In broilers, studies with additional traits or in more deprived environmental conditions might reveal genetic trade-offs for ascites tolerance.
This suggests the possibility of further improvements in submergence tolerance by incorporating additional traits present in FR13A or other similar landraces.
Why the allele for non-shattering and not the non-shattering plants themselves was dispersed is an interesting puzzle, suggesting that early farmers were selecting for the non-shattering trait in combination with additional traits not found in the original non-shattering plants.
When we restricted these analyses to samples taken in the US (where data on human population trends were presumed to be more accurate), we found changes in two additional traits to be positively correlated with changes in human population density.
Tc1 mice display a number of these additional traits with deficits evident in a number of learning and memory paradigms (Morice et al. 2008; O'Doherty et al. 2005).
Prokaryotic plasmids have a dual importance in the microbial world: first they have a great impact on the metabolic functions of the host cell, providing additional traits that can be accumulated in the cell without altering the gene content of the bacterial chromosome.
Here, we broadly define an organism's life history as those traits that directly affect an individual's survival and production of offspring (see Fig. 2, Reznick et al. 2000) including classic traits such as fecundity and life span, and, in some cases, additional traits such as brain size and ornamentation (Badyaev and Qvarnström 2002; Sol 2009).
Our study illustrates the feasibility of using classic and cutting-edge genetic and genomic tools to target historically significant traits, a prelude to investigating additional traits (e.g., paedomorphosis and regeneration) that are best studied in the axolotl.
There can be many additional traits, but there are always a few that define the core of the entity in question.
As most compositional variation seen in mammalian mitochondrial genomes is due to variation in πc and πT (Gibson et al. 2005), we considered these two log-transformed variables as additional quantitative traits, to be analyzed along with LHT (i.e., as two additional quantitative traits in the model).
