John McCallum

72 papers and 2.1k indexed citations i.

About

John McCallum is a scholar working on Plant Science, Molecular Biology and Biochemistry. According to data from OpenAlex, John McCallum has authored 72 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Plant Science, 27 papers in Molecular Biology and 8 papers in Biochemistry. Recurrent topics in John McCallum’s work include Garlic and Onion Studies (36 papers), Plant Disease Resistance and Genetics (27 papers) and Nitrogen and Sulfur Effects on Brassica (9 papers). John McCallum is often cited by papers focused on Garlic and Onion Studies (36 papers), Plant Disease Resistance and Genetics (27 papers) and Nitrogen and Sulfur Effects on Brassica (9 papers). John McCallum collaborates with scholars based in New Zealand, United States and Japan. John McCallum's co-authors include Meeghan Pither-Joyce, Michael J. Havey, John R. Walker, Martin Shaw, Fernand Kenel, Samantha Baldwin, Richard Macknight, Robyn Lee, Gail M. Timmerman‐Vaughan and Mohammed R. Koupai‐Abyazani and has published in prestigious journals such as Nature Communications, PLoS ONE and The Plant Cell.

In The Last Decade

Co-authorship network of co-authors of John McCallum i

Fields of papers citing papers by John McCallum

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John McCallum. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John McCallum. The network helps show where John McCallum may publish in the future.

Countries citing papers authored by John McCallum

Since Specialization
Citations

This map shows the geographic impact of John McCallum's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John McCallum with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John McCallum more than expected).

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar’s output or impact.

Explore authors with similar magnitude of impact

Rankless by CCL
2025