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。
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。
Both the average number and length of introgressed segments decreased along with the increase of backcross generations.
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