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DOI: 10.3852/mycologia.98.4.560
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Mycologia, 98(4), 2006, pp. 560-570.
© 2006 by The Mycological Society of America

A new species of Epichloë symbiotic with Chinese grasses


Wei Li
Yan-ling Ji
Han-shou Yu
Zhi-wei Wang 1

     Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China

Epichloë species are fungal symbionts (endophytes) of grasses, six European and four North American biological species in genus Epichloë have been described in previous researches. In this study we describe a new Epichloë species, Epichloë yangzii Li et Wang, found in natural symbioses with Roegneria kamoji native to China. We investigated the host specificity, morphology, interfertility tests and molecular phylogenetic evidences of this new species. The results indicated that E. yangzii is host specific and seedborne. Most morphological characteristics of this new species are typical in the genus. However differences are evident in several features including size of perithecia, asci and ascospores. In mating tests E. yangzii was not interfertile with E. elymi isolates from related hosts in genera Elymus. Phylogenetic relationships based on sequences of ß-tubulin gene (tub2) introns and translation elongation factor 1-{alpha} gene (tef1) introns showed that members of the new species grouped into exclusive clades with high bootstrap value.

Key words: E. yangzii, host specificity, interfertility tests, morphology, phylogenetic relationship, Roegneria kamoji

1 Corresponding author. E-mail: zwwang{at}njau.edu.cn




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Copyright © 2006 by The Mycological Society of America.