I notice an increasing variety of wheat free breads in my supermarket.
Is this because of increasing intolerance to wheat?
Genetically, it now has heaps more genes than any other food crop I know.
Is it the only plant with three sets of genes?
"Among agricultural crops, common bread or hexaploid wheat (Triticum aestivum L., 2n = 6x = 42, AABBDD) has the largest genome at 16,000 Mb, ~8-fold larger than that of maize and 40-fold larger than that of rice (ARUMUGANATHAN and EARLE 1991)."
i was advised to go off whet to treat chronic diarrhoea many years ago by an orthomolecular specialist. It worked. he said Asians starting on a wester (beef +Wheat =hamburger) diet are showing more and more auto-immune disorders like SLE. he said this was because Asians did not have the enzymes necessary to digest beef and wheat proteins.
i since met a lot of people who are gluten intolerant. A problem common among my Irish ancestors and some Jewish people.
Recently I had a stomach bio-opsy ( for an unrelated problem) and the gasto. said I was not a coeliac (someone intolerant to the gluten in wheat.) I said how could he know as i did not eat wheat. He just mumbled. As I understand it the little villi (hairy bits in the stomach) all lie down when in contact with whet and this can be seen in a bi-opsy. you therefore need therefore to be eating whet surely?!
Genetically wheat is a relative newcomer especially the cultivated version (10,000 years of cultivation); while rice has been around for 45mil years
This is agood site that discusses whet genetics
http://www.genetics.org/cgi/content/full/168/2/1087
Some quotes:-
the workshop, various approaches to sequencing the wheat genome were considered. These included selected BAC/CBCS, MF, HC, and/or a combination approach. The discussion was focused on the relative efficiency of each strategy in relation to cost and division of labor among the international participants.
The WGS approach was considered too difficult mainly because of the large size and highly repetitive nature of the wheat genome.
Grasses originated 55–75 million years ago and now dominate 20% of the land area. The three major cereals (rice, maize, and wheat), which diverged from a common ancestor ~40 million years ago, provide most of the food for humans.
Humans and wheat share a remarkably parallel evolutionary history. About 3 million years ago, humans diverged from apes, and diploid A, B, and D progenitor species of wheat diverged from a common ancestor.
About 200,000 years ago, at nearly the same time that modern humans originated in Africa, two diploid grass species hybridized to form polyploid wheat in the Middle East. Humans domesticated wheat ~15,000 years ago in the fertile crescent (modern-day Iraq and parts of Turkey, Syria, and Iran), marking the dawn of modern civilization. Comparative genetic and genomic studies during the last 10 years revealed extensive synteny among major cereals, and the concept of grasses as a single genetic system emerged.
The genome sequence of rice (420 Mb) is nearly completed, and it will serve as the anchor genome to promote gene discovery in all cereals.
However, recent data suggest that most domestication-driven, agronomic, and end-use traits, as well as those genes involved in landmark speciation events such as polyploidy, are crop and species specific.
The emerging view is that DNA sequence information of all key species is essential for investigating grasses as a single genetic system. Maize (2500 Mb) genome sequencing is underway, and wheat (16,000 Mb) genome sequencing was discussed at the workshop. Figure courtesy of W. J. Raupp, based on discussions with P. F. Byrne, Colorado State University, Fort Collins, with additional data from HUANG et al. (2002).