Our results suggest that currently the number of genetically differentiated groups of purebred dogs might be even larger than the number of breeds: some breeds, such as the poodle, are likely to encompass multiple genetically divergent subgroups.
The accuracy of GBV was assessed in a group of purebred industry sires based on the correlation coefficient between GBV and accurate estimated breeding values based on progeny records.
In the group of purebred dogs, the percentage of CMSs was higher in large breeds (38.7%, n = 12), i.e. German Shepherds (n = 4) and Rottweilers (n = 2), and single CMS cases were noted in the following breeds: St. Bernard, Tosa Inu, Doberman Pinscher, Flat Coated Retriever, Labrador Retriever and German Shorthaired Pointer.
Among 16 genetic groups, with 4 purebred and 12 crossbred groups, the crossbred progenies of NN×CM and CM×WM produced the highest mean SRBC (10.59±0.53) and HC (6.37±0.20), respectively.
There are two main horse groups in Thailand: purebred and Thai native crossbred horses.
A study by Kachman et al. [ 15] pooled purebred animals into multi-breed groups to compare prediction in multi-breed versus single-breed populations for weaning and yearling weight.
The selection indexes for the purebred hens in single or group cages and the hens in the practical environment included 22 traits (Table 1).
For the next generation, this will result in a deficit in potential partners of the heterogametic sex, and that situation will have several consequences: i) it will free up some space in the niche that the purebred members of the saeptating group can then move into without competition.
Endless variations of this story are played out every day across the United States as the number of groups devoted to rescuing purebred dogs multiplies.
The world of dog painting collectors is "not a big universe, but a very widespread one," Mr. Secord said, adding that his 7,000 clients fall into three groups: breeders and exhibitors of purebreds, hunters, and pet owners.
