Nibbles: Fish, Lupines, Dogs, Seeds, Sorghum, Oca
- Farm ponds for water, fish and livelihoods: The role of farm ponds in sustaining livelihoods.
- The nutritional value of Andalusian lupines. Domesticate ’em, someone.
- Saving the Akita … and other things.
- Bob Brockie wants to know what happened to the seeds his dad sent to Vavilov. Good luck with that.
- Q&A about sorghum farming for Guinness Ghana.
- Oca breeding in the UK. This is SO exciting …
Nibbles: Wild cassava, Oilseed rape breeding, Byelorussian food
- Wild cassava relatives could be used for nutritional enhancement.
- “…quality improvement did not significantly reduce the genetic diversity of European and Chinese Brassica rapa cultivars.”
- Byelorussian agrobiodiversity bazaar.
Upstream blast
Blast is one of the worst rice diseases. I believe that, thanks to the breeders, most modern varieties have decent levels of resistance. After all, they can be used in varietal mixtures to protect traditional glutinous rice varieties from blast. ((Zhu, Y., Chen, H., Fan, J., Wang, Y., Li, Y., Chen, J., Fan, J., Yang, S., Hu, L., Leung, H., Mew, T., Teng, P., Wang, Z., & Mundt, C. (2000). Genetic diversity and disease control in rice. Nature, 406 (6797), 718-722 DOI: 10.1038/35021046 Also see this post.)) Unfortunately, much of this resistance is not durable, because the pathogen overcomes it with time.
For a long time, durable resistance has been known to exist in some Japanese varieties. But these varieties have not been useful for resistance breeding, as the resistant parent also brought along undesired characteristics: the offspring always had poor eating quality.
Shuichi Fukuoka and colleagues have found out why. They report in Science ((Fukuoka, S., Saka, N., Koga, H., Ono, K., Shimizu, T., Ebana, K., Hayashi, N., Takahashi, A., Hirochika, H., Okuno, K., & Yano, M. (2009). Loss of Function of a Proline-Containing Protein Confers Durable Disease Resistance in Rice Science, 325 (5943), 998-1001 DOI: 10.1126/science.1175550
see also Normile, D. (2009). New Strategy Promises Lasting Resistance to a Rice Plague Science, 325 (5943), 925-925 DOI: 10.1126/science.325_925)) that it is because of a tight genetic linkage. Resistance is conferred by the Pi21 locus, and:
The eating quality of plants carrying the elite cultivar’s chromosomal sequence from a point less than 2.4 kb downstream of the Pi21 locus was equivalent to that of the elite cultivar, and the plants showed a high level of blast resistance. In contrast, plants carrying the donor chromosomal sequence up to 37 kb downstream of the Pi21 locus showed inferior eating quality.
By crossing in just the right bit of the chromosome, and making sure that the neighboring areas do not tag along, resistance can now be transferred, without spoiling the taste.
Nibbles: Forest smells, Paris herbarium, Native Seeds/SEARCH, Vertical farms, Biofuels
- Taking in the Atmosphere of the Forest is good for you.
- The Paris herbarium sorts itself out. ‘Bout time too.
- Some scientists are … keeping seeds on ice for future generations, but one Arizona seed farm is cultivating them in the desert sun.
- At last. Ford Denison blasts the vertical farm nuts. So we don’t have to.
- Fill ‘er up — with watermelon juice?