If you are breeding second generation or third generation chickens, be very wary of inbreeding issues.
To evaluate triM with a realistic pattern of marker information, the simulation was based on data from a three-generation chicken intercross (Kerje et al. 2003) where dense SNP genotypes were available for two families (Groenen et al. 2009).
Three generations of chicken.
To balance the offspring of the 8 F0 cocks in the next generation, 56 chickens from the F1 population, all with good health condition and similar body weight, were selected for further crossing.
A total of 400 chickens from three generation (including 367 F2 chickens from 20 full-sib families in five batches) were used.
These results supported and further corroborated our previous findings, showing that adaptive responses can be transmitted across generations in chickens by means of epigenetic mechanisms.
In this study, we show that FIRE is present in all amniote lineages examined to date and describe the generation of transgenic chicken reporter gene lines in which the chicken CSF1R promoter and FIRE enhancer sequences are linked to green or red fluorescent reporter proteins.
Our previous generation of recombinant chicken CSF1 [ 11] permitted the production of large numbers of pure BMDM from chicken bone marrow.
The generation time of chicken (approximately 2 years [ 36]) is shorter than that of extant Geospiza species (approximately 4.5-5.7 4.5-5.7ased on estimates from G. scandens and G. fortis[ 37, 38]).
Also, since each commercial product is produced from 4 parental lines, the total cost would have to be multiplied by a factor of 4. The generation interval for chickens is relatively short (one year).
While classic DNA-based Mendelian genetics supports the existence of August Weismann's theoretical barrier between the soma and the germline, and thus "Egg first" solutions only, in recent years discovery and characterization of epigenetic mechanisms that enable transmission of somatically acquired traits across generations may support "Chicken first" scenarios as well.
