Assessment of Risk of Establishment of Wheat Dwarf Bunt (Tilletia controversa) in China

Abstract

Wheat dwarf bunt, caused by Tilletia controversa K??hn (TCK), is an important quarantine wheat disease throughout the world. Based on published research results of the biology and the epidemiology of the disease, the main factors including temperature, humidity, snow cover, and their parameters relating to teliospore germination, infection and epidemics of TCK were determined. The geophytopathological models for the risk analysis of wheat dwarf bunt establishment were modified. Fifty-year meteorologic data from about 500 weather stations in China were used to calculate the probabilities of TCK establishment in different geographic sites with the models. The map that displays the establishment risk of TCK in winter wheat growing regions in China was generated by using geographical information system (GIS). The zones showing high, moderate, low, and very low, including no risk, of TCK establishment accounted for 27.33, 27.69, 38.12, and 6.86% of total winter wheat growing areas in China, respectively. These results will provide useful information to formulate quarantine regulations and wheat importation policy in China

Transcriptome analysis of wheat spikes in response to Tilletia controversa Kühn which cause wheat dwarf bunt

“…Because of the quarantine importance of DBW in many countries worldwide regarding wheat production 15 , 16 , most studies have focused on pathogen detection 17 – 21 . Assessments of the risk of establishing the disease in China was also reported 22 , 23 , and these studies mentioned that there were several very high-risk zones in the main winter wheat growing regions, including the northern Xinjiang Uygur Autonomous Region, Tibet, Sichuan, Henan, Shandong, and the Huaihe River Valley. However, few studies have investigated the molecular mechanism governing the interactions of wheat with T. controversa .…”

Biodiversity of Plant Pathogens in the Context of International Economic Issue: Case Study of Tilletia Controversa Kuehn

“…Maddux [7] in the state of Kansas whose soil and climatic conditions are similar to the ones in northern China where wheat is cultivated confirmed the possibility of dwarf smut expansion. Moreover, Wen-mmg Jia et al [8] developed a dwarf swut expansion risk assessment map based on five-year data from five hundred Chinese meteorological stations, information on pathogen biology and ecology and disease epiphytotiology, using GIS technology. The map formed a basis for quarantine regulatory acts.…”

Comparative genomics reveals low levels of inter- and intraspecies diversity in the causal agents of dwarf and common bunt of wheat and hint at conspecificity of Tilletia caries and T. laevis

“…However, in recent years the disease has also been observed to extend to lowland regions in Germany (Rudloff et al 2020 ). Tilletia controversa is economically important for international seed trading because it is a quarantine pathogen in several countries (Mathre 1996 ; Whitaker et al 2001 ; Peterson et al 2009 ; Jia et al 2013 ).…”