Coat colour is one of the most visible, and consequently most studied, genetic systems in horses [4].
In view of this, it is not surprising that most genetic evaluation systems use an additive model and ignore non-additive effects, especially considering that their aim is to estimate breeding values or additive genetic values.
The major histocompatibility complex (MHC) genes are one of the most important genetic systems in the vertebrate immune response.
Genes of major histocompatibility complex (MHC) form one of the most important genetic systems for infectious disease resistance in vertebrates [ 3].
Because H. volcanii has one of the most advanced genetic systems for any archaeon, the phenotypes reported here may promote the study of genetic and developmental processes in archaeal biofilms.
The histocompatibility leukocyte antigen (HLA) complex, located on chromosome 6p21, is the most polymorphic genetic system in mammals [ 11].
The Major Histocompatibility Complex (MHC), located on chromosome 6p21, is the most polymorphic genetic system in mammalians, and has been studied with regard to a wide variety of diseases of distinct etiology, including infectious diseases.
The MHC is the most polymorphic genetic system known in humans; it is divided into class I (HLA-A, HLA-B, and HLA-C) and class II (HLA-DRB1 and HLA-DQB1) molecules, whose function is to encode membrane glycoproteins that act as mediators in the presentation of antigenic peptides to lymphocytes T CD8+ and T CD4+, respectively, thereby triggering the immune response [ 13].
The major histocompatibility complex (MHC), also known as the human leukocyte antigen (HLA) complex, located on chromosome 6p21.3, is the most polymorphic genetic system in mammalians and has been studied with regard to a wide variety of diseases of distinct etiology.
However, given the number of genes involved in this process, strong affinities between Aquificae and a single group across all five complexes would support either vertical inheritance of most genetic components of this system, or extreme convergence of these groups due to many independent LGT events.
