Polled x Polled Breeding - follow me on my misadventures

helmstead

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Polled goats are great, mainly because they save us the fun of disbudding. There are many breeders who have a good deal of polled stock, and try to breed for this trait. We aren't one of those breeders, but we do have a couple polled does and a junior buck who's polled. They were purchased for other traits, and the polled gene was just a bonus.

The trouble with the polled gene is a little genetic fault that can pop up - hermaphrodites. You hear of it mostly due to breeding polled to polled. The research I've done shows a 1 in 4 chance of hermaphrodite offspring when you breed polled to polled.

So...to the story.

This spring I purchased a polled yearling doe I'd seen in last year's shows. She's a really nice girl, daughter of a PGCH buck with excellent dairy backgrounds on both sides. I got her home, did all the bolusing and deworming and fleshing up, and after a good month and a half, I put her in the pen with my boy, Chip. No fireworks. I thought, well, she'll start good strong cycles this fall...and moved on.

This is Susie Q:
CHWDFSusieQ.jpg


About 3 weeks ago, I noticed she had some tissue in her mammary area. At first, I chalked it up to the weight she was gaining. However, it kept growing. :/ I shot an email off to her breeder..."Out of curiosity, is there a chance this doe is bred?"

The answer, to my dismay, was, "Well Hocus was an escape artist here and broke into that pen (which also housed Hocus' dam, Rhiannon, whom I also purchased) several times."

:th

Hocus, whom I also bought just to see what he'd do in the ring, is Susie's paternal half brother...and is ALSO polled.
HocusPocus5111.jpg


LUCKILY I know he did NOT manage to breed his dam, she is now bred to my buck, Rider. Little Hocus is also expecting a litter from another yearling doe he covered back at the breeder's farm - luckily for her, that doe wasn't polled!

So, sometime later this month or in August, I'm expecting kid(s) from a polled x polled breeding AND a direct linebreeding on their sire. The linebreeding doesn't really bother me (at least it's a nice buck)...but I'll admit I'm worried about what comes out! I'll be doing vet exams for sexual orientation on doe kids to make sure there aren't any hidden testes...and just wethering any boys.
 

jodief100

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I spoke with Dr. Andries about polled to polled recently. He was at a goat sale where I had a polled doeling up for sale. He said the hermaphrodite gene is very close to the polled gene on the locus but is not on it, as is frequently believed. Horned goats can carry it even though they have no polled gene (polled is dominant). The hermaphrodite gene is a recessive gene. The goat needs to inherit the gene from both parents and yes polled goats have a higher instance of carrying the gene than horned ones due to the close proximilty. So while a polled goat is more likely than a horned goat to carry the gene, it is not always so.

The one in four chance is *IF* both the parents carry one copy of the hermaphrodite gene. If one does not, the chance is 0. What I got from the conversation is the odds of a polled-polled breeding producing a hermaphrodite goat is less than the frequently quoted 1:4.

It is not really quite that simple. There are a few other possibilities if you consider heterozygous vs. homozygous but those scenarios are unlikely in this instance so there is no need to discuss them here.

Good Luck! They are both wonderful looking goats.
 

aggieterpkatie

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I'm crossing my fingers you get some normal kids! It would be great if we could figure out a way to successfully breed polled goats.
 

helmstead

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Jodi - very interesting stuff.

Probably all will be A-OK and I'm fretting heavily over nothing...LOL I have had worse accidentally bred does (like a ND bred to a Boer buck...:rant ) but I'm still really anticipating what happens here.

The good news is her udder, as it fills, is looking pretty nice, as I had hoped it would.
 
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