During gestation, BW and backfat gain did not differ between treatment groups.
整个妊娠期，两组间体重和背膘厚均无显著差异。
Genetic improvement can play a significant role in improving marbling and tenderness while reducing backfat.
遗传改良对于提高大理石纹和嫩度的同时减少脂肪厚起着重要的作用。
On parturition day and the 28~(th) day, backfat thickness, body weight of lactation sows were recorded respectively.
在分娩当天、第28天分别记录母猪背膘厚和体重；
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