A quastion about the Buff Colombian genetics.

[Akrnaf2]

Silver looks white. By BPR, do you mean Barred Plymouth Rock? Those are extended black with the barring gene applying white bands across the bird. You can't actually see their silver base color. Barring has no restricting effects on black. It is a modifier gene, that will express, regardless of other genetics.
This cockerel, for example has red/gold base color and a single copy of barring, with the Columbian restrictor limiting where his black patterning can express. Notice how the barring gene expresses, applying white bands over the red/gold base color.
View attachment 1122468

You are confusing silver with white. White is caused by modifier genes.
Recessive and dominant white are different genes entirely, and have no effect on base color. They only affect black. A bird can't be recessive white AND have black hackles and tail. If you see white with black patterning, you've got Silver, not white. A breed that illustrates the effects of dominant white really well is the Cornish. Dark Cornish are red/gold based, with black lacing. Red Laced White Cornish are the same genetically, but have dominant white modifying all the black pigment.

Thanks very much!
Do you have any recommend good online source/sources for learning the plumage genetics?
I must say that it is interesting me very much, I have a M.Sc
In Zoology and I am quite familiar to rhinoceros, but this chicken puzzles me tremendously!

 

[junebuggena]

http://kippenjungle.nl/basisEN.htm

 

[Akrnaf2]

http://kippenjungle.nl/basisEN.htm

Thanks, but have read it...

 

[junebuggena]

Thanks, but have read it...

It covers basically everything. And breaks it down in understandable chunks.
Remember, all chickens are either silver or red/gold. And all chickens have the genes for black. It's not a one or the other. Very few genes can alter red/gold/silver. The vast majority of color genes affect black, where it's distributed across a bird, how it's distributed in the individual feathers, and it's intensity. A solid black bird isn't missing the genes for ground color. And a solid white bird isn't missing the genes for black.
This goes a bit more in depth, including leg color, eye color, and shell genetics.
http://kippenjungle.nl/sellers/page0.html

 

[3riverschick]

You need the book," the genetics of chicken colours- the basics". by Sigrid Van Dort. It is a beginner's book on chicken plumage . Easy-to-Read but the real Jewel of this book is the back half of the book which is a color Encyclopedia of chicken colors captioned by their genetic formulas.
Http://www.chickencolours.com
Sigrid has also written a more scientific book called ,'the genetics of chicken extremities "which covers the genetics of everything else but plumage .I believe you can buy them as a set at a discount from her .she has a very interesting site with a bunch of color genetics articles on it.
Then you would want to go ahead and read exremely scientific book by Professor Carefoot ,"Creative Poultry Breeding". Too scientific for me, but I'm sure you would find it fascinating. it's rare in the first edition. however has been reprinted in England. let me get you that website . you can buy it from her.
There is an also an excellent book out by Greg Brereton ,"21st century poultry breeding " Greg is an world renowned expert in Wyandotte plumage color. he explains a lot about it in the book which is transferable to other breeds.
Prof. Carefoot was one of his mentor's.
Karen
Poultry lit chaser.

 

[3riverschick]

Go to https://www.poultrykeeper.com look for the icon " Poultry Antiques by Veronica Mayhew". She reprinted and has the Carefoot book.
Karen

 

[3riverschick]

That's weird. it says I should be able to get to Mayhew's site from
poultrykeeper.com but I can't
so I guess you'll just have to stick "poultry antiques by Veronica Mayhew" in your search engine. That gets it done.
sorry about that ,
Karen

 

[gojira]

It covers basically everything. And breaks it down in understandable chunks.
Remember, all chickens are either silver or red/gold. And all chickens have the genes for black. It's not a one or the other. Very few genes can alter red/gold/silver. The vast majority of color genes affect black, where it's distributed across a bird, how it's distributed in the individual feathers, and it's intensity. A solid black bird isn't missing the genes for ground color. And a solid white bird isn't missing the genes for black.
This goes a bit more in depth, including leg color, eye color, and shell genetics.
http://kippenjungle.nl/sellers/page0.html

It does not cover all that much. That site is very basic at best. All chickens are either black or red/brown. Silver and gold are modifiers of red/brown. Those are covered in day one of a poultry genetics course. I would not say the vast majority of genes affect black. If you want help in genetics, you should ask questions. Keep researching. Just curious, are you a youth?

 

[gojira]

You need the book," the genetics of chicken colours- the basics". by Sigrid Van Dort. It is a beginner's book on chicken plumage . Easy-to-Read but the real Jewel of this book is the back half of the book which is a color Encyclopedia of chicken colors captioned by their genetic formulas.
Http://www.chickencolours.com
Sigrid has also written a more scientific book called ,'the genetics of chicken extremities "which covers the genetics of everything else but plumage .I believe you can buy them as a set at a discount from her .she has a very interesting site with a bunch of color genetics articles on it.
Then you would want to go ahead and read exremely scientific book by Professor Carefoot ,"Creative Poultry Breeding". Too scientific for me, but I'm sure you would find it fascinating. it's rare in the first edition. however has been reprinted in England. let me get you that website . you can buy it from her.
There is an also an excellent book out by Greg Brereton ,"21st century poultry breeding " Greg is an world renowned expert in Wyandotte plumage color. he explains a lot about it in the book which is transferable to other breeds.
Prof. Carefoot was one of his mentor's.
Karen
Poultry lit chaser.

I have not read the van Dort books, but my understanding is they are very basic, and only a starting point. I may break down and read them to critique them (I have done that with books on other subjects in the past). In place of the Carefoot book, I would recommend Hutt, Pearl, or Punett for qualitative genetics. I have not read the Carefoot book either, but i don't like the idea of a book being available from one person, especially when that one person is not even the author. I think you are being very generous calling Grant (I assume you meant Grant, not Greg) Brereton a world renowned expert. I have read his articles, and he uses terms out of context, etc. I am not sure he has much credibility among poultry geneticists.

 

[Akrnaf2]

It covers basically everything. And breaks it down in understandable chunks.
Remember, all chickens are either silver or red/gold. And all chickens have the genes for black. It's not a one or the other. Very few genes can alter red/gold/silver. The vast majority of color genes affect black, where it's distributed across a bird, how it's distributed in the individual feathers, and it's intensity. A solid black bird isn't missing the genes for ground color. And a solid white bird isn't missing the genes for black.
This goes a bit more in depth, including leg color, eye color, and shell genetics.
http://kippenjungle.nl/sellers/page0.html

You need the book," the genetics of chicken colours- the basics". by Sigrid Van Dort. It is a beginner's book on chicken plumage . Easy-to-Read but the real Jewel of this book is the back half of the book which is a color Encyclopedia of chicken colors captioned by their genetic formulas.
Http://www.chickencolours.com
Sigrid has also written a more scientific book called ,'the genetics of chicken extremities "which covers the genetics of everything else but plumage .I believe you can buy them as a set at a discount from her .she has a very interesting site with a bunch of color genetics articles on it.
Then you would want to go ahead and read exremely scientific book by Professor Carefoot ,"Creative Poultry Breeding". Too scientific for me, but I'm sure you would find it fascinating. it's rare in the first edition. however has been reprinted in England. let me get you that website . you can buy it from her.
There is an also an excellent book out by Greg Brereton ,"21st century poultry breeding " Greg is an world renowned expert in Wyandotte plumage color. he explains a lot about it in the book which is transferable to other breeds.
Prof. Carefoot was one of his mentor's.
Karen
Poultry lit chaser.

I have not read the van Dort books, but my understanding is they are very basic, and only a starting point. I may break down and read them to critique them (I have done that with books on other subjects in the past). In place of the Carefoot book, I would recommend Hutt, Pearl, or Punett for qualitative genetics. I have not read the Carefoot book either, but i don't like the idea of a book being available from one person, especially when that one person is not even the author. I think you are being very generous calling Grant (I assume you meant Grant, not Greg) Brereton a world renowned expert. I have read his articles, and he uses terms out of context, etc. I am not sure he has much credibility among poultry geneticists.

I want to thank you all, I certainly will check them.
The book of Van Dort, it is to expensive to me they want almost 100 euros for it! I