Bbdd ?

[Piratebears]

Ok,
I have a grey girl from a black Mum and black Dad.There were 2 black,2 brown and one grey in her litter
Mum's Mum was Grey,so the Dam must be BbDd ( as she produced brown puppies too)
So,does that make my bitch Bbdd?
If she were bred with an all black male,chances are he would not carry the dilute gene and all puppies would be black,am i right in thinking she could only throw a Cream if she were bred to a brown male with the dilute gene and that a cream is not possible if she were bred to a Black - even a BbDd black sire ?
* please note,I am not breeding - just very interested in genetics !

 

[Ivoryudx]

Keep in mind for any recessives to show up, they must be present on both sides.

So with that in mind your girl could potentially throw a cream IF she inherited the brown recessive gene and the male carried the brown and the dilute gene. Which could be a brown dog with the dilute gene or a black dog with the dilute and cream recessives(like her dad).

If she were bred with a male who was pure for black in his lineage, not just visual color, they would all be black puppies because black being dominant.

 

[Piratebears]

Ok,so there would be no way to breed her to a black with brown recessive without risking a cream ?

 

[Ivoryudx]

If there is no dilute (grey/cream) in the lineage of the dog breed to, then there is no risk for cream as it would have to be on both sides to be expressed. The dilute gene is the recessive that makes brown a cream and black a grey. Of course this is only IF, she carries the brown gene recessive (she may or may not).

Your breeder had a risk of getting creams with the breeding that produced your puppy, since browns and a grey were both produced in the same litter.

Clear as mud?

 

[Piratebears]

Ahh,I thought that my girl would be carrying the recessive brown gene as she had a brown litter mate,may this not be the case ? could she possibly come from a black mother,with recessive brown and a dilute gene,bred to a black male who also had recessive brown and the dilute gene,who produced a black,brown and grey litter - yet my girl still might not have brown recessive?
Its such a facinating subject,I spend ages trying to guess the genetics of newfys i know . . . I'm more than often wrong!

 

[Ivoryudx]

You are correct. Even though your girls parents were both recessive for brown, and bred together producing some brown puppies who are littermates to your grey girl, it does not mean that your girl is automatically recessive for brown. She might be, but in a litter with recessives, normally 25% of the litter won't have all the recessives. Thats why they can be difficult to predict when you get so many different recessives that can effect one another involved.

The following link has a very good example how this works:

http://www34.brinkster.com/jeanidamyrishi/eng_brown.htm

 

[Bonapart White Black]

Is possible to make DNA test on carrying recessive colors? And how much it reliable?

 

[Sun Valley]

Hi,

Gray and brown recessives can be found via DNA. Not sure how reliable it is.

http://www.healthgene.com/canine/C128_newfoundland.asp

Lou Ann

 

[Bonapart White Black]

Thanks!
If it really, owner can make this test, and he will be assured about recessive genes his dogs. I correctly understand?

Next question:

Are american breeders consider it necessary? Some russian breeders say, that it is not necessary, and outside standart colors do not mention it.

 

[Piratebears]

Hi all.
This was posted ages ago - I now know that my girl does carry brown as she has been DNA tested.