Differential inspiratory timing is genetically linked to mouse chromosome 3.

Differential inspiratory timing is genetically linked to mouse chromosome 3.
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吸气计时差异与小鼠 3 号染色体存在遗传关联。

DOI:
10.1152/jappl.1998.85.1.360
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发表时间:
1998
期刊:
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子:
--
通讯作者:
Zhang,L
Zhang,L
中科院分区:
--
文献类型:
--
作者:
Tankersley,CG;DiSilvestre,DA;Jedlicka,AE;Wilkins,HM;Zhang,L

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遗传控制的差异吸气时间(Ti)在基线之前已证明在近亲繁殖的小鼠品系。C3H/HeJ (C3; 188±3 ms)与C57BL/6J (B6; 111±2 ms)祖细胞间的遗传模式符合双基因模式。利用C3和B6祖细胞衍生的重组自交系的菌株分布模式,小鼠3号染色体上的Tiphenotypes与DNA标记的一致性为100%。利用小鼠3号染色体上C3株与B6株之间的21个多态DNA标记对52个B6C3F2(F2)后代进行分型,验证了这一基因型-表型假说。连锁分析通过计算对数似然值来比较标记基因型和基线通气表型。位于d3mit119附近的一个推测的数量性状位点与基线Tiphenotypes显著相关。在峰值(对数似然= 3.3),假定的数量性状位点决定了Tiamong f2后代表型变异的25%。总之,这个通气特征的遗传模型证明了差异基线和小鼠3号染色体上的候选基因组区域之间的重要联系。
Genetic control of differential inspiratory timing (Ti) at baseline has been previously demonstrated among inbred mouse strains. The inheritance pattern for Tibetween C3H/HeJ (C3; 188 ± 3 ms) and C57BL/6J (B6; 111 ± 2 ms) progenitors was consistent with a two-gene model. By using the strain distribution pattern for recombinant inbred strains derived from C3 and B6 progenitors, 100% concordance was established between Tiphenotypes and DNA markers on mouse chromosome 3. This genotype-phenotype hypothesis was tested by typing 52 B6C3F2(F2) progeny by using simple sequence repeat DNA markers (n= 21) polymorphic between C3 and B6 strains on mouse chromosome 3. Linkage analysis compared marker genotypes to baseline ventilatory phenotypes by computing log-likelihood values. A putative quantitative trait locus located in proximity toD3Mit119was significantly associated with baseline Tiphenotypes. At the peak (log-likelihood = 3.3), the putative quantitative trait locus determined 25% of the phenotypic variance in Tiamong F2progeny. In conclusion, this genetic model of ventilatory characteristics demonstrated an important linkage between differential baseline Tiand a candidate genomic region on mouse chromosome 3.
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