R help - Sep 2011 - Extracting BLUPs!

Dear R experts,

Suppose I have an data frame likes this:

   SampleID          grain       husk        fill
   1     KB001 0.076350637 0.28662970 1.45790428
   2     KB001 0.118940999 0.22795690 2.94869785
   3     KB001 0.150254385 0.56241033 1.09677303
   4     KB002 0.188315675 0.21455241 0.96852151
   5     KB002 0.180792658 0.23970933 0.97539467
   6     KB002 0.180792658 0.23970933 0.97539467
Is there anyway to extract the best linear unbiased predictions (BLUPs) values?

Thanks!

Regards,

KB