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]WordNet (r) 3.0 (2006):
biotype n 1: organisms sharing a specified genotype or the genotype (or peculiarities) so shared