CN104053789A - 确定胎儿基因组中预定区域碱基信息的方法、***和计算机可读介质 - Google Patents
确定胎儿基因组中预定区域碱基信息的方法、***和计算机可读介质 Download PDFInfo
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- CN104053789A CN104053789A CN201280067404.1A CN201280067404A CN104053789A CN 104053789 A CN104053789 A CN 104053789A CN 201280067404 A CN201280067404 A CN 201280067404A CN 104053789 A CN104053789 A CN 104053789A
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Abstract
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Claims (1)
- 权利要求书1、 一种确定胎儿基因组中预定区域碱基信息的方法, 其特征在于, 包括下列步骤: 针对胎儿基因组 DNA样本, 构建测序文库;对所述测序文库进行测序, 以便获得胎儿的测序结果, 所述胎儿的测序结果由多个测 序数据构成; 以及基于所述胎儿的测序结果, 结合胎儿遗传相关个体的遗传信息, 根据隐马尔可夫模型, 确定所述预定区域的碱基信息。2、 根据权利要求 1所述的方法, 其特征在于, 所述胎儿基因组 DNA样本是从孕妇外 周血中提取的。3、 根据权利要求 1所述的方法, 其特征在于, 所述测序是利用选自 Illumina-Solexa、 ABI-Solid、 Roche-454和单分子测序装置的至少一种对所述测序文库进行的。4、 根据权利要求 1所述的方法, 其特征在于, 进一步包括将所述胎儿的测序结果与参 照序列进行比对, 以便确定来自于所述预定区域的测序结果。5、 根据权利要求 4所述的方法, 其特征在于, 所述参照序列为人类参考基因组。6、 根据权利要求 1所述的方法, 其特征在于, 所述胎儿遗传相关个体是所述胎儿的父 母。7、根据权利要求 1所述的方法, 其特征在于, 按照惠特比算法, 根据隐马尔可夫模型, 确定所述预定区域的碱基信息。8、 根据权利要求 7所述的方法, 其特征在于, 在所述惠特比算法中, 釆用 0.25作为初 始状态概率分布, 釆用 re/N作为重组概率, 其中 re=25~30 , 优选 25 , N为所述预定区域的 长度,釆 Jk γ, =作为重组转移矩阵, 其中, /^=re/N。9、 根据权利要求 4所述的方法, 其特征在于, 将所述胎儿的测序结果与参照序列进行 比对, 以便确定来自于所述预定区域的测序结果进一步包括按照下列公式确定概率最高的 碱基:Pi se = ∑ (1 - Δ (base, mk ) + ^ ε - Α (base, m ) + 1 ^ · Δ (base, /¾ ) 其巾, e3 X≠ γ10、 根据权利要求 1 所述的方法, 其特征在于, 进一步包括: 所述预定区域为已知存 在遗传多态性的位点。11、 根据权利要求 10所述的方法, 其特征在于, 所述遗传多态性为选自单核苷酸多态 性和 STR的至少一种。12、 一种用于确定胎儿基因组中预定区域碱基信息的***, 其特征在于, 包括: 文库构建装置, 所述文库构建装置适于针对胎儿基因组 DNA样本, 构建测序文库; 测序装置, 所述测序装置与所述文库构建装置相连, 并且适于对所述测序文库进行测 序, 以便获得胎儿的测序结果, 所述胎儿的测序结果由多个测序数据构成;分析装置, 基于所述胎儿的测序结果, 结合胎儿遗传相关个体的遗传信息, 根据隐马 尔可夫模型, 确定所述预定区域的碱基信息。13、 根据权利要求 12所述的***, 其特征在于, 进一步包括 DNA样本分离装置, 所 述 DNA样本分离装置适于从孕妇外周血中提取胎儿基因组 DNA样本。14、 根据权利要求 12所述的***, 其特征在于所述测序装置为选自 Illumina-Solexa、 ABI-Solid、 Roche-454和单分子测序装置的至少一种。15、 根据权利要求 12所述的***, 其特征在于, 进一步包括比对装置, 所述比对装置 与所述测序装置相连, 用于将所述胎儿的测序结果与参照序列进行比对, 以便确定来自于 所述预定区域的测序结果。16、 根据权利要求 12所述的***, 其特征在于, 所述分析装置适于按照惠特比算法, 根据隐马尔可夫模型, 确定所述预定区域的碱基信息。17、 根据权利要求 16所述的***, 其特征在于, 所述惠特比算法釆用 0.25作为初始状 态概率分布, 釆用 re/N作为重组概率, 其中 re=25~30, 优选 25, N为所述预定区域的长度, 釆用 x; 一 ί-ι 一作为重组转移矩阵, 其中, pr=re/N。18、 根据权利要求 15所述的***, 其特征在于, 将所述胎儿的测序结果与参照序列进 行比对, 以便确定来自于所述预定区域的测序结果进一步包括按照下列公式确定概率最高 的碱基: Pi se = ∑ - (1 - Δ (base, mk ) + -s - A (base, m ) + - ^ · Δ (base, fy> )Ae{0,lj 2 2 2其巾,19、 一种计算机可读介质, 其特征在于, 所述计算机可读介质上存储有指令, 所述指 令适于被处理器执行以便基于胎儿的测序结果, 结合胎儿遗传相关个体的遗传信息, 根据 隐马尔可夫模型, 确定预定区域的碱基信息。20、 根据权利要求 19所述的计算机可读介质, 其特征在于, 所述指令适于按照惠特比 算法, 根据隐马尔可夫模型, 确定所述预定区域的碱基信息。21、 根据权利要求 20所述的计算机可读介质, 其特征在于, 在所述惠特比算法中, 釆 用 0.25作为初始状态概率分布, 釆用 re/N作为重组概率, 其中 re=25~30 , 优选 25 , N为所 述预定区域的长度,釆用¾ = Pr(¾ = = γ,_χ作为重组转移矩阵, 其中, /^=re/N。22、 根据权利要求 19所述的计算机可读介质, 其特征在于, 所述指令将所述胎儿的测 序结果与参照序列进行比对, 以便确定来自于所述预定区域的测序结果。23、 根据权利要求 22所述的计算机可读介质, 其特征在于, 所述指令将所述胎儿的测 序结果与参照序列进行比对, 以便确定来自于所述预定区域的测序结果进一步包括按照下 列公式确定概率最高的碱基:Pi se = ∑ (1 - Δ (base, mk ) + ^ ε - Α (base, m ) + 1 ^ · Δ (base, /¾ ) 其巾,(, .. I l - e ,¾二 vA(j,_ )二24、 根据权利要求 19所述的计算机可读介质, 其特征在于, 进一步包括: 所述预定区 域为已知存在遗传多态性的位点。 25、 根据权利要求 24所述的计算机可读介质, 其特征在于' 所述遗传多态性为选自单 核苷酸多态性和 STR的至少一种。
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US11091794B2 (en) | 2019-08-16 | 2021-08-17 | The Chinese University Of Hong Kong | Determination of base modifications of nucleic acids |
GB2590032B (en) * | 2019-08-16 | 2021-12-08 | Univ Hong Kong Chinese | Determination of base modifications of nucleic acids |
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WO2021032060A1 (en) * | 2019-08-16 | 2021-02-25 | The Chinese University Of Hong Kong | Determination of base modifications of nucleic acids |
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CN117392673A (zh) * | 2023-12-12 | 2024-01-12 | 深圳赛陆医疗科技有限公司 | 碱基识别方法及装置、基因测序仪及介质 |
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