation rate and mutation probability and the application of the model in the analysis of multiple characters are discussed.

最后讨论了基因突变率与突变概率间的相互关系及本模型在多性状分析中的应用问题。

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In a global study conducted by Dr. Steven Narod, senior scientist at Women's College Research Institute in Toronto, the United States had the highest rate of prophylactic mastectomy in BRCA1 and BRCA2 mutation carriers.

CNN: Why more women are choosing double mastectomies