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There is no question that when it comes to understanding what cows will transmit and what cows will not, it is an enigma wrapped in a conundrum.  There is much that we don’t know and some would argue it is not meant to be known.  The problem is, for those of us with a passion for breeding great dairy cattle, we want to know it all.  For that I turn to the three greatest genetic geniuses in the history of the world, Darwin, Mendel and Hunt (No they are not a law firm).

Charles Robert Darwin He established that all species of life have descended over time from common ancestors, and proposed the scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.

Charles Darwin

Ask anyone in the world to name a geneticist and the first name that comes to mind has to be Charles Darwin.  No better demonstration of Darwin’s theory of evolution exists in the world than in dairy cattle breeding.  While there is no question that artificial selection and selective breeding exist on a daily basis, a cow’s ability to reproduce and produce milk leads to a natural level of selection that epitomizes Darwin’s theory.  “The laws governing inheritance,” Darwin wrote, “are for the most part unknown.”  Moreover, while many modern geneticists have theories about the tendencies of the modern Holstein cow, their genetic transmission pathways in large part remain a mystery to this day.

Gregor Mendel

Gregor Mendel

Then along came Gregor Mendel who introduced the concept of “genes” to explain heritability.  Mendel changed the whole way we look at breeding when he introduced the theory that the chromosome is the carrier of genetic traits.  He also explained why a trait can disappear in one generation and reappear in the next and why these traits occur in a three-to-one ratio.  One of Mendel’s disciples, three quarters of a century later, was Thomas B. Macaulay.  Macaulay conducted his own studies, on his Mount Victoria Farms (Read more: Mount Victoria Farms – The art and science of great breeding).

Thomas Hunt Morgan

Thomas Hunt Morgan

Then along came Hunt. Well, more specifically, Thomas Hunt Morgan, but my ego wouldn’t let this go as my name is Andrew Morgan Hunt (Read more about my ego: I’m Sorry But I’ve Had Just About Enough Of… ).  In research that is now reproduced by grade 9 science students around the world, Morgan introduced the concept of X and Y-chromosomes.  Morgan concluded that a female has two X chromosomes and that males have both X and Y-chromosomes.  He also posited that the male of the species, because of the presence of the Y chromosome, transmits differently than the female.

To get a better understanding of this, let’s look at this from both sides of the story.

His side of the story (XY)

If you look at Holstein bulls throughout history you find four distinct patterns:

  1. Great daughters but no legacy sons
    These are the bulls that sired amazing brood cows but none of their sons were able to continue their genetic legacy.  Examples are Hanover-Hill Triple Threat, Carlin-M Ivanhoe Bell, and Braedale Goldwyn.  They all were able to sire brood cow daughters beyond compare, but no real sons to advance that genetic legacy.  Why did these sires seem to produce better on the female side than that of the male?  For that we need to turn to Morgan and his X and Y chromosome theory.  Since the Y chromosome is the only one that is inherited solely via the paternal  line, this leads  some geneticists to believe that it carries little genetic information, and as a result  a great sires genetic legacy rest more with his daughters than with his sons.  Therefore, with this first group of sires it is thought that much of their genetics were transmitted on the X chromosome rather than the Y.
  2. Great sons but not as many brood cows
    Bulls that sired outstanding sons but never produced a top daughter.  A couple of great examples of this are Montvic Rag Apple Sovereign, Maizefield Bellwood and O-Bee Manfred Justice.  All of these sires have left outstanding sons, but are not found as often in the maternal sire stack of the great sires.  There is no question as to their genetic contribution to the breed, but it was more as a sire of sons than their ability to leave an equal number of brood cows.
  3. Sons and daughters both extraordinary
    These are the sires that have gone down in history as the all-time greats.  Sires like Johanna Rag Apple Pabst, Governor of Carnation, Montvic Chieftain, Wisconsin Admiral Burke Lad, A.B.C. Reflection Sovereign, Round Oak Rag Apple Elevation, Pawnee Farm Alrinda Chief, Walkway Chief Mark, Hanoverhill Starbuck, Madawaska Aerostar and Maughlin Storm.  These are the bulls that not only displayed personal greatness but were also able to transmit both outstanding brood cows as well as legacy sons.
  4. Sons and daughters that were inferior
    Sons and daughters that are both below average.  These bulls left inferior daughters and as a result were never even given the chance to produce sons.  Bulls in this category are too numerous to mention and loads of their daughters go to the slaughterhouses every day.  No explanation necessary other than a lack of genetic merit and here enters the need for genomics (Read more: The Truth About Genomic Indexes – “Show Me” That They Work).

Her side the story (XX)

The female side of the story uses the same four distinct groups.

  1. Great daughters but no legacy sons
    These are cows with outstanding female descendants but undistinguished males.  Great examples of these are the cow families of Hanover Hill Papoose, Krull Broker Elegance and Plunshanski Chief Faith.  They all were able to leave outstanding female descendants generation after generation, but were never really able to accomplish the same feat on the male side of the story.
  2. Great sons but not as many brood cows
    These are the cows with potent transmitting sons, but daughters who didn’t outperform the average.  Examples of these are Wylamyna Tidy Kathleen (dam of Sir Bess Tidy and Sir Bess Ormsby Tidy Fobes) Lakefield Fobes Delight (dam of Lakefield Fond Hope, Lakefield Fond Delight Fobes and Carnation Royal Master) and Pawnee Farm Glenvue Beauty (dam of Pawnee Farm Arlinda Chief).  All of these cows had outstanding maternal lines but for some reason were just not able to transmit that legacy through their daughters.
  3. Sons and daughters both extraordinary
    Among the females in this category are Glenridge Citation Roxy, Mil-R-Mor Roxette, Comestar Laurie Sheik, Braedale Gypsy Grand and Snow-N Denises Dellia.
  4. Sons and daughters that were inferior
    Cows who, in terms of influence, failed to produce anything worthwhile.  Blame it on lack of genetics, bad breeding, improper management, or just bad luck, these cows just didn’t influence the breed. We have all seen examples.

The Bullvine Bottom Line

There has never been a clear explanation of why some bloodlines seem to transmit better through maternal lines, others through the paternal, and still others do well in both.  Even genomics does not answer this.  There are high genomic animals that still have these same tendencies.  Maybe if we could genomic test the genes on each chromosome we might find the answers?  Until then Genetic Transmission in the Holstein Cow will remain a mystery.

To read more about this get a copy of The Holstein History by Edward Morwick and read the chapter on Inheritance Patterns.

The Dairy Breeders No BS Guide to Genomics


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REGANCREST-PR BARBIE is often referred to as the premier brood cow in the Holstein world for type. Barbie and three of her daughters have all topped the USA Cow PTAT list. As a result, many descendants have brought high prices at public auction and in private treaty sales. Barbie spent her entire career under the ownership of her breeder, Regancrest Holsteins in Iowa, but her descendants have traveled the world.



Her Pedigree is an Alignment of Stars

Born in 2001, Barbie brought together the two main cow families at Regancrest. Her sire Durham, EX90 and Gold Metal, was known for siring udders and show cows. He was the very best son of the great SNOW-N DENISES DELLIA EX-95-2E-USA GMD DOM 5* that Regancrest also brought to fame. On her dam’s side, Barbie is the eighth generation of Regancrest breeding, which started from the Regan purchased cow ZUBES ORMSBY FAYNE EX90. Barbie’s dam, REGANCREST JUROR BRINA, like Barbie scored EX92 and earned GMD status. In fact Barbie was the fifth generation of Excellents with the Regancrest prefix. Her sire stack is Durham x Juror x Aerostar x Chief Mark x Board Chairman. All well-known and well-respected sires.

Barbie’s dam, Brina, EX92 and GMD, made records to 15,772 kg milk 3.6%F and 3.0%P at 4yrs of age.  As well, Brina had eight other Durham daughters including Bliss VG89 (2yrs), Bianca EX92 3E and Bunny EX93, who crossed extremely well with Goldwyn.

Walkway Chief Mark appears three times in Barbie’s pedigree. Her third dam, REGANCREST MARK CHAIRMAN BEA EX-91-2E-USA GMD DOM, was sired by Chief Mark; her sire’s dam (Dellia) was Chief Mark’s very best daughter; and the dam of her maternal grandsire (Juror) was sired by Chief Mark.  With that much Chief Mark influence, it is relatively easy to see where her width, depth of rear rib, smoothly blending fore udder and boxcar rump came from.

Barbie Shone in Milking Form

Barbie calved at 2-06 and produced (305D) 12,120 kg milk 3.9%F 3.0%P and classified high VG. In 2004 she was nominated All-American Jr 3 Year Old after being Intermediate and Reserve Grand at Minnesota State Fair and 5th at World Dairy Expo. She was raised in score to Ex92 after calving for a second time. In 2010 Global Cow of the Year Competition Barbie was nominated, was the Readers Choice and placed second. Barbie was #1 PTAT Cow. Her indexes were CTPI 2178 and PTAP 4.50. Her star shone brightly.

Barbie’s Progeny Excelled

REGANCREST G BROCADE EX-92-4YR-USA DOM - daughter of Barbie

REGANCREST G BROCADE EX-92-4YR-USA DOM – daughter of Barbie

When looking at Barbie’s progeny, it is not about the performance of Barbie’s more than 27 daughters it is about how many to feature. Shottle followed closely by Goldwyn were her best mates. All but one of her daughters have classified VG in their first lactations. By 2010 she had an unheard of 8 EX and 19 VG daughters. Three of her daughters have held the number one Cow PTAT position and at least eleven have made it to the top twenty-five PTAT Cow ranking.

Barbie’s Dolls Consistently Excel

REGANCREST G BRIZELDA EX-90-4YR-USA DOM - daughter of Barbie

REGANCREST G BRIZELDA EX-90-4YR-USA DOM – daughter of Barbie

REGANCREST G BEDAZZLE EX-91-5YR-USA DOM (Goldwyn) was the first Barbie daughter to be #1 PTAT Cow and was sold to Seimers Holsteins. REGANCREST CINDERELLA EX-92-2E-USA DOM GMD 4* (Champion) is the dam of many top daughters including REGANCREST S CHASSITY  EX-92-4YR-USA DOM the dam of numerous high genomic sons (Chassity is also a Golden Dam Nominee, she will be reported on soon in the Bullvine).  Chassity and her 14 offspring sold for $1.5. REGANCREST BREYA VG-88-3YR-USA DOM 1* (Shottle) was a former #1 PTAT Cow.  REGANCREST G BROCADE EX-92-4YR-USA DOM (Goldwyn), another former #1 PTAT Cow, sold with offspring for $900,000. REGANCREST BARBARA EX-92-4YR-USA DOM GMD (Shottle) made it to #31 CTPI Cow and was first 2yr old and Reserve Intermediate Champion at Iowa State Fair. REGANCREST G BRIZELDA EX-90-4YR-USA DOM (Goldwyn) produced 4-04 (305D) 14,864 kg milk 4.0F 3.4P.  REGANCREST MAC BIKAS VG-87-2YR-USA is the dam of the high genomic type sire MR ATWOOD BROKAW (Read- 7 Sires to Use In Order To Breed the Next World Dairy Expo Champion). Following on from these and other Barbie daughters there are numerous granddaughters that have topped lists and topped sales.

REGANCREST MAC BIKAS VG-87-2YR-USA - daughter of Barbie

REGANCREST MAC BIKAS VG-87-2YR-USA – daughter of Barbie

Barbie’s Sons Line Up Well Too

Five Barbie sons were proven in AI. REGANCREST S BRAXTON EX-95-5YR-USA (Shottle) was returned to active service by Select Sires based on his above average milk yield and superior type (PTAT 3.57) proofs. Baltimor (Shottle), Birk (Toystory) and Bonzai (Dundee) were all proven in Canada and all achieved Superior Type proofs. Mr Blackjack (Dundee) achieved PTAT 2.12 in the USA. There are many grandsons, great grandsons and great great grandsons now being used widely based on their genomic indexes. These sons make another long list of stars for Barbie, which includes Bradnick, Branson, Brokow, Cameron, Carson, Cashcoin, Cashmoney, Circuit, Colt 45, and Gold Chip.

Barbie Breeds True for Type.  She is the Holstein Breed Icon.

High rankings for PTAT are something Barbie and her descendants achieve with ease. With many grand and great granddaughters and grandsons are now receiving high genomic indexes for type, production and functional traits, it appears that Barbie’s legacy of great udders, excellent dairy strength, high classification scores and global demand will continue.

Do you think Barbie deserves to win our 2012 Golden Dam Contest?  Let us know. Your vote counts.



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