粒重是作物产量的重要构成因素之一，由来源于自然变异的数量性状基因座(QTL)控制。
Grain weight is one of the most important components of grain yield and is controlled by quantitative trait loci (QTLs) derived from natural variations in crops.
被检岩羊的多态性基因座比例为46．2％，表明岩羊的血液生化遗传基因座有颇大的遗传变异性。
The proportion of polymorphic loci was 46. 2% in blue sheep examined, suggesting that there was considerable genetic variability on the loci of biochemical genetics in blood of blue sheep.
采用PCR-RFLP技术检测了大约克、长白、杜洛克、宁乡、沙子岭和大围子6个品种共867头猪的E．coli F18受体（ECF18R）基因座的遗传变异。
The genetic variation of E. coli F18 receptor (ECF18R) loci in 867 pigs including Large Yorkshire, Landrace, Duroc, Ningxiang pig, Shaziling pig and Daweizi pig was detected by PCR-RFLP with Hin6 I.
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