However, when two copies of the trait are present, by breeding two Rexes together, the coat is affected differently causing hairlessness, and earning the colloquial name, "Double-rex".
While breeding two distinct transgenic mouse lines together to visualize two distinct reporter genes in the same mouse is straightforward, adding a third variable, such as a genetic mutation, becomes dramatically more time consuming, and adding a fourth variable, such as a cre recombinase, often makes the experiment unrealistic to carry out.
To circumvent this problem, we generated conditional Pak2 KO mice by flanking exon 2 of Pak2 with loxP sites (Kosoff et al., 2013) and introduced, by breeding, two different Cre transgenes, Lck-Cre (Hennet et al., 1995) and Cd4-Cre (Lee et al., 2001), in which the Cre recombinase is expressed under the promoters of T cell-specific Lck or Cd4 genes.
Presumably, most causes of absolute resistance are genetically determined; it is possible, for example, to produce by selective breeding two strains of rabbits, one highly susceptible to tuberculosis, the other highly resistant.
In cotton breeding, two major male sterile systems are used to produce hybrid seeds, namely cytoplasmic male sterility (CMS) and genetic male sterility (GMS).
To make our study more practical and applicable to plant breeding, two cross-validation schemes were employed to achieve the above objectives by evaluating the accuracies of (CV1) predicting unobserved phenotypes of untested lines and (CV2) predicting unobserved phenotypes of lines that have been evaluated in some environments but not others.
Clay said that before 10 a.m. on Sunday he had received inquiries about breeding seven mares to Flower Alley.
The Mexican jay in the Chiricuahua Mountains in Arizona, for instance, is breeding ten days earlier than it was 30 years ago.
From the 1940s to the early 1990s Calumet dominated American racing for many seasons, breeding nine winners of the Kentucky Derby, and many other notable horses.
Renan a hybrid variety, which resulted from breeding four varieties, including the abovementioned Myronivska 808 and Roazon.
Of the seven traits whose phenotypic variance changed over the four decades of advanced cycle breeding, five showed a significant decrease.
