RSS

French cattle genetics

01 Oct

This is a new paper that may provide some insight into cattle genetics. However, while Zebuine breeds are widely sampled, European breeds other than French (and a handful of NW European, Swiss and Italian breeds) are not, what makes more difficult to make a comprehensive assessment.

Mathieu Gautier et al, Insights into the Genetic History of French Cattle from Dense SNP Data on 47 Worldwide Breeds. PLoS ONE 2010. Open access.

Unsupervised hierarchical clustering of the 1,121 individuals genotyped for 44,706 SNPs

 
Legend is found at supplementary table S1 (download).

It is interesting that even at K=47 some populations still do cluster, a sign of a very intense relatedness that in some cases may be obvious (Angus varieties, Holstein from Europe and America) but in others maybe not so much.

If we stop at K=5 or K=6 we can appreciate three basic groups in Europe (taurine breeds):

The orange cluster includes most French and Swiss breeds (partial exceptions found only in the NW) and even permeates somewhat into England (Hereford) and Norway. It also includes Italian and Moroccan breeds, even if these have something of zebu. The purest representative is the Blond d’Aquitaine.

Blond d’Aquitaine

Excepting the Brown Swiss, the homogeneity of the main part of this cluster is maintained still at K=10, clearly suggesting a common origin for southern and  eastern French cattle, including North Italian breeds

The yellow cluster has Holstein as only pure representative but makes up the largest part, or at least a sizable fraction, of NW European cattle, from the Loire to Norway. Next to Holstein in purity is Angus, a Scottish breed.

Holstein-Frisian cattle

At K=10, Angus and Hereford already display their unique personalities anyhow, suggestive of an early divergence, possibly within the British Neolithic, a relatively late phenomenon, while the other NW European breeds, continental, still look “hybrid” instead.

The small green cluster is restricted to the Jersey breed.

Jersey cattle

The non-European or zebuine components don’t show but a cline across Africa, with extremes in West Africa and India. Plus the distinct Lagune breed from Benin. This pattern remains pretty much the same at K=10.

The two rightmost breeds are modern North American taurine-zebuine hybrids. At K=10 it is apparent the dominance of Hereford and Angus components in each but at lower K levels they look identical. However at K=47 they appear as totally distinct clusters each on their own right, probably because of extreme inbreeding.

Back to European breeds, the authors speculate somewhat with a dual Mediterranean and Danubian Neolithic origins but the stop short of proclaiming any theory because they have to admit that their sampling is too limited for anything like that.

I must say that I know of no archaeological record of any cattle (Bos sp.) being associated with Mediterranean Neolithic (Cardium Pottery). This culture was specialized in fishing and ovicaprids, probably with some pigs too (and, of course, cereals, pulses and olives), not bovine cattle. But I’m not really sure how cattle was incorporated into these areas’ economy, what certainly happened by Chalcolithic times at least, when bulls become a popular artistic and maybe religious motif in south Iberia (competing with deer, sometimes up to the point of transforming an animal into the other).

What seems pretty apparent is that a Chassey-La Lagozza (proto-Ligurian?) Chalcolithic origin can be speculated for this cluster. A lot should depend on Balcanic, Central European and Iberian affinities or differences, not considered here, but I can already say that the Blond d’Aquitaine looks similar to the usual montane Basque types, such as the Betizu, though these are usually reddish in color and have somewhat larger and often characteristically-shaped horns.

Betizu, typical Basque cow
Advertisements
 

5 responses to “French cattle genetics

  1. Heraus

    October 2, 2010 at 10:18 am

    This comment has been removed by the author.

     
  2. Heraus

    October 2, 2010 at 10:22 am

    The Blonde d'Aquitaine is a modern creation that fused many aboriginal SW French cattles : the "Garonnaise" (from the Garonne valley), the "Quercy" (from modern Lot) and Pyrenean cattle which got nearly extinct because of the imposition of the Blonde d'Aquitaine by "Chambres d'Agriculture".Here is data about French cattle :LinkThe main cattle used for milk in Gascony used to be the "Lourdaise" : only 70 heads remain.A competitor found in central Pyrenean Gascon lands (Bigorre, Comminges, Couserans) : the "Aure" (from the Aure valley)The most successful breed : the "Gasconne".In my home Béarn, the main race used to be the "Béarnaise" : it was fused into the "Blonde d'Aquitaine" and only 90 "Béarnaises" remain. Note that the arms of Béarn show these very cows.In Bazas (South of Bordeaux), a peculiar cattle is raised for meat : that's the "Bazadaise".For other livestock breeds, see :Link

     
  3. Maju

    October 2, 2010 at 11:05 am

    Thanks for that input, Heraus. Whatever its origins, it is very apparent that the Blonde is, among the sampled breeds, the one that looks "purest" in its orange component, even more than the Gascon, which shows small zebuine blue and NW taurine yellow apportions. I'm not sure how to interpret this, but I'd say all that cluster looks very much as having a single origin anyhow, origin that maybe got emphasized by re-admixture, accidentally. I find interesting that all the breeds you mention, excepting the Bazas, show at least on occasion the lyre-shaped horns of the Betizu cattle. Surely an indicator of shared origin for all that cluster, as I suspected already. I'm not sure what to think of the rather unusual look of the Bazas bulls. In some images they give an auroch or maybe brave Spanish cattle vibe. It's intriguing.

     
  4. Unknown

    May 14, 2013 at 11:56 pm

    Mention of Angus is nice but where is the Scottish Highland cow on your charts? Too small to read? The Highland breed is one of the least changed breeds in the world.It is also the oldest registered breed.Michael McDermottBlue Ox Farms, MN. USA

     
  5. Maju

    May 15, 2013 at 12:38 am

    Not "my" charts: I'm just reporting and discussing on an academic paper by other people (which should be obvious). Obviously the sample of breeds is not exhaustive and can hardly be – but, unless I'm missing something, the absence of your favorite breed in this study is not my fault at all.

     

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

 
%d bloggers like this: