25
01
2008

In recrÃa, Â you contributing more than the horse s horse? ...

Posted in Paso Fino by Romualdo

I have often found talking to some friends about the importance of the mares in the program recrÃa ... and although we know that each parent contributes half of the genes that will inherit the rack ... always conclude that â € OEDE any Manner € the Observing n tells us that the mare contributes more s ...

Today I want to present two excellent articles that will help us understand a little better na what happens at the genetic © tico when choosing a pimp to serve our mares ... both articles refer to race horses, but the concepts apply well to our horses Paso Fino ...

The X Factor:
± influence on the size or heart and the importance of husbandry in mares

Secretariat is considered by some as the best rider in the history of American hÃpica. This chestnut son of Bold Ruler n ³ born in 1970, earning ³ 16 of the 21 races he participates ³. It is one of 11 U.S. triplecoronados, winning the 3 year ± os Kentucky Derby, the Preakness and the Belmont Stakes. It was better two year ± os in 1972 and Horse of the Year ± o in 1972 and 73, in addition to champion s ³ n in Pasto that same year ± o. Was withdrawn by an injury ³ n and taken to foster high expectations for successful reproduction.

When he died ³ in 1989, diecisà © is year ± os after © s of having become champion ³ n, big revelation n was what was discovered ³ during his autopsy, poseÃa a heart of 9.988 kilos, offset by the 3.8 kilos on average has the thoroughbred race.

Before Secretariat, and Australians habÃan observed correlations is made between the size ± or the heart and the ability athletic © tica of horses ... the interesting thing is that geneticists have discovered that this ability is given by the â € œgen of heart Grandee € : The X Factor ... and that à © ste is transmitted through © s of the maternal line, for the Mitochondrial DNA ...

Mitochondrial DNA and its role in maternal inheritance

The discovery of mitochondrial DNA (mtDNA) has been one of the findings most relevant s occurred in the recent history of the genetic © tica. In the specific case of the industry of thoroughbred racing the discovery of the genes of mitochondrial origin has become important because of the influence that they seem to have on the transmittal of characters that is n intimately linked to the â € œperformanceâ € or capacity athletic © tica.

The coat, the shape and size ± or body, libido, earliness, speed, â € œstaminaâ €, character, etc., Are features whose presence or manifestations ³ n on a horse is n governed by The information contained in genes. These genes which will be n the pattern ³ n or mold for the formation n of a new being, come from the material Genetic © tico provided by the kernel of the cà © cells sex, ie à ³ vulo and sperm from the mother and father respectively, after joining at the time of fertilization and n ³ n give birth to a new individual. In short, both parents pass on to their offspring genes specifically to contribute to the appearance and virtues of the new being. However, the discovery of mtDNA involves the transmittal of a material Genetic © tico happens to the offspring without being subject to change and which is exclusively of maternal origin, indicating that part of the inheritance or certain characteristics of a living are merely the result of genetic influence maternal © tica.

N Special attention has been on the possibility that the information that contains the mtDNA ³ n governing the manifestations of certain characteristics related to athletic he served ± o © tico. However, these features do not appear to be of type physical training, ie mtDNA is not dependent on a horse has long legs, short neck, broad chest, which is not dappled sorrel. What has been raised is that the information n Genetic © tica contained in the mtDNA will determine Quà © so efficient is the cellular metabolism at the level of those body systems that are responsible for a good performance ± or athletic © tico. Some mares have been called mares than through the ability to broker their children, pass this information n Genetic © tica so intact to their children of both sexes and the same continue forwarded © NDOS from generation to generation through © s of his daughters.

Anyway â € € œinbreedingâ outstanding mares could enhance the effect or influence the maternal line broker has on the ability of their offspring through © s of information contained in the mtDNA.

Labriego For most, these articles are very important because they give us a tool on which to base decisions that so far we have made â € appropriations by observations ³ nâ €, based despite the debates regarding our instincts, but without a â € œrazà ³ n cientÃficaâ € hold on to ... I want to clarify that these studies this year No No No in paa ± ales and're still a long way to go, but at least show that we are on the right track ...

For example ... there is no doubt that Galana was an outstanding mare and its influence can be traced through © s of their offspring ... Galana, in turn, was the daughter of the Navy who also © n was a great player ... Labranza and à © sta, Battle daughter whom we recognize by their impact on our race, especially through his daughters' © s ...

These observations are the same that led me to buy SerranÃa ... Labriego is the pimp most s remarkable that our race has had in the past 25 year ± os ... when we see their pedigree tend to look at the line of Cialitos (Kofresà x Galantita) ... but when we studied more deeply s dominant see that the line was the line of Diorama ... from here that the crossing of Labriego Diorama was so effective in producing superior examples ...

Similarly, cross Labriego with SerranÃa (Calypso Jr x Diorama) was also a cross © n characterized Serrania to produce superior specimens ... Moreover, from here we understand why the intersection of â € œLabriego on Labriegoâ € â € "either inbreedings father / daughter or brother / sister â €" to consistently produce outstanding individuals ...

Not everything is â € œcolor rose € and have to be very Precaution ³ n consanguÃneos to make crosses to strengthen the maternal lines crossing a possible ... because in the same way that an accented and emphasize the characteristics Serenata de los Robles desirable ... also © n can be transmitted and reinforced the flaws ... for this race ³ n is necessary to study carefully the crosses ... confirming that the horses and mares that are listed in the register correspond with reality ... analyzing the characteristics of parents, grandparents, grandparents / as ...

This is Just to â € œabrirles the apetitoâ € ... both articles is n awesome and there is much that can be drawn from them ... well I invite you to read ... those can be accessed from this article, or from the section â € œArtÃculos permanentesâ € that appears in the column on the right ...

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