Hmm, you mean continuously varying traits, just like mutation, except two to three orders of magnitude greater?
		
		
	 
You have got to be trolling at this point, or maybe a very patient Poe? 
I do this for the readers, as I know that the Dunning-Kruger Effect rules your world -
continuous variation
See more synonyms on Thesaurus.com
noun Biology.
- variation in phenotypic traits such as body weight or height in which a series of types are distributed on a continuum rather than grouped into discrete categories.
How that is 'like mutation' is a mystery, known only to the feeble of mind, tunneled of vision, desperate of motivation.
AMER. ZOOL., 21:795-811 (1981)
Population Variation in Continuously Varying Traits
 as an Ecological Genetics Problem
P. R. GRANT AND T. D. PRICE
SYNOPSIS. The niche variation hypothesis is an adaptive explanation for variation within populations and for the differences in variation between populations in morphological, physiological or behavioral traits. It  has received  only  partial support  from  empirical  tests and has been criticized on theoretical grounds. 
 Recent  quantitative  genetic  models  have  made an advance by exploring the  effects  of  mutation,  migration,  mating  pattern  and selection on phenotypic variance. These models are reviewed and  their  most  important features are integrated in a new model. In this model population variation  is in a  state of balance between the opposing forces of mutation and immigration, which tend to elevate variation, and selection and possibly genetic drift tending to decrease it.  Populations  exhibiting  different  levels  of  variation  are  interpereted  as  having  different  equilibrium points, and it is the task of empirical studies to determine the relative magnitudes of the opposing factors. An example is given from studies  of  Darwin's  finches.  
Geospiza  fortis  varies more than G. scandens on Isla Daphne  Major,  Galapagos,  in  several  morphological traits including beak  and  body  size.  This  is explained,  assuming  equal  mutation  rates  in the two species, as the result of more frequent genetic input to  the  G. fortis  population,  through occasional hybridization with immigrant G. fuliginosa, and  relaxed  stabilizmg selection.  Stabilizing  selection  is less  intense  on  
G. fortis  than  on  
G. scandens  because the 
G. fortis population has a broader niche; there is both a within-phenotype and between phenotype component to the broad niche of 
G. fortis. The success of theory in explaining population variation is discussed, and it is concluded that empirical studies lag far behind theory.
And from the introduction:
"In this paper we will review the major
explanations for the maintenance of
 continuous
variation and for the fact that populations
differ in variation for a given trait.
Since 
we will be concerned solely with continuous
variation we will ignore sexual dimorphism,
a special type of population variation that may have relevance to our primary question..."
So to sum up - 
These are NOT NOT NOT "NEW" traits, as you seem to have to believe.  The introduction of alleles from one species into the hybrid group alter already-existing traits, it does NOT introduce new ones (in this study).
Get it NOW?