biotype

from WordNet (r) 3.0 (2006)

biotype
    n 1: organisms sharing a specified genotype or the genotype (or
         peculiarities) so shared

from The Collaborative International Dictionary of English v.0.48

biotype \biotype\ n.
   1. a group of organisms sharing the same genotype.
      [WordNet 1.5]

   2. the genotype shared by a {biotype[1]}.
      [PJC]