Variance and limiting distribution of coalescence times in a diploid model of a consanguineous population.
Variance and limiting distribution of coalescence times in a diploid model of a consanguineous population.
复制标题
同源群体二倍体模型中聚并时间的方差和极限分布。
DOI:
10.1016/j.tpb.2021.02.002
复制
发表时间:
2021-06
影响因子:
1.4
通讯作者:
Rosenberg NA
中科院分区:
文献类型:
--
作者:
Severson AL;Carmi S;Rosenberg NA
Recent modeling studies interested in runs of homozygosity (ROH) and identity by descent (IBD) have sought to connect these properties of genomic sharing to pairwise coalescence times. Here, we examine a variety of features of pairwise coalescence times in models that consider consanguinity. In particular, we extend a recent diploid analysis of mean coalescence times for lineage pairs within and between individuals in a consanguineous population to derive the variance of coalescence times, studying its dependence on the frequency of consanguinity and the kinship coefficient of consanguineous relationships. We also introduce a separation-of-time-scales approach that treats consanguinity models analogously to mathematically similar phenomena such as partial selfing, using this approach to obtain coalescence-time distributions. This approach shows that the consanguinity model behaves similarly to a standard coalescent, scaling population size by a factor 1 − 3c, where c represents the kinship coefficient of a randomly chosen mating pair. It provides the explanation for an earlier result describing mean coalescence time in the consanguinity model in terms of c. The results extend the potential to make predictions about ROH and IBD in relation to demographic parameters of diploid populations.
登录
查看更多内容
影响因子:
3.3
作者:
Sjödin, P;Kaj, I;Nordborg, M
通讯作者:
Nordborg, M
影响因子:
1.4
作者:
Ramachandran, Sohini;Rosenberg, Noah A.;Feldman, Marcus W.;Wakeley, John
通讯作者:
Wakeley, John
影响因子:
3.3
作者:
Carmi, Shai;Palamara, Pier Francesco;Pe'er, Itsik
通讯作者:
Pe'er, Itsik
影响因子:
64.8
作者:
Rohde, DLT;Olson, S;Chang, JT
通讯作者:
Chang, JT
DOI:
10.1073/pnas.1601080113
发表时间:
2016-07-19
影响因子:
11.1
作者:
Wakeley, John;King, Leandra;Wilton, Peter R.
通讯作者:
Wilton, Peter R.