Genetic variation in an isolated population of Hymenophyllum ...
Genetic variation in an isolated population of Hymenophyllum ...
Genetic variation in an isolated population of Hymenophyllum ...
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G. Coll<strong>in</strong>g & S. Herm<strong>an</strong>t <strong>Genetic</strong> <strong>variation</strong> <strong>in</strong> <strong>an</strong> <strong>isolated</strong> <strong>population</strong> <strong>of</strong> <strong>Hymenophyllum</strong> tunbrigense<br />
90<br />
Table 1: Summary <strong>of</strong> <strong>an</strong>alysis <strong>of</strong> molecular vari<strong>an</strong>ce (AMOVA). Pl<strong>an</strong>ts represented 3 sub<strong>population</strong>s <strong>of</strong><br />
<strong>Hymenophyllum</strong> tunbrigense. The <strong>an</strong>alysis is based on RAPD phenotypes consist<strong>in</strong>g <strong>of</strong> 24 b<strong>an</strong>d<br />
states. Levels <strong>of</strong> signifi c<strong>an</strong>ce are based on 1000 iteration steps.<br />
Level <strong>of</strong> <strong>variation</strong> df Vari<strong>an</strong>ce component<br />
RAPD <strong>variation</strong> <strong>of</strong> <strong>population</strong>s<br />
<strong>an</strong>d gene fl ow<br />
There was strong genetic diff erentiation (RAPD<br />
pa pa pa pa erns) erns) among sub<strong>population</strong>s (24% <strong>of</strong> total<br />
<strong>variation</strong>) (P (P < 0.001) (Tab. 1). The strong genetic<br />
<strong>variation</strong> among sub<strong>population</strong>s <strong>an</strong>d the me<strong>an</strong><br />
number <strong>of</strong> <strong>in</strong>dividuals exch<strong>an</strong>ged between<br />
sub<strong>population</strong>s per per generation generation (N<br />
(N = 0.78)<br />
em<br />
<strong>in</strong>dicates that that gene gene fl fl ow ow between between sub<strong>population</strong>s<br />
sub<strong>population</strong>s<br />
is low. The pairwise genetic dist<strong>an</strong>ces (Phi<br />
ST) were<br />
signifi c<strong>an</strong>t between all sub<strong>population</strong>s (P (P < < 0.001).<br />
0.001).<br />
UPGMA cluster <strong>an</strong>alysis based on Nei’s dist<strong>an</strong>ces<br />
between RAPD phenotypes clearly separated the<br />
three sub<strong>population</strong>s sub<strong>population</strong>s (Fig. (Fig. 4). 4). A A possible possible explaexpla-<br />
nation for for the the observed observed genetic genetic diff diff erentiation is is a<br />
restricted dispersal <strong>of</strong> the spores (Fig. 5).<br />
Conclusions<br />
Our results show that the three sub<strong>population</strong>s<br />
form<strong>in</strong>g together the largest Luxembourg<br />
Absolute % P<br />
Among sub<strong>population</strong>s 2 0.939 24.27
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