Wang XR, Szmidt AE, Lindgren D
Allozyme Differentiation among Populations of Pinus-Sylvestris (L) from Sweden and China
Hereditas: 1991 114:219-226
Allozyme differentiation al 14 loci was studied among 7 populations of Pinus sylvestris representing one geographic variety lapponica from Sweden and two varieties, mongolica and sylvestriformis, from China. The expected and observed heterozygosities were high and ranged between 0.165 and 0.282, and between 0.164 and 0.278 respectively. With the exception of the var. sylvestriformis, the patterns of genetic variation among populations were in accordance with the patterns of their geographic distribution. Nei's genetic diversity statistics showed that 7.5% of the total diversity was due to differences among varieties. Pronounced differences were found between the var. sylvestriformis population and the populations represent the other two varieties. On the other hand, less differentiation was found between the geographically very distant var. lapponica and var. mongolica. It appears that as a result of past events the patterns of differentiation among populations of P. sylvestris are more complex than previously thought. It is possible that the individual geographic varieties of this species have a different evolutionary history.
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