Global Analysis of Populations Shows Clonal Reproduction for the Coffee Leaf Rust Pathogen Throughout Most of Its Range.

Abstract in brief

• The study investigates the reproductive behavior of the coffee leaf rust pathogen, which causes significant damage to coffee crops worldwide, and finds that it reproduces predominantly through asexual means across various regions including Africa, Asia, the Caribbean, and the Americas.
• Population genetic analyses using specific DNA markers indicate that the fungus maintains a clonal population structure, with little evidence of sexual reproduction, suggesting that the pathogen spreads mainly through cloning rather than mating.
• These findings are important for developing strategies to breed resistant coffee varieties and manage the disease more effectively, since understanding the pathogen’s reproduction helps predict its potential for spread and evolution.