Don't worry about preserving Chocolate. It is theoretically impossible to totally clean a recessive from a breed the size of the Cavalier. You can greatly lower the incidence, but unless you lower the worldwide gene pool to the size of the cheetah's, it isn't possible to totally remove a recessive gene that has been in the breed from it's foundation. In our case, the gene had hidden for many generations prior and only popped out because I did a close breeding to check for genetic defects--- I got quite a surprise. Had to search through my old Cavalier books to find out about the color after it surfaced. The possibilities of getting a Chocolate in a litter from two carriers is 2 in 16. Not high odds when you consider the average litter size is 4.
You won't find any Blacks or Black & Whites unless there is a rare mutation because these are due to a dominant 'A' gene. It isn't a recessive so it can't hide. There was an English lady who still bred them after they were disallowed, but the last I heard of was in the 1960s. I have never heard of an albino, but there was a Cavalier who had so many white modifying genes that she only had some color on one ear and was called Ttiweh Snow White. That's the closest to an all white that I know of. There could be an albino; however, it would be a mutation. The reason that I have bred wholecolors to parti's in the past is not to enrich the red, but to add more broken color to the back. We were getting too many open marked dogs so I followed the advice of Betty Manger and bred to a BT. It did make a marked difference in the amount of color on the backs of our parti's when a wholecolor that was a carrier for parti was bred to a parti. I didn't believe Betty when she first suggested it years ago, but tried it in desperation about 10 years ago and it worked beautifully. All the best, Susan Cochran ----- Original Message ----- From: "Chris Arden" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, August 26, 2002 7:31 PM Subject: Re: [CKCS-L] Color Genetics follow up questions > First of all thanks again Laura Trunk and Susan Cochran for all the > valuable information, the time you must have spent writing it all out > and .... for letting me dream of one day finding a Chocolate Tricolour > Cavalier :-) > > If it's not too much to ask I have a few questions: > > You've given all the possible colour breeding combinations / results but > most breeders seem to mix either Tris & Blenheims or B+Ts & Rubies. I > understand that keeps things simple and helps avoid problems like white > fur on B&Ts ... but are there situations where a breeder would > deliberately cross a Tri with a Ruby or a B&T with a Blenheim for example? > > I've not yet managed to get a copy of Dr Frederick Hutt's book that you > recommend: in the meantime are there any url's you'd recommend for > further reading, particularly concerning the full set of gene pairs > involved rather than just the black/red which is what one sees mostly > and which Susan explained was a misleading simplification? > > You mentioned that there used to be Black & White and Black Cavaliers: > does anyone know where one can find photos of any? Someone told me that > there were also white cavaliers: is that just an "albino" aberration or > did they exist too? > > There are seed banks for storing fruit and vegetable breeds that might > otherwise become extinct and whose genes we may one day be glad we've > preserved .... could it make sense for someone to deliberately preserve > the chocolate cavalier for the same reason (for example I imagine that > along with eliminating the chocolate gene other genes might disapear too > which could be useful in fighting / providing immunity against a new > virus that might crop up one day ...). > > Chris Arden > Paris, France > > ========================================================= > "Magic Commands": > to stop receiving mail for awhile, click here and send the email: > mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL > to start it up gain click here: > mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL > > E-mail [EMAIL PROTECTED] for assistance. > Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html > > All e-mail sent through CKCS-L is Copyright 2002 by its original author. ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 2002 by its original author.
