Viking Milk and Conservation Genetics

[librarian]

The Vikings and Scandinavian seafaring pioneers loaded their small fat red cattle into their boats and took them along. The milk must have been thick, protein rich and full of butterfat. Is this milk composition related to selection for neotony, the retention of juvenile form in adult species?

Comparison of milk protein allele frequencies in Nordic cattle breeds.
Abstract

Allele frequencies at four milk protein loci were studied in five modern and 17 old Nordic cattle breeds in order to reveal variants that are characteristic for these populations. The B allele of CSN3, which has been associated with improved manufacturing properties of milk, showed significantly lower frequencies in modern production breeds than in old breeds of interest for conservation purposes. Characteristic frequencies of CSN1S1 (C), CSN2 (A2) and CSN3 (B) were found in Icelandic cattle, Swedish Mountain cattle, Northern Finncattle and Western Fjord cattle, which indicate a common origin of these populations. Further comparisons of allele frequencies in old Nordic breeds suggest sorting of these breeds into two groups with a northern and southern geographic location.
Lien, S., Kantanen, J., Olsaker, 1I., Holm, L.-E., Eythorsdottir, E., Sandberg, K., Dalsgard, B. and Adalsteinsson, S. (1999), Comparison of milk protein allele frequencies in Nordic cattle breeds. Animal Genetics, 30: 85–91. doi:10.1046/j.1365-2052.1999.00434.x


DNA-based identification of novel bovine casein gene
Abstract
In cattle, at least 39 variants of the 4 casein proteins (α(S1)-, β-, α(S2)- and κ-casein) have been described to date. Many of these variants are known to affect milk-production traits, cheese-processing properties, and the nutritive value of milk. They also provide valuable information for phylogenetic studies. So far, the majority of studies exploring the genetic variability of bovine caseins considered European taurine cattle breeds and were carried out at the protein level by electrophoretic techniques. This only allows the identification of variants that, due to amino acid exchanges, differ in their electric charge, molecular weight, or isoelectric point. In this study, the open reading frames of the casein genes CSN1S1, CSN2, CSN1S2, and CSN3 of 356 animals belonging to 14 taurine and 3 indicine cattle breeds were sequenced. With this approach, we identified 23 alleles, including 5 new DNA sequence variants, with a predicted effect on the protein sequence. The new variants were only found in indicine breeds and in one local Iranian breed, which has been phenotypically classified as a taurine breed. A multidimensional scaling approach based on available SNP chip data, however, revealed an admixture of taurine and indicine populations in this breed as well as in the local Iranian breed Golpayegani. Specific indicine casein alleles were also identified in a few European taurine breeds, indicating the introgression of indicine breeds into these populations. This study shows the existence of substantial undiscovered genetic variability of bovine casein loci, especially in indicine cattle breeds. The identification of new variants is a valuable tool for phylogenetic studies and investigations into the evolution of the milk protein genes.

J Dairy Sci. 2013 Jan;96(1):699-709. doi: 10.3168/jds.2012-5908. Epub 2012 Oct 24.
Gallinat JL1, Qanbari S, Drögemüller C, Pimentel EC, Thaller G, Tetens J.


Mol Ecol. 2009 Aug;18(16):3394-410. doi: 10.1111/j.1365-294X.2009.04286.x. Epub 2009 Jul 31.
Genetic diversity of European cattle breeds highlights the conservation value of traditional unselected breeds with high effective population size.
Medugorac I1, Medugorac A, Russ I, Veit-Kensch CE, Taberlet P, Luntz B, Mix HM, Förster M.
Author information

Abstract
In times of rapid global and unforeseeable environmental changes, there is an urgent need for a sustainable cattle breeding policy, based on a global view. Most of the indigenous breeds are specialized in a particular habitat or production system but are rapidly disappearing. Thus, they represent an important resource to meet present and future breeding objectives. Based on 105 microsatellites, we obtained thorough information on genetic diversity and population structure of 16 cattle breeds that cover a geographical area from the domestication centre near Anatolia, through the Balkan and alpine regions, to the North-West of Europe. Breeds under strict artificial selection and indigenous breeds under traditional breeding schemes were included. The overall results showed that the genetic diversity is widespread in Busa breeds in the Anatolian and Balkan areas, when compared with the alpine and north-western European breeds. Our results reflect long-term evolutionary and short-term breeding events very well. The regular pattern of allele frequency distribution in the entire cattle population studied clearly suggests conservation of rare alleles by conservation of preferably unselected traditional breeds with large effective population sizes. From a global and long-term conservation genetics point of view, the native and highly variable breeds closer to the domestication centre could serve as valuable sources of genes for future needs, not only for cattle but also for other farm animals.

 

[knabe]

there was probably a time when total milk fat was sufficient in the environment.

humans probably said they needed more milk in the form of a larger udder or amount in pale, so milk fat was diluted by the cow to compensate.

constant pressured fooled the cow into thinking the human was a calf so a more dairy looking body was deemed in order to compensate.

this type of compensation has probably been going on for decades if not centuries.

 

[aj]

So..........they milked the cows on the boat.....or they were hauling them to the new world or something. Whats your source?

 

[knabe]

So..........they milked the cows on the boat.....or they were hauling them to the new world or something. Whats your source?

a low birth weight, high weaning weight shorthorn bull from canada

 

[librarian]

I read about the Vikings taking cattle on their ships in some of the Icelandic sagas.
These ships would have been more like cargo ships.
https://books.google.com/books?id=douTBQAAQBAJ&lpg=PA44&dq=Scandinavian%20cattle%20Viking%20boat%20ship&pg=PA44#v=onepage&q=Scandinavian%20cattle%20Viking%20boat%20ship&f=false

But the memorable account is from The Vinland Saga, about the voyages of Leif Ericsson and his brother Thorvald to Greenland and the coast of Canada. Here is the story, which is not that long and certainly action packed:
Of the Wineland Voyages of Thorfinn and His Companions
  THAT same summer a ship came from Norway to Greenland. The skipper’s name was Thorfinn Karlsefni. He was a son of Thord Horsehead, and a grandson of Snorri, the son of Thord of Hofdi. Thorfinn Karlsefni, who was a very wealthy man, passed the winter at Brattahlid with Leif Ericsson. He very soon set his heart upon Gudrid, and sought her hand in marriage. She referred him to Leif for her answer, and was subsequently betrothed to him; and their marriage was celebrated that same winter. A renewed discussion arose concerning a Wineland voyage; and the folk urged Karlsefni to make the venture, Gudrid joining with the others. He determined to undertake the voyage, and assembled a company of sixty men and five women, and entered into an agreement with his shipmates that they should each share equally in all the spoils of the enterprise. They took with them all kinds of cattle, as it was their intention to settle the country, if they could. Karlsefni asked Leif for the house in Wineland; and he replied that he would lend it, but not give it. They sailed out to sea with the ship, and arrived safe and sound at Leifs-booths, and carried their hammocks ashore there. They were soon provided with an abundant and goodly supply of food; for a whale of good size and quality was driven ashore there, and they secured it, and flensed it, and had then no lack of provisions. The cattle were turned out upon the land, and the males soon became very restless and vicious: they had brought a bull with them. Karlsefni caused trees to be felled and to be hewed into timbers wherewith to load his ship, and the wood was placed upon a cliff to dry. They gathered somewhat of all of the valuable products of the land,—grapes, and all kinds of game and fish, and other good things. In the summer succeeding the first winter Skrellings were discovered. A great troop of men came forth from out the woods. The cattle were hard by, and the bull began to bellow and roar with a great noise, whereat the Skrellings were frightened, and ran away with their packs, wherein were gray furs, sables, and all kinds of peltries. They fled towards Karlsefni’s dwelling, and sought to effect an entrance into the house; but Karlsefni caused the doors to be defended [against them]. Neither [people] could understand the other’s language. The Skrellings put down their bundles then, and loosed them, and offered their wares [for barter], and were especially anxious to exchange these for weapons; but Karlsefni forbade his men to sell their weapons, and, taking counsel with himself, he bade the women carry out milk to the Skrellings, which they no sooner saw than they wanted to buy it, and nothing else. Now the outcome of the Skrellings’ trading was that they carried their wares away in their stomachs, while they left their packs and peltries behind with Karlsefni and his companions, and, having accomplished this [exchange], they went away. Now it is to be told that Karlsefni caused a strong wooden palisade to be constructed and set up around the house. It was at this time that Gudrid, Karlsefni’s wife, gave birth to a male child, and the boy was called Snorri. In the early part of the second winter the Skrellings came to them again, and these were now much more numerous than before, and brought with them the same wares as at first. Then said Karlsefni to the women, “Do ye carry out now the same food which proved so profitable before, and nought else.” When they saw this, they cast their packs in over the palisade. Gudrid was sitting within, in the doorway, beside the cradle of her infant son, Snorri, when a shadow fell upon the door, and a woman in a black namkirtle entered. She was short in stature, and wore a fillet about her head; her hair was of a light chestnut color, and she was pale of hue, and so big-eyed that never before had eyes so large been seen in a human skull. She went up to where Gudrid was seated, and said, “What is thy name?” “My name is Gudrid, but what is thy name?” “My name is Gudrid,” says she. The housewife Gudrid motioned her with her hand to a seat beside her; but it so happened that at that very instant Gudrid heard a great crash, whereupon the woman vanished, and at that same moment one of the Skrellings, who had tried to seize their weapons, was killed by one of Karlsefni’s followers. At this the Skrellings fled precipitately, leaving their garments and wares behind them; and not a soul, save Gudrid alone, beheld this woman. “Now we must needs takes counsel together,” says Karlsefni; “for that I believe they will visit us a third time in great numbers, and attack us. Let us now adopt this plan. Ten of our number shall go out upon the cape, and show themselves there; while the remainder of our company shall go into the woods and hew a clearing for our cattle, when the troop approaches from the forest. We will also take our bull, and let him go in advance of us.” The lie of the land was such that the proposed meeting-place had the lake upon the one side and the forest upon the other. Karlsefni’s advice was now carried into execution. The Skrellings advanced to the spot which Karlsefni had selected for the encounter; and a battle was fought there, in which great numbers of the band of the Skrellings were slain. There was one man among the Skrellings, of large size and fine bearing, whom Karlsefni concluded must be their chief. One of the Skrellings picked up an axe; and, having looked at it for a time, he brandished it about one of his companions, and hewed at him, and on the instant the man fell dead. Thereupon the big man seized the axe; and, after examining it for a moment, he hurled it as far as he could out into the sea. Then they fled helter skelter into the woods, and thus their intercourse came to an end. Karlsefni and his party remained there throughout the winter; but in the spring Karlsefni announces that he is not minded to remain there longer, but will return to Greenland. They now made ready for the voyage, and carried away with them much booty in vines and grapes and peltries. They sailed out upon the high seas, and brought their ship safely to Ericsfirth, where they remained during the winter.
http://www.bartleby.com/43/1.html
Sorry, but it's such a great story, how could I leave it out...

Anyway, it's more the Viking voyages to the Islands off the coast of Scotland that interest me and the way cattle were traditionally driven into the sea and forced to swim to the mainland to market.
Sounds like something a Viking cow could do.

 

[aj]

Thanks......pretty cool. I guess swimming ability would be a convenience trait.......natural selection. Grin.