|Muck and Mystery
Loitering With Intent
|blog - at - crumbtrail.org|
Some people think that old fashioned varieties of foods are better than newer "improved" cultivars. That depends on just how old fashioned they are.
Sometime during its domestication (some 10,000 years ago) wheat underwent a change that lowered the protein, zinc and iron content in its grain.So, if your heritage wheat variety was popular over 10,000 years ago then it is better in some ways. Otherwise, get the new stuff.
In 2006, after years of mapping, Dubcovsky and his team discovered the culprit - a mutation in a gene called NAM-B1. In healthy grain plants, NAM-B1 controls the remobilizing and distribution of nutrients to the grains when the leaves die off. Without a working copy of the gene, cultivated wheat is not a good processor of its nutrients, so large amounts of protein, iron and zinc are left in its straw.
Dubcovsky’s team then examined the ancestors of commercial wheat and found, amazingly enough, a fully functional NAM-B1 gene within the genome of wild emmer wheat. Emmer wheat can be freely crossed with domestic wheat using conventional means, so no controversial genetic engineering methods were needed to restore the lost gene. . .
The new plants are in the public domain, distributed to breeders across the globe. Some 2 billion people around the world lack adequate micronutrients, so more nutritious wheat could make a big difference in fighting world hunger.