john hawks weblog

paleoanthropology, genetics and evolution

agriculture

  • Breastfeeding via rice

    Wed, 2006-05-17 09:44 -- John Hawks

    On the topic of biotechnology, this AP article describes Ventria Bioscience's field tests of rice altered with a human gene:

    Ventria, with 16 employees, practices "biopharming," the most contentious segment of agricultural biotechnology because its adherents essentially operate open-air drug factories by splicing human genes into crops to produce proteins that can be turned into medicines.

    Ventria's rice produces two human proteins found in mother's milk, saliva and tears, which help people hydrate and lessen the severity and duration of diarrhea attacks, a top killer of children in developing countries.

    Critics say that the practice of farming these genetically modified plants in the open air may "contaminate" conventional crops; the company argues that rice is self-pollinating and the spread of the gene is virtually impossible.

    The potential payoff is interesting. The idea is that the protein, expressed in human breast milk and saliva, will help to fight diarrhea, particularly in infants and children. From a PR standpoint, of course that brings in the concept of helping children in developing countries, which has been such an effective argument in favor of the so-called "golden" rice enriched with vitamin A.

    But from the article it appears that the company has a bigger market in mind:

    Ventria hopes to add its protein powder to existing infant products. There is no requirement to label any food products in the United States as containing genetically engineered ingredients.

    The company also has ambitious plans to add its product to infant formula, a $10 billion-a-year market, even though the major food manufacturers have so far shown little interest in using genetically engineered ingredients. But Deeter says Ventria can win over the manufacturers and consumers by showing the company's products are beneficial.

    "For children who are weaning, for instance, these two proteins have enormous potential to help their development," Deeter said. "Breast-fed babies are healthier and these two proteins are a big reason why."

    I think parents will buy it, and it might well be an improvement on regular infant formula -- which lately has been getting various kinds of protein additives to make it "more similar" to breast milk.

  • Frankencotton on the roll

    Mon, 2006-05-15 22:23 -- John Hawks

    Now, I hadn't considered this:

    How would the world feel, how do you feel, knowing that at the moment you are reading this you may be wearing transgenic underpants?

    Happily, the New York Times has me covered. No, not that way!

    Yes, it's that kind of story.

    Despite some opposition to genetically modified crops, even ones not grown for food, Frankencotton has been so successful that it is now grown all over the world, including the United States. It is particularly popular in Asia.

    According to a recent report in The Proceedings of the National Academy of Sciences by researchers at the University of Arizona, farmers who grew Bt cotton reduced their use of pesticides and increased the diversity of their insect populations, while protecting crops against the dread pink bollworm.

    A similar genetic modification in corn has caused an uproar. Many countries have rules about labeling food that contains genetically modified organisms, or G.M.O. Zambia, for instance, has refused to import transgenic corn. But cotton has faced no such trade barriers.

    The obvious reason is that people tend not to eat their shirts.

  • Better meat through science

    Mon, 2006-05-01 15:05 -- John Hawks

    Paul Elias of the AP reports on how geneticists are trying to make tastier hogs:

    Even before the pig genome is completed sometime next year, top commercial producers such as Pig Improvement Co. and Monsanto Inc. are using preliminary results from genetic screens to see if they can determine which pigs are the tastiest before they are butchered. The screens will also be used to manage herds and make breeding decisions, among other improvements.

    "They can now look inside the pig," Rothschild said. "They are both building better pigs with this technology."

    Cattle, too:

    Minnesota-based Cargill Inc., which supplies about 20 percent of the nation's beef, is working on a genetic screen to sort its cattle by the quality of their meat, something that can't be done now until the animal is slaughtered.

    Cargill is testing the screen on 30,000 of its cattle. If it works, the company can reserve the best feed and care for its prime beef producers, or ensure that the best animals mate with each other.

    The idea is that you eliminate a lot of guesswork by having direct genetic assays for alleles that correlate with meat quality -- instead of selecting indirectly through the observed qualities of genetic relatives.

    Most people aren't aware of how much math goes into breeding science -- and this article isn't all that helpful, calling it an "art". It's probability theory, not an art!

    In any event, genotyping is a way to raise certain probabilities, and in so doing cuts out a lot of math. It's just ironic that it takes computer screening to help us make meat taste better!

Pages

Subscribe to agriculture

Neandertals

For years, I've worked on their bones. Now I'm working on their genes. Read more about the science studying these ancient people.

Denisova

From a finger bone of an ancient human came the record of a completely unexpected population. My lab is working on the science of the Denisova genome.

Acceleration

The advent of agriculture caused natural selection to speed up greatly in humans. We're uncovering some of the ways that populations have rapidly changed during the last 10,000 years.

Malapa

Just outside Johannesburg, the Malapa site is producing some of the most exciting finds in human evolution. This site is the headquarters of the Malapa Soft Tissue Project.