Plant Disease (2022) 106, 1669-1674

Liang-Fen Yin, Song Huang, Qin Tan, Yang Zhou, Guo-Qing Li and Chao-Xi Luo (2022)
Identification of Monilia species in Tibet and characterization of M. yunnanensis in China
Plant Disease 106 (6), 1669-1674
Abstract: Samples of peach and plum fruits with brown rot symptoms were collected from Tibet in 2019 and 2020, and the causal agent was identified as Monilia yunnanensis, which represents the first characterization of Monilia spp. on peach and plum in Tibet. Morphological investigation showed that some conidia from naturally diseased fruits were larger than those observed in previously isolated M. yunnanensis. Some conidia of M. yunnanensis isolates from Tibet produced more than two, even up to six germ tubes from different parts of each conidium, instead of one or two germ tubes developing from the pointy sides of each conidium. The alignment of ribosomal internal transcribed spacer region sequences revealed that some isolates from Tibet displayed a mutation at the 374th position from adenine (A) to cytosine (C). Although abovementioned differences were observed between isolates from Tibet and other regions, phylogenetic analysis indicated that all of the M. yunnanensis isolates from different stone fruits and different regions in China were clustered together without obvious genetic differentiation. These results revealed that hosts and geographic environments did not play a major role in the evolution of M. yunnanensis.
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Link to article at publishers website
Database assignments for author(s): Chao-Xi Luo

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Monilinia yunnanensis	Peach/nectarine (Prunus persica)	China (NW)
	Monilinia yunnanensis	Plum/prune (Prunus domestica)	China (NW)