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定位數量性狀基因座之分位數迴歸法

Quantile Regression Methods for Mapping Quantitative Trait Loci

摘要


許多定位數量性狀基因座(quantitative trail loci; QTLs)的統計方法已被廣泛地討論與發展,包括有使用傳統或廣義線性模式、Cox比例風險模式(Cox's proportional hazards model)、加速失敗時間模式(accelerated failure time model)等。而分位數迴歸模式(quantile regression model)在評估數量性狀之遺傳效應時,具有很大的彈性,但以此模式為主的區間定位,卻不常見於文獻中之討論。本文考慮區間定位的分位數迴歸法,發展QTLs效應與位置偵測之統計推論,並且分析一筆感染Listeria Monocytogenes老鼠存活時間的實際資料,用以說明文中所建議的統計方法。

並列摘要


Most statistical models for mapping quantitative trait loci (QTLs) have been extensively discussed and developed, including traditional or generalized linear models, Cox's proportional hazards models, and accelerated failure time models, etc. Quantile regression models offer great flexibility in assessing genotype effects on quantiles of quantitative trail, but little work has been done on the interval-mapping through the quantile model. This paper considers quantile regression methodologies for interval-mapping and develops statistical inferences for the effect and location of QTLs. An analysis of the Listeria Monocytogenes mice data is provided to illustrate our proposed methods.

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