是以外三元苗猪为主，并有杜洛克、杜长大、大约克、长白山等苗猪。
Are mainly outside the ternary and Duroc, Duroc, Yorkshire, Changbai Mountain, etc. I.
结果表明，梅山猪、宁夏黑猪和杜洛克猪肌内脂肪含量高于长白猪和约克夏猪（P<0.05）。
The results indicated that IMF of Meishan, Ningxia Black and Duroc were higher than that of Landrace and Yerkshire(P<0.05).
用最小二乘法分析SNP对长白猪、约克夏猪和杜洛克猪的背膘厚的效应的结果表明，纯合基因型个体的背膘厚大于杂合基因型个体。
The effects of this SNP on backfat thickness in Landrace, Yorkshire and Duroc were estimated using least square method. The homozygote pigs had thicker backfat than the heterozygote ones.
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