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Genetic diversity and population structure of Raffaelea quercus‐mongolicae, a fungus associated with oak mortality in South Korea
Author(s) -
Kim M.S.,
Hohenlohe P. A.,
Kim K.H.,
Seo S.T.,
Klopfenstein N. B.
Publication year - 2016
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12263
Subject(s) - biology , genetic diversity , fungus , population , genetic structure , ambrosia beetle , botany , genetic variation , ecology , curculionidae , genetics , demography , gene , sociology
Summary Raffaelea quercus‐mongolicae is a fungus associated with oak wilt and deemed to cause extensive oak mortality in South Korea. Since the discovery of this fungus on a dead Mongolian oak ( Quercus mongolica ) in 2004, the mortality continued to spread southwards in South Korea. Despite continued expansion of the disease and associated significant impacts on forest ecosystems, information is lacking about the origin and genetic diversity of R . quercus‐mongolicae . Restriction‐site‐associated DNA ( RAD ) sequencing was used to assess genetic diversity and population structure among five populations (provinces) of R . quercus‐mongolicae in South Korea. In total, 179 single nucleotide polymorphisms ( SNP s) were identified among 2,639 RAD loci across the nuclear genome of the 54 R. quercus‐mongolicae isolates (0.0012 SNP s per bp), which displayed an overall low expected heterozygosity and no apparent population structure. The low genetic diversity and no apparent population structure among South Korean populations of this ambrosia beetle‐vectored fungus support the hypothesis that this fungus was introduced to South Korea.