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Genetic Variation and Population Differentiation in Natural Populations of Cryptomeria japonica
Author(s) -
TOMARU NOBUHIRO,
TSUMURA YOSHIHIKO,
OHBA KIHACHIRO
Publication year - 1994
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/j.1442-1984.1994.tb00101.x
Subject(s) - cryptomeria , japonica , biology , gene flow , genetic diversity , genetic variation , ecology , population , temperate climate , evolutionary biology , botany , gene , genetics , demography , sociology
Abstract Sugi ( Cryptomeria japonica D. Don) is a valuable tree species in Japan. The present natural distribution is limited to small scattered areas in temperate moist regions, and most of these areas are surrounded by vast artificial plantations. We studied natural populations of C. japonica in an effort to determine the amount and distribution of genetic diversity using 12 allozyme markers. The amount of genetic variation within the species is high ( H T =0.196) but most is found within populations with little among populations ( G ST =0.034) despite their isolated distribution. This pattern of genetic diversity is inferred to be the consequence of the following: (1) the distribution of this species in the past was wider and more continuous than it is now; (2) a high rate of gene flow occurs, perhaps including gene flow between natural populations and plantations; and (3) the long lifespan. However, the distribution of allele frequencies at the 6Pg‐1 in northern populations on the side near the Sea of Japan is clearly different from those in other populations. This observation is inferred to result from founding events.