arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.3463stat.APstat.ML
收藏

用于基因组关联、预测和选择的局部上位性基因组关系矩阵

Locally epistatic genomic relationship matrices for genomic association, prediction and selection

Deniz Akdemir

摘要:

随着遗传信息的数量和复杂性的增加,我们有必要探索一些有效的方法来处理这些数据。本研究采用分而治之的方法分析高维基因组数据。我们的目标包括减少一次处理一个问题的维度,提高模型的性能和可解释性。我们建议使用基因组中的固有结构;将更大的问题分成可管理的部分。在植物和动物育种研究中,对个体的商业价值(加性+上位性遗传效应)和育种价值(加性遗传效应)进行了区分,因为预计某些上位性遗传效应将因重组而丧失。在本文中,我们认为,育种者可以利用一些上位标记的影响,在低重组的地区。本文介绍的模型旨在利用遗传图谱信息估计局部上位性品系遗传力,并结合局部加性和上位性效应。为此,我们使用了半参数混合模型与多个局部基因组关系矩阵与分层检验设计和套索后处理的稀疏性,在最终的模型和速度。我们的模型产生了良好的预测性能以及遗传关联信息。

英文摘要:

As the amount and complexity of genetic information increases it is necessary that we explore some efficient ways of handling these data. This study takes the "divide and conquer" approach for analyzing high dimensional genomic data. Our aims include reducing the dimensionality of the problem that has to be dealt one at a time, improving the performance and interpretability of the models. We propose using the inherent structures in the genome; to divide the bigger problem into manageable parts. In plant and animal breeding studies a distinction is made between the commercial value (additive + epistatic genetic effects) and the breeding value (additive genetic effects) of an individual since it is expected that some of the epistatic genetic effects will be lost due to recombination. In this paper, we argue that the breeder can take advantage of some of the epistatic marker effects in regions of low recombination. The models introduced here aim to estimate local epistatic line heritability by using the genetic map information and combine the local additive and epistatic effects. To this end, we have used semi-parametric mixed models with multiple local genomic relationship matrices with hierarchical testing designs and lasso post-processing for sparsity in the final model and speed. Our models produce good predictive performance along with genetic association information.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑