Abstract
Differences between Neonectria castaneicola, which causes stem and perennial canker of trees, and Neo. rugulosa have not been clearly shown in previous studies. In this study these two species were compared in detail using 17 Japanese isolates consisting of 10 strains of Neo. castaneicola and seven of Neo. rugulosa. Fourspored asci were constantly found in Neo. castaneicola and this species produced larger ascospores and macroconidia than Neo. rugulosa which produced eight-spored asci. The mating system of Neo. castaneicola was homothallic while Neo. rugulosa was heterothallic. Characters in each species, such as the number of ascospores in an ascus and mating system, were constantly transferred to the 3rd generation. Molecular analysis revealed that the 10 isolates of Neo. castaneicola and seven of Neo. rugulosa were differentiated using rDNA sequence data from the nuclear rDNA ITS region. Moreover, Neo. castaneicola and Neo. rugulosa were separated into different clades. From these results, it was concluded that Neo. castaneicola should be maintained as an independent species, separate from Neo. rugulosa. The isolates of Neo. rugulosa used in this study were the first reported in Japan and found on Castanea crenata, Castanopsis sp., Myrica rubra and Quercus acutissima.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
