Mexican dog brainfood

What’s that they say about a little knowledge? I knew the Aztecs ate dogs. I knew they kept a hairless breed of dog. So I naturally assumed they bred the hairless breed for food. So much more convenient not having to deal with all that hair in the kitchen.

Wrong. I’m sure there’s a name for this kind of logical fallacy. Be that as it may, a recent visit to the Dolores Olmedo Patiño Museum, in Xochimilco, Mexico City, where they keep a pack of that hairless breed, which is called Xoloitzcuintle by the way, quickly disabused me. A notice there points out that the name Xoloitzcuintle makes reference to Xolotl, a god associated with death (among other things). Dogs were supposed to accompany the dead on their way to the next world. Not the done thing to eat them, then, surely. It must have been other breeds that were eaten.

Well, maybe. The Wikipedia article on Xolotl says that “the meat of the Xoloitzcuintle was very much part of the diet of some of the ancient peoples of the region.” There’s no reference for that, though. What seems clear is that there were, indeed, other dog breeds. Many of the representations of dogs don’t really look like the Xoloitzcuintle at all. Squatter and fatter. Dare I say it? Jucier. There are many of them, mainly in pottery, at the museum, though I was not allowed to photograph the ones indoors.

Diego Rivera seems to have had a thing about Aztec dogs, by the way. He painted them a number of times. Here’s an example from the Palacio Nacional mural. Interestingly, though, they look a lot more like the pottery pieces than the actual Xoloitzcuintle specimens roaming around the gardens of his friend Dolores’ house.

Brainfood: Cassava in Colombia, Tubers in Peru, Breadfruit diversity, Hominins and elephants, Evolution, Domestication, Mongolian sheep, Roads, Econutrition, South Asia food composition

Italian rice at IRRI

An article about Italian rice sent me scurrying once again to the International Rice Information System. That suggests, as you can see from the diagram at left if you click on it, that the rice variety Carnaroli is in fact the result of a cross between Vialone and Lencino. Vialone Nano is also mentioned in the article, along with Arborio. You — and no doubt Italian rice farmers — will be pleased to hear that all three varieties are safely conserved in the IRRI genebank.

Mining the minerals in cowpea

ResearchBlogging.orgIn the wake of recent news of successes in biofortifying root and tuber crops like sweet potato and cassava, it is as well to remind ourselves that grains also provide micronutrients, 1 and a paper in Plant Genetic Resources: Characterization and Utilization does a good job of just that for the somewhat neglected cowpea. 2

The authors assessed 1541 accessions from the IITA genebank for the crude protein, Fe, Zn, Ca, Mg, K and P content of the grains. They found fairly wide diversity, but recognized some 9 groups of accessions within which the nutrient profiles were relatively similar. The “best” 50 accessions belonged to only three of these groups, and seven of the best 10 accessions to just one group. While admitting that “increased mineral content in the grains does not guarantee increased nutrient status for the consumer,” they concluded that

…members of some groups such as G5 and G9, which included TVu-2723, TVu-3638 and TVu-2508, would be potential sources of genes for enhancing protein and mineral concentrations in improved cowpea varieties. These lines would therefore be selected and used in crossing for generating segregating populations from where selections can be made for newly developed nutrient-dense cowpea varieties.

It may be the subject of another paper, but what Ousmane Boukar and his co-authors do not do in this one is investigate whether groups G5 and G9, which as I say are based on mineral composition, also hang together morphologically or geographically. Here’s the geographical distribution of the IITA collection, based on data in Genesys (you’ll see it better if you click on it):

The top 10 accessions in fact come from Benin, India (2), Mali, Nigeria, Puerto Rico, the US (3) and Zaire, so the latter is probably unlikely. Unfortunately, only the Mali and Benin accessions are georeferenced, but look at the nighbourhood of one of them, TVu-8810 from Benin, shown here in red:

Worth collecting a bit more around the village of Borgou?