Lav over B/B/S what do you get

[tberggren]

Anyone know what I end up with if I put a Lav Roo in with B/B/S hens?

 

[speckledhen]

Lav is a completely different gene than the blue gene. You may get some pretty birds, though mixed up.

 

[Sonoran Silkies]

In one copy (Lav,lav) there will be no affect. In two copies the birds will be somewhere between blue (or splash) and lavender. They should be lighter in colour, but the colouration pattern will be more like the blue or splash. With a black it will be changed to lavender.

 

[tberggren]

Quote:
So are you saying if I have a (Lav, lav) roo and he is breed to a blue or a Splash the offspring will most likely be blue and splash but maybe lighter in color??

And are you saying the this roo breed to a black hen will produce all lavender??

Don't mean to sound dumb, just trying to understand. ;o)

 

[speckledhen]

They should be lighter in colour, but the colouration pattern will be more like the blue or splash.

I think what Sonoran is referring to here is that with lavender, the bird is all one color, even the hackles and saddles. With blues, the hackles and saddles are darker. Hope I got that right! I'm not as up on the lavender gene as I am the blue gene.​

 

[Krys109uk]

Soneran means that breeding a lavender bird to B/B/S. The offspring will only inherit one lavender gene. Lavender is recessive so any offspring from the first cross will most probably act like mating a back coloured bird with B/B or S.
If, however, you mate the offspring back to their lavender father (or to each other) wherever the offspring inherits a lavender gene from each of its parents then it will show in various forms, depending upon which allele it inherits from B/B/S.

 

[tberggren]

Quote:
OK, I understand the above(well most of it, LOL), but what will the offspring of the first breeding of a lavender bird to B/B/S. look like?

 

[Krys109uk]

The first cross offspring would all be B/B or S (unless the females are carrying a single lavender gene, which they probably aren't).
The offspring would only be inheriting one lavender gene from the lavender male (& a non lavender gene from the female). Thus the lavender wouldn't show in the first cross.
You could expect the proportions to work out as if the lavender bird was a black bird. i.e. lav to black would give all black coloured offspring; lav to blue would give approx 50% each of blue & black coloured offspring & lav to splash would be expected to give all blue coloured offspring.....but all of the offspring would be carrying a lavender gene which is recessive & wouldn't show.

 

[tberggren]

Perfect!! That's exactly what I was wanting to know.
Thanks everyone for your help. I now think I understand the results of a first and second generation breeding. Yeah!

 

[Sonoran Silkies]

Yes, a bird who is Lav/lav Bl/Bl will look splash--there will be no sign that s/he carries a copy of lav. Ditto for Bl/bl and bl/bl.

A bird who is lav/lav Bl/Bl will look more like splash than like lavender, even though he or she is homozygous for lavender. Ditto for Bl/bl. I would expect that the amount of dilution would be more than if just from the blue gene.

http://web.archive.org/web/20071111220301/home.ezweb.com.au/~kazballea/belgians/genetics.htm has more complete information on birds who are both lavender & blue/splash.