Comparative tissue typing was used to demonstrate the monofactorial inheritance of alloantigenicity in the solitary urochordate Styela plicata. Analysis of rejection patterns in reciprocal allografting matrices allowed the identification of a number of homozygous individuals. Selected homozygotes were then used as donors to define the histocompatibility genotypes of naive individuals. Using this method, five discrete tissue haplotypes were identified in the Balmoral Beach population of S. plicata. Such limited polymorphism of histocompatibility is inconsistent with polyfactorial inheritance. Moreover, analysis of genotype frequencies supported the hypothesis that alloantigenicity is encoded by a single genetic locus. These results support the existence of discretely encoded histocompatibility antigens in S. plicata.
|Number of pages||5|
|Journal||Journal of Heredity|
|Publication status||Published - Mar 1990|