Why do we need line breeding? What are its benefits? What are the dangers? Right from the first paragraph the article is in full swing using the analogy of building a brick wall to suggest that line breeding is effective when it is close, but a danger when it is too close:<\/p>\n
\u2018The most powerful instruments available to a breeder to book successful results are in-breeding and line-breeding. These allow him to connect bloodlines. You can see it as the mortar used for the construction of a house, and it makes that the stallions that are successively used in the creation of the individual are not stacked up like loose bricks. Too much mortar will result in concrete and unskillful bricklaying in bad quality. Balance is therefore the key word for the effective use of in-breeding and line-breeding. And when that balance is achieved, the relevant horse has a higher chance of developing into an exceptional showjumping horse. In breeding, such a horse has a better chance to make an indelible mark and to turn out to be a corner-stone.\u201d<\/p>\n
Line-breeding as Jac defines it, \u2018implies that one or more ancestors occur more than once in the pedigree of a horse and that the same ancestor occurs in the pedigree of both the sire and dam.\u2019<\/p>\n
And breeding with the same stallion on the top and bottom side of the pedigree, increases the chances of inheriting the valuable qualities of the stallion.<\/p>\n
\u201cWhat is the purpose of line-breeding? As soon as an ancestor is represented more than once in the pedigree of a horse, there is a higher chance that the autosomal chromosomes carry a higher percentage of DNA of the relevant ancestor. The object of line-breeding is twofold. One is to reinforce the same DNA of an ancestor in the new product, which increases the chances that the genes on the DNA will be expressed. The other is to unite as many different parts of the DNA of the relevant ancestor as possible. A sire and a dam each pass on fifty percent of their autosomal chromosomes to their product. It is therefore theoretically possible that an ancestor passes on two different halves of his autosomal chromosomes to two different offspring. When you unite these two different offspring, parts of the different halves of the DNA are united in the new product. This is important because the total of the DNA forms the basis for the various qualities of the relevant ancestor. The more different parts of this DNA are united in the new product, the higher the chances that it will have the same combination of qualities as the relevant ancestor.\u201d<\/p>\n
Jac notes that his researches into the pedigrees of the world\u2019s top 300 showjumpers, show that \u201899% of these horses have no line-breeding in the first two generations. From the third generation onwards we find ample line-breeding in the pedigrees of successful showjumping horses.\u2019<\/p>\n
Of course, since Jac is writing in the official journal of the Zangersheide Studbook, he cannot ignore the breeding philosophy of founding father, Leon Melchior. Initially, Melchior was the advocate of the outcross \u2013 using the French blood of Alm\u00e9 over the German blood of Ramiro and Gotthard, later, especially with the advent of Rex Z \u2013 who was the product of breeding full brother to full sister , Rebel I Z over Ratina Z, breeding close was the prevailing view. Jac is forced to admit that \u2018Rex Z was not an excellent international horse but, through excellent management, was started at international level a few times\u2019 – this is being kind, the horse placed four times in international events, best a 3rd<\/sup> in a \u2018mixed comp\u2019 at Mechelen – but he uses Rex creatively to illustrate his metaphor of the wall: \u201cFrom this it can be concluded that line-breeding in the first two generations rarely results in a successful showjumping horse. This is an example of the expression used in the intro, when \u2018mortar changes into concrete\u2019 because there are too few free generations that cause variation in the DNA. Nevertheless line-breeding in the first two generations can be very powerful when the relevant individual occurs in the pedigree in the previous generations. At that time there is often sufficient variation which allows the powerful concentration of genes, as in the example with the offspring of the stallion Rex Z.\u201d<\/p>\n Rex Z in action<\/em><\/p>\n Again Jac is being pretty kind about Rex as a sire. Despite having the very large broodmare band at Zangersheide at his disposal, his production was modest, just 18 of his progeny recorded international placings, with the two Jac points to, Roble Z and Regina Z, by far the most successful. Roble Z had a very modest career with Greek rider, Danai Tsatson, 63rd<\/sup> at the Athens Games, 40th<\/sup> at the Euros. Regina Z has been a good jumper for Harrie Smolders, her best a 10th<\/sup> in a World Cup qualifier at den Bosch. She might be an argument for the outcross model, being out of a Trotter mare, while Roble Z is key witness in Jac\u2019s argument for line breeding, since both Ramiro Z and the foundation mare, Heureka are mirrored on the stallion\u2019s pedigree \u2013 he is out of Cobra Z by Calypso I and out of Romanze Z by Ramiro out of Heureka. Jac argues that this line breeding on Ramiro and Heureka \u2018has made that the product can be better than the average of both parents.\u2019 Better than Rex Z is not exactly winning the lottery, but the principle of breeding top and bottom to really good stallions and mares looks fine.<\/p>\n \u201cA stallion passes his Y-chromosome exclusively on to his sons and his X-chromosomes exclusively to his daughters. This could explain why line-breeding on a stallion via a son and a daughter is exceptionally successful\u2026 I prefer line breeding from the fourth generation because this makes it possible to apply powerful line-breeding while preserving sufficient free generations that ensure variation of the DNA. At the same time line-breeding from the fourth generation ensures that the first three generations are free of line-breeding , which also ensures variation.\u201d<\/p>\n Jac draws attention to the master breeder, Federico Tesio \u2018the designer of the world famous stallion Nearco xx, whose pedigree can be called an exceptional example of balanced line-breeding.\u2019<\/p>\n Nearco – exceptional line breeding…<\/em><\/p>\n It is here that Jac draws attention to the mare, Pocahontas: \u201cin the back generations Tesio always purposefully applied as much line-breeding as possible on the mare Pocahontas xx (born 1837). We can consider her the most significant mare in bloodstock breeding and showjumping horse breeding. In total Nearco xx was line-bred 37 times on Pocahontas xx in the seventh to eleventh generation, via her sons Stockwell xx (22x), King Tom xx (7x) and Rataplan xx (5x), as well as her daughters Araucaria xx (1x), Ayancanora xx (1x) and Heroine of Lucknow xx (1x). Then the blood of Pocahontas was seventeen times introduced via Nearco\u2019s sire and twenty times via his dam.\u201d<\/p>\n Pocahontas, the great mare<\/em><\/p>\n Here I start to worry, I remember asking Jacob Melissen one time, is the Friesian part of the ancestry of the modern Dutch Warmblood, <\/em>and Jacob replying, just like you and I are related since we both come from Adam and Eve. <\/em>I tried looking at the pedigree of an Australian Thoroughbred stallion, Lappy. Only recently jumping breeder Antony March pointed out to me how successful Lappy had been in producing horses with jump \u2013 so does he fit Jac\u2019s model?<\/p>\n Lappy was a great grandson of the Irish Stallion, King of the Tudors, whose pedigree features some of the famous names that keep popping up on jumping pedigrees, in particular, Owen Tudor and Blue Peter.<\/p>\n When we go hunting Pocahontas on his pedigree, we find the same sort of results Jac Remijnse got. Running down the third line of King of the Tudor\u2019s pedigree we discover Hyperion (7 crosses of Pocahontas), then Mary Tudor (28 crosses), Sansovino (4), Lady Juror (11), Fairway (15), Fancy Free (19), Beresford (19) and Queen Scotia, 11. That\u2019s 114 crosses in just one eighth of Lappy\u2019s third generation. I am quite sure given the other seven in this line, that we would end up with about a thousand crosses. But does it mean anything other than at the time, with a much smaller population of Thoroughbreds, an exceptional mare like Pocahontas appears on almost all the successful Thoroughbred pedigrees, and would probably appear just as profusely on a few modern Thoroughbreds who are incapable of jumping a cavaletti?!<\/p>\n But let\u2019s try a few of Jac\u2019s theories with a stallion that while just \u2018good\u2019 as a performer, is a superstar as a sire – Kannan.<\/p>\n Kannan\u2019s sire, Voltaire doesn\u2019t exactly fit the model. On his sire line there is very little by way of line breeding on his pedigree until we get back to Adam and Eve territory. He is by Furioso II, with all the usual suspects on his pedigree: Precipitation, Bay Ronald, Son-in-Law and Orange Peel and I am willing to bet a couple of thousands of crosses of Pocahontas, but in the first six generations, not a single ancestor doubled up, let along doubled up top and bottom.<\/p>\n Voltaire is out of a Gotthard mare, Gogo M\u00f6eve, again there is not a lot of mirroring or doubling up, in fact no evidence of line breeding in six generations. However in his article, Jac draws attention to the influence of Pocahontas on Gotthard:<\/p>\n \u201cHannoverian breeding is, like Nearco xx, strongly influenced by the exceptional mare Pocahontas xx. This is first of all due to the foundation sires used at the end of the 19th<\/sup> century. Adeptus xx (born 1880) and Devil\u2019s Own (born 1887) go back in the male line to Stockwell xx; the dam of Goldschaum xx (born 1891) was line-bred on Pocahontas xx via Charmant xx, and King Tom xx; Kingdom (born 1879) goes back in the male line to King Tom xx; Colorado (born 1889) was line-bred on Pocahontas xx via Charmant xx, Rataplan xx and Knight of Mars xx; the grand-dam of Amateur I (born 1922) was line-bred on Pocahontas xx via Dreadnought xx and Kentucky xx.\u201d<\/p>\n Kingdom \u2013 Thoroughbred jumping ancestor<\/em><\/p>\n \u201cThe most significant stallion for passing on showjumping potential in Hanover is the Kingdom xx son, King. His blood was particularly distributed by Goldfisch II, who is the sire of Gotthard, amongst others.\u201d<\/p>\n Jac points out that two of the very successful modern Hanoverian stallions, For Pleasure and Stakkato, are both line-bred on Goldfisch II and Gotthard.<\/p>\n Gogo M\u00f6eve was in turn out of a mare by the exquisite Thoroughbred, More Magic. This is more promising: Phalaris on the top side, Phalaris on the bottom sire, and at least 36 crosses of Stockwell, and just on 20 by King Tom. On More Magic\u2019s top line, we find another mirror: Orby as a stallion sire and a dam sire, and yes, Orby\u2019s pedigree features Stockwell and King Tom.<\/p>\n![\"RexZ\"](\"http:\/\/www.horsemagazine.com\/thm\/wp-content\/uploads\/2015\/05\/RexZ.jpg\")
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