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Author Review: Tatiana Zerjal

Tatiana Zerjal is a highly productive genomics scientist with a career spanning three decades. OpenAlex records 196 works, ~9,940 citations, and an h-index of 34 for the primary author profile (OpenAlex profile for Tatiana Zerjal); Semantic Scholar records 83 papers, h-index 31, and 9,850 citations.

Career Trajectory and Impact

Zerjal contributed to landmark human population-genetics papers, including the Nature study of global copy-number variation (~4,400 citations), Y-chromosomal diversity in Europe (~620 citations), and first-authored 'The Genetic Legacy of the Mongols' (~567 citations), plus the Jefferson paternity case (~276 citations) (Nature CNV map paper) (Mongol Y-lineage paper). Her career later pivoted to livestock genomics: QTL detection in laying hens, chicken lncRNA atlases, heat-stress robustness meta-analyses, and avian epigenetics.

The citation peak in 2006 reflects the CNV Nature paper; continued citation through 2019–2021 confirms sustained relevance of the livestock and epigenetics work. Recent works (2022–2026) have low citation counts, as expected for very new output.

Featured Recent Work: Quail Epigenetic Inheritance

Zerjal is a co-author on a 2026 preprint analyzing 1,261 quail methylomes across generations, finding no epiline DMCs in G0 but 621 in G1 and 1,381 in G2, with DMC heritability of 0.54–0.63 versus 0.19 genome-wide, and minimal epiline FST (mean 0.004). The authors carefully note that DMCs with <1% methylation differences may lack biological relevance and that genetics alone cannot fully explain the pattern (author interpretation) (Quail multigenerational methylome preprint). The large sample sizes, mirror-mating design, open data/code, and explicit falsification criteria reflect strong methodological rigor; blindspots include RRBS ascertainment bias, blood-only sampling, and untested germline transmission.

Overall Assessment

Zerjal demonstrates an unusual and valuable breadth: from human evolutionary genomics to applied poultry genetics to epigenetic-inheritance methodology. Blindspots: heavy reliance on collaborative middle/last positions in most top works; several conference abstracts and corrections in the record; and the flagship 2026 epigenetics paper's conclusions on transgenerational methylation remain interpretation-laden pending the SNP-covariate test the authors themselves flag.

 BGPT Author Review

Scientific Quality

High-impact career spanning landmark human genomics (CNV map, Mongol Y-lineage) and rigorous livestock epigenetics with large sample designs, open data, and explicit falsification criteria. Recent work is interpretation-cautious; contribution is often collaborative rather than sole-leadership; some conference-abstract padding in the record.

Communication Quality

First-authored classics like the Mongol legacy paper communicated complex findings clearly to broad audiences; recent papers report transparent methods and data links, though technical density and conference abstracts reduce accessibility.

Author Novelty

Co-authored a field-defining CNV atlas and a famous Y-chromosome legacy finding; recent avian transgenerational methylation work is novel and among the largest methylome-scale animal designs, though incremental relative to human-genomics landmarks.

Scientific Rigor

Recent work uses mirror-mating designs, FDR control, GCTA/REML heritability, meQTL analysis, permutation checks, open code and data, and self-identified falsification criteria. Limitations acknowledged: RRBS bias, blood-only tissue, unverified germline transmission.