Fig. 1.
Inbreeding and shared ancestry in Indian tigers. Here we show cumulative inbreeding due to parental shared ancestry due to ancestors at different historical time ranges as estimated by different lengths of ROH; that is, ROH ≥ 10 Mb indicate shared ancestry on average up to 3 generations ago, 5-Mb stretches indicate on average up to 5 generations ago, 1-Mb stretches indicate on average up to 26 generations ago, and 0.1-Mb stretches indicate on average up to 263 generations ago. Shown is the cumulative inbreeding in each population due to shared ancestry between parents at each time range. Error bars are 95% CI. (A) Inbreeding in individuals due to shared ancestry 26 generation ago. (B) The proportion of the genome shared in 1-Mb or longer tracts between pairs of individuals from a population of individuals belonging to central large–connected, southern large–connected, and small–isolated populations. Pan-India comparisons in C include all pairwise comparisons of wild individuals. Error bars are SEs. Ne over time is estimated from FROH for the different populations. (D) Error bars are SDs.