From John Potter

[Olga]

The first contains a table that shows Dexter traits according to chromosome number. Please notice that the PHA locus and the A2 beta-casein locus are both on chromosome 6. I do not know how close the loci are to each other, and my herd data aren't conclusive in terms of indicating a close linkage. However, it is a fact that the A1 allele occurs in Dexters that are not descendants of Woodmagic Wheatear.

The second contains a table that shows the A2 beta-casein genotypes of animals that I have owned and/or bred. The animals are listed according to their ADCA registration numbers.

The third contains a summary table of the 85 animals in the 2nd PDF. Just for the sake of curiosity I have sorted the genotypes according to polled/horned, color, PHA, and Chondrodysplasia (which hasn't occurred in my herd for about 8 years). Please remember that only PHA & A2 beta-casein are on the same chromosome, so there is no question or possibility of linkage between polled/horned and A2 beta-casein, color and A2 beta-casein, and Chondrodysplasia and A2 beta-casein.

You are welcome to share this information with anyone you wish, and you are welcome to post any of this information on the Dexter chat boards provided each table is posted without alteration of its contents. PDF #3 must not be posted without PDF #1.

John

www.scribd.com/full/44652687?access_key=key-27o55c69cushmmj3o1vf

www.scribd.com/full/44652696?access_key=key-1bg81yu1lxwfuvxowwnq

www.scribd.com/full/44652691?access_key=key-2mopc2rnxvlbha8z04f4

[Star Creek Dexters]

Thanks for posting Olga! Very intersting!

[littlecowfl]

When I get the money together, I'd like to test some of our calves from Muddy River Randy to see what they are.

[judy]

<<When I get the money together, I'd like to test some of our calves from Muddy River Randy to see what they are.<<<

A, this is a good example of why a central database of results can be so beneficial.

The dam of Randy was born in my herd. Both of Bevin's parents are confirmed A2 so Bevin was "obligate" A2. No need to test her as the only genes that could pass to her are A2 and that is what she will pass to her son, Randy. So Randy is automatically A2 from his dam. The sire, Stillwater Ryder is also in the Legacy database but not tested for A2. However, if you look for results on his calves you may be able to determine the A2 status. Perhaps Gene has results from some of Stillwater's calves that the two of you can use to figure out if Randy is A2/A2.

Then, you look for results from the herds that are connected to your dams.

As more animals are tested and the results shared it will save testing fees for lots of folks.

Judy