主要组织相容性复合体（MHC）是一群紧密连锁的基因，编码主要组织相容性抗原，在脊椎动物机体的免疫应答中具有重要作用。
The major histocompatibility complex( MHC) is a group of closely-linked gene, Which code the major histocompatibility antigen and play a critical role in immune response in vertebrate animals.
目的探讨中国汉族人群5-羟色胺转运体基因连锁多态性区域（5-HTTLPR）与抑郁症及临床特征的相关性。
Objective To investigate the association of the polymorphism of serotonin transporter gene linked polymorphic(5-HTTLPR) region with depression and its clinical symptoms in the Han Chinese.
ALAS2的缺失能导致红细胞发育的停滞，ALAS2基因的遗传性突变能引起X-连锁的成高铁红细胞贫血（XLSA）。
The absence of ALAS2 leads to maturation arrest of primitive erythroid cells. Heritable mutations of ALAS2 gene are responsible for the human X-linked sideroblastic anemia (XLSA).
主要组织相容性复合物（MHC）是由紧密连锁的高度多态的基因位点所组成的染色体上的一个遗传区域，它在脊椎动物机体的免疫系统中发挥着非常重要的作用。
MHC is a chromosomal region consisting of a group of closely linked loci which are highly polymorphic, and plays a central role in the immune system.
对于无倒位的家系，利用基因多态性进行遗传连锁分析较为有效可行。
For families without inversions, it is easier and more cost-effective to undertake linkage analysis of genetic polymorphism based on PCR.
利用随机引物对基因组DNA扩增结果表明，NIL -PL0 1和NIL -APL0 1之间多态性差异较小，遗传同质性达98.6 % ，该材料正用于筛选与无花瓣性状紧密连锁的分子标记。
The genomic DNA PCR indicated that the genetic homogeneity between NIL-PL01 and NIL-APL01 reached 98.6%, which were being used in screening the molecular marker linked to apetalous trait.
利用随机引物对基因组DNA扩增结果表明，NIL -PL0 1和NIL -APL0 1之间多态性差异较小，遗传同质性达98.6 % ，该材料正用于筛选与无花瓣性状紧密连锁的分子标记。
The genomic DNA PCR indicated that the genetic homogeneity between NIL-PL01 and NIL-APL01 reached 98.6%, which were being used in screening the molecular marker linked to apetalous trait.
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