ABSTRACT Root rot caused by Fusarium species is a significant disease in the main soybean‐producing provinces of Thailand. Fusarium isolates ( n = 85) were obtained from soybean plants showing symptoms of root rot. Representative isolates were identified by multilocus phylogenetic analysis with combined sequences of the translation elongation factor 1‐α ( tef1 ) and RNA polymerase second largest subunit ( rpb2 ) for Fusarium solani species complex (FSSC) and Fusarium incarnatum ‐ equiseti species complex (FIESC) or tef1 , rpb2 and Calmodulin ( CaM ) for Fusarium oxysporum species complex (FOSC). In this study, we obtained 11 Fusarium species from three species complexes including: F. falciforme , F. suttonianum and F. solani from the FSSC, F. callistephi , F. cugenangense , F. nirenbergiae , F. triseptatum , F. glycines and F. gossypinum from the FOSC and F. jinanense and F. sulawesiense from the FIESC. Representative isolates from different Fusarium species were used for their pathogenicity indicating that F. falciforme and F. jinanense were more pathogenic than other species to soybean. To the best of our knowledge, this is the first report of F. callistephi , F. cugenangense , F. nirenbergiae , F. triseptatum , F. glycines , F. gossypinum and F. jinanense associated with soybean root rot globally. The findings of this study enhance our understanding of the genetic diversity and pathogenic potential of the Fusarium species and support the development of resistant soybean cultivars and effective disease management strategies for soybean production worldwide.
Prasansak et al. (Sun,) studied this question.