Abstract
Chinese chestnut (Castanea mollissima) is an important crop tree species in China. In the present study, Cytospora specimens were collected from Chinese chestnut trees and identified using molecular data of combined ITS, LSU, ACT and RPB2 loci, as well as morphological features. As a result, two new Cytospora species and four new host records were confirmed, viz. C. kuanchengensissp. nov., C. xinglongensissp. nov., C. ceratospermopsis, C. leucostoma, C. myrtagena and C. schulzeri.
Highlights
Chinese chestnut (Castanea mollissima) is a widely cultivated crop tree species in China, producing nutritious and delicious nuts for humans (Lu and Guo 2016)
Several diaporthalean species were described from Chinese chestnut trees for the clear taxo
The alignment based on the combined sequence dataset (ITS, LSU, ACT and RPB2) included 124 ingroup taxa and one outgroup taxon, comprising 2097 characters in the aligned matrix
Summary
Chinese chestnut (Castanea mollissima) is a widely cultivated crop tree species in China, producing nutritious and delicious nuts for humans (Lu and Guo 2016). Cryphonectria parasitica and several fungi are causing severe chestnut diseases worldwide, which reduce the nut production, even killing the hosts. Cytospora (Cytosporaceae, Diaporthales) is a widely distributed genus worldwide, occurring on a broad range of hosts (Sarma and Hyde 2001, Yang et al 2015, Lawrence et al 2017, Norphanphoun et al 2017, 2018, Wijayawardene et al 2018, Jayawardena et al 2019, Phookamsak et al 2019, Fan et al 2020). Several recent studies discovered new species of Cytospora using multiphasic analyses (Lawrence et al 2018, Norphanphoun et al 2017, 2018, Senanayake et al 2017, 2018, Pan et al 2018, Zhu et al 2018, Zhang et al 2019)
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