Page 23 - MWC 09-9-2021s

Improving the Accuracy of Selection The Midwest Cattleman · September 9, 2021 · P23

By Mark Z. Johnson potential herd sires to use or By working with your breed where the polled allele is
sell. These decisions impact association to order the tests, dominant to the horned allele
These thoughts are for marketing success, how we submitting DNA samples means that polled cattle can
registered, seedstock breed- will utilize feed resources and obtaining the lab results, be either homozygous polled
ers in the purebred sector of and the accuracy of these se- current DNA testing technol- or heterozygous polled. If our
cow-calf production. As we lection decisions dramatical- ogy can: 1) verify parentage, breeding objectives include
approach the time of year ly impacts how much long- 2) determine genotypes for producing polled calves, par-
that spring calving opera- term genetic improvement simply inherited, qualitative ents with the homozygous
tions will be weaning, selec- we will make. With this in traits, and 3) identify genes polled genotype will sire/
tion decisions will be made mind, using available DNA having an additive genet- produce nothing but polled
regarding how many heifers testing technology can cost ic effect on the variation of calves. Traits like coat color
should be developed as re- effectively accelerate reach- quantitative, polygenic traits and most of the identified ge-
placements, for marketing ing our breeding goals. which result in higher accu- netic defects are also simply
or culled. Likewise, which What can we learn from racy, Genomically Enhanced inherited.
bulls should be developed as DNA testing? Expected Progeny Differenc- GE-EPDs increase the ac-
es (GE-EPDs). This infor- curacy of selection for traits
mation is typically available influenced by the thousands
within a few weeks of when of genes. This would include
DNA samples are submitted traits like calving ease, wean-
yielding genetic information ing and yearling weights,
that would otherwise take carcass traits and maternal
generations of calf crops to performance.
obtain. Breeders should contact
Determining genotypes for their breed association for
qualitative, simply inherited information and proper pro-
traits, when dominant/reces- cedures for submitting DNA
sive gene action is occurring samples. DNA samples can
at a locus, can identify homo- be submitted in the form of
zygous or “carrier” genotypes blood (in purple topped tube
of animals with the same or on a DNA card), tissue
phenotype. For example, samples from an ear notch,
the horned/polled phenotype
continued on page 25
Genetically Yours

Saturday, Oct. 2, 2021aturday, Oct. 2, 2021
S
1
11 a.m. • Springfield, Mo.1 a.m. • Springfield, Mo.
Sale Location: William H Darr 20 Service age bulls
Sale Location: William H Darr
20 Service age bulls
Agriculture Center, Springfield, MO 11 Spring herd bull Prospects
Agriculture Center, Springfield, MO
11 Spring herd bull Prospects
29 Spring Heifer calf pairs
29 Spring Heifer calf pairs
20 Fall calving cows
20 Fall calving cows
19 bred heifers
19 bred heifers
12 Commercial bred heifers
12 Commercial bred heifers
WE ARE ON
LJR MSU
LJR MSU BW 1.2 M&G 47
VALERIE 16D YW 76 REA 0.054
VALERIE 16D WW
FAT
47
THE WEB! daughter of CMF CS U408 MM 23 MARB 0.22 LJR MSU BW 0.3 M&G 54

A stout, easy doing
0.17
PROGRESSION Y449. An
outcross pedigree for

most operations.
LJR MSU

LADY IDEAL
LADY IDEAL
REA
YW
84
0.37
134D
134D WW 55 FAT 0.074
MM
MARB 0.14
26
A super productive daughter of GV CMR IDEAL 424
X2096. Her dam is a Dam of Distinction.
See this catalog online at www.reedent.com
Sale Managed by:
Jim and Linda Reed • P.O. Box 126
BW 1.9 M&G 53 Green Ridge, MO 65332
660-527-3507 • Fax 660-527-3379
L WW 54 FAT 0.034 reedent@iland.net • www.reedent.com
LJR MSUJR MSU
973E HERTZOG
973E HERTZOG YW 83 REA 0.40
80H MM 26 MARB 0.10 BID ONLINE @
80H
midwestcattleman.com
Midwest’s Top Maternal
Program 40 Years Auctioneer: Eddie Burks
Continuously Breeding
Quality Performance A G R I C U L T U R E
Polled Herefords