Durum wheat erosion

If there’s a dominant meta-narrative in agricultural biodiversity circles it is that modern breeding programmes relentlessly decrease the genetic diversity of crops, increasing yields and quality but also, as new varieties displace landraces and older varieties in farmers’ fields, depleting the very resource on which they are dependent for continued success. But actually there’s not really that much in the way of hard figures on this process. So a recent paper on what breeding has done to diversity in Italian durum wheat is very much to be welcomed.

The researchers used molecular and biochemical markers to compare genetic diversity among five different groups of durum varieties, ranging from landraces from before 1915, to pure lines derived from landraces in the 30s, to genotypes selected from crosses between local material and CIMMYT lines in the 70s. In general, there was indeed a narrowing of the genetic diversity within these groups over time. In fact, the degree of narrowing was probably underestimated, because only a relatively few of the pre-1915 landraces were still available for analysis. Conserving what is left is all the more important.

Rice in Italy

40869585_bdcd1db3d8_b.jpg No, not Condy Rice seeing the sights: rice the crop, and its future in Italy. It may surprise some people that rice is grown in Italy, but it has a long history of cultivation in the Po Valley, and an important place in the local cuisine, as anyone who has eaten risotto will testify. Unfortunately, the ongoing drought in the region is causing severe problems for thousands of rice farmers (among others) in the Val Padana. Some people are saying that’s the shape of things to come, with climate change and all. But here’s an interesting juxtaposition of news: it’s been announced that the Slow Food Foundation for Diversity, based in Tuscany, is to start marketing in Europe a traditional, organically grown, Filipino rice known as “unoy.” Isn’t globalization wonderful?

Photo from ciordia9 on Flickr provided under a Creative Commons license.

Swaziland takes to sorghum … and other crops

It is a mystery to me how a johnny-come-lately like maize in Africa (or for that matter tomato in Italy) can work its way into local consciousness to the extent that people not only consider it as their own but prefer it to things that actually perform better. In one small African country, Swaziland, that may be changing.

“My maize all died in the heat, or it was stunted and the cobs were so small they were only good to give to the cattle. But look at my sorghum! It is doing well,” said Nonhlanhla Thwala, a widow in Lubombo, the country’s eastern region.

The full story is in AllAfrica.com, and it is well worth reading. It seems a shame that it takes a drought and major crop failures to provoke people into reassessing their options and returning to the agricultural biodiversity they abandoned a few generations ago. But at least it is happening.

Drought resistance

A couple of very different stories about drought resistance in the media today. The first one describes – albeit very briefly – how Italian breeders have come up with a new tomato variety that needs about a quarter of the water of thirstier types. It’s not clear from the article, but I got the impression genetic modification was involved, which would be odd as some wild tomato species are found in deserts! So I did a bit of snooping on the website of ENEA, the institute where the research was done, and I found a press release from a few days back which suggests (in Italian) that perhaps it was not genetic transformation but rather functional genomics that was involved. The second piece tells us how a combination of experimental and observational work by Smithsonian Tropical Research Institute scientists in Panama is suggesting that even in the humid tropics it is drought which is limiting the distribution of many species. As climate change is expected to manifest itself primarily though shifts in rainfall patterns in the tropics, this means that dramatic changes are likely in the composition of plant communities in Central America.