Both the average number and length of introgressed segments decreased along with the increase of backcross generations.
统计分析表明，平均导入片段数和平均导入片段长度均随回交世代的增加而逐渐减少。
Single segment substitution lines (SSSL) containing only one segment of donor chromosome introgressed into a recipient genetic background permits QTLs to be mapped with greater precision.
目的单片段代换系（SSSL）是通过高代回交和分子标记辅助选择构建的，只含有来自供体亲本的一个染色体片段，遗传背景与受体亲本相同的品系。
Single segment substitution lines (SSSL) containing only one segment of donor chromosome introgressed into a recipient genetic background permits QTLs to be mapped with greater precision.
目的单片段代换系（SSSL）是通过高代回交和分子标记辅助选择构建的，只含有来自供体亲本的一个染色体片段，遗传背景与受体亲本相同的品系。
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