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.

Nibbles for the road: Baobab, Breeding, Gardening, Earthworms, Taro, Pollinators, Llama, Trees, Chili peppers

Nibbles: Dog genetics, ITPGRFA, Mapping, Neolithic, Insects, Markers, Soybeans, Milk

Re-synthesizing crops

Jeremy recently mused about the possibility of reconstructing the cultivated peanut. As coincidence would have it, a brace of papers just out look at the same thing for a couple of other crops.

A team from the US, Canada and Turkey describe in Euphytica how they reconstructed the modern cultivated dessert strawberry (Fragaria x ananassa) by crossing F. virginiana and F. chiloensis. That’s what happened in the 18th century in some gardens in Britanny once the Chilean strawberry, cultivated for a thousand years by the Mapuche, found its way there after its introduction to Europe by the French spy, Captain Amédée-François Frézier, and met the wild Virginia strawberry. That had started replacing the local cultivated F. vesca in European gardens up to a century before. The researchers were able to come up with significantly better varieties of dessert strawberry by being careful to choose a wider range of elite, complementary genotypes as parents.

And over at GRACE, Iranian and Japanese researchers looked for areas where cultivated tetraploid (durum) wheat is found together with the other putative parent of bread wheat, i.e. wild/weedy Aegilops tauschii. They found the two species in close proximity in two districts in the central Alborz Mountains. So, the “association hypothesized in the theory of bread wheat evolution staill exists in the area where bread wheat probably originated.” The paper does not report finding any natural hybrids, but it does suggest that further field studies should be undertaken, presumably to look for evidence of such introgression.