Tasteful breeding

A couple of days ago the Evil Fruit Lord complained — a little bit — about an article in a Ugandan newspaper which extolled the virtues of traditional crops and varieties over new-fangled hybrids. While not doubting the many attractive qualities of landraces and heirloom varieties, he quite rightly pointed out that there’s nothing to stop modern varieties and hybrids tasting just as good:

I get really sick of the tendency to talk about plant breeding as a process which makes crops into finicky, crappy tasting garbage in exchange for yield. You absolutely can create varieties which taste as good (or better) than traditional varieties, produce more, and resist pests. In fact, plant breeding is the only way to get to that.

Now there’s an article by Arthur Allen in Smithsonian magazine which basically says — not very surprisingly, I suppose — that both those things have happened in the tomato:

Flavor … has not been a goal of most breeding programs. While importing traits like disease resistance, smaller locules, firmness and thicker fruit into the tomato genome, breeders undoubtedly removed genes influencing taste. In the past, many leading tomato breeders were indifferent to this fact. Today, things are different. Many farmers, responding to consumer demand, are delving into the tomato’s preindustrial past to find the flavors of yesteryear.

Allen has a good word to say for the wild relatives:

The architect of the modern commercial tomato was Charles Rick, a University of California geneticist. In the early 1940s, Rick, studying the tomato’s 12 chromosomes, made it a model for plant genetics. He also reached back into the fruit’s past, making more than a dozen bioprospecting trips to Latin America to recover living wild relatives. There is scarcely a commercially produced tomato that didn’t benefit from Rick’s discoveries. The gene that makes such tomatoes easily fall off the vine, for instance, came from Solanum cheesmaniae, a species that Rick brought back from the Galapagos Islands. Resistances to worms, wilts and viruses were also found in Rick’s menagerie of wild tomatoes.

And he also plugs genebanks:

…we can take comfort in the tomato’s continuing, explosive diversity: the U.S. Department of Agriculture has a library of 5,000 seed varieties, and heirloom and hybrid seed producers promote thousands more varieties in their catalogs.

Not quite sure where he got that number, as the C.M. Rick Tomato Genetic Resources Center seems to have about 3,500 accessions, but anyway.

Special publication on livestock genetic resources

Livestock Science has a special issue on animal genetic resources. Or it will have, it doesn’t seem to be out yet, although some corrected proofs are available. You can get a flavour of the thing with the introduction. Here are some of the highlights:

More on the Grand Canyon’s super-sunflower

Here’s some more information on that sunflower from Supai that I blogged about yesterday. There was a huge storm last night and I was stuck indoors with not much to do, so I tried to see if I could track down the accessions in question. They’re not for sale from Native Seed/SEARCH, though they are surely in their seed bank. So I went to GRIN, guessing that duplicates of the material had probably been deposited in the USDA system.

A quick text search on “Helianthus Supai” in GRIN’s “Accession area queries” page yielded 5 PI numbers. However, only 4 are “active.” It seems there may not be enough seed available for the fifth. Incidentally, there are also accessions of maize, devil’s horn and Cercis occidentalis from this site.

Now, I could click on each of the sunflower entries and look at the available evaluation data under “Observations” to track down the specific accession with rust resistance, but there is also another way. You can go to GRIN’s “Evaluation/characterization query” page, select sunflower, go to the descriptor list, and find the specific descriptors concerning rust resistance, one of which happens to have the code RUSTNUM3. ((The 3 refers to the particular race of the rust fungus Puccinia helianthi against which the material was tested.))

It turns out that of about 1000 sunflower accessions in the US National Plant Germplasm System for which there are rust data (out of a total of over 2500), only 8 have a RUSTNUM3 value of 100, meaning they are resistant to the fungus. And PI432512, collected by Gary Nabham in 1978 from Supai, is one of them.

Underwater sunflower

Update here.

You may have seen news of the dam that burst in the Grand Canyon National Park, necessitating the evacuation of several dozen people from the native American village of Supai. What you may not know is that Supai is quite famous in agrobiodiversity circles. ((And thanks to Colin for reminding me.))

Here’s an excerpt from a 2004 issue of Seedhead News, the newsletter of Native Seed/SEARCH, which focused on sunflower:

Anthropologist Frank Cushing found sunflowers growing in the gardens of the Havasupai when he visited in 1881. Although a decline in agriculture was noted around the 1940s, there were still sunflowers being grown in Supai when NS/S co-founders Gary Nabhan and Karen Reichhardt collected there in 1978. This was timely as devastating floods later nearly wiped out farming in the Havasupai’s homeland. Those seeds found in the bottom of the Grand Canyon are now being regenerated on our farm.

And here’s the money quote:

Australian sunflower farmers experienced a crisis when a new type of rust (a fungus) infected their plants. Research scientists found that Havasupai varieties of sunflower exhibit a unique gene that is resistant to this rust. Commercial varieties of sunflower seeds to be sold in Australia will now contain this important gene. Native Seeds/SEARCH was also instrumental in returning sunflower and other native crop varieties to the Havasupai to help rebuild their farming tradition.

But here’s the really cool part. The flow of genetic resources has not been in only one direction: USDA researchers are collecting sunflowers in Australia. Interdependence is all.