Blue Butt

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BIOS
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Blue Butt

Postby BIOS » Mon Feb 25, 2008 10:40 pm

Can someone tell me when you cross a Pure York and a Pure Hamp what color will the pigs be? Will you get the whole litter blue butts, or is there a chance of a hamp looking pig, or a pure white one?
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Postby RingMaster » Tue Feb 26, 2008 1:43 am

Personally, have never seen a pure white hog out of crossing these two breeds. If I had to guess, expect 3/4 blue butts, usually get 1 or 2 hamp colored pigs out of a litter
I show purebreds...therefore I am of higher social status than you.

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Postby Piggy » Tue Feb 26, 2008 12:26 pm

If both breeds are pure you will NEVER get hamp colored pigs, white is dominate over black, some will be blue, most will be white, maybe some dark spots. good luck

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Postby BIOS » Tue Feb 26, 2008 1:17 pm

This is why I ask, some say one thing and others say something else.
We had a pure hamp that was bred to a pure york and she had 13 pigs, and four of them were hamp to black in color. The rest all white bodied with blue markings.
We were wondering which pig wasnt pure since we got so many black ones.
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Postby RobsShowHogs » Tue Feb 26, 2008 1:43 pm

The york is the one who wasn't pure. White is dominant over black, so if you ended up with black ones, the hamp was carrying that gene.
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Postby BIOS » Tue Feb 26, 2008 1:59 pm

We also AI'd a pure york gilt of ours to the same york boar and of course all white pigs, since white is dominant! Is that correct? or could there have been a blue dot somewhere? If indeed the York boar had a black carrier, then our york litter would all carry the black line, correct?
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Postby ter » Tue Feb 26, 2008 3:21 pm

BIOS: said
[quote:89c4b856be]If indeed the York boar had a black carrier, then our york litter would all carry the black line, correct?


No, this is not correct. I'll explain, Traits are controlled by genes, and genes have different forms which are known as alleles. For example; the gene for coat color can have two alleles. One white allele and one black allele. In higher organisms such as pigs there are two alleles on each chromosome pair. So, one of each of the above alleles (black, white) can be found on a chromosome pair. Meaning the animal can carry both the color black and the color white. An example of this would be your boar who carries both the gene for black and the gene for white.

Dominant genes mask or cover the presence of recessive genes. Capital letters are used to designate dominant genes. A recessive gene is one that is over ridden by a dominat gene. For a recessive trait to appear (phenotypically) the animal must be homozygous ( have two of the same gene- one on each chromosome) for that characteistic to appear.

If you bred a PURE york to your non pure york this is what you will see

Pure York: White: WW
Cross Boar: WB : white/black

W........ B
____________
l...WW...l...WB...l.... W
l______l_______l
l...WW...l...WB...l
l______l ______L....W

So you will have half the litter that will be carriers of the black gene and the other half will only carry the genotype for the color white. Also, to clarify, BOTH white and black are dominant traits. That is why you get blue butts in the first place, due to codominance or incomplete dominance which is a blending of traits which causes the color roan/ blue.