- Seawater is the next water.
- EMBRAPA’s booklets on “unconventional” vegetables.
- Money should put its money where its money is.
- Kids make genebank.
- Malta makes genebank.
- Native Americans used to smoke unusual tobacco species, and non-tobacco species too for that matter.
Measuring biodiversity next year
Just a reminder to everyone that the CBD is soliciting comments on the proposed Post-2020 global biodiversity framework.
Needless to say, Sean Hoban and colleagues have been thinking this through and are proposing genetic diversity targets and indicators, and for all species, not just crops and their wild relatives:
- the number of populations with effective population size above versus below 500
- the proportion of populations maintained within species,
- the number of species and populations in which genetic diversity is monitored using DNA-based methods.
Better than genebank accession numbers, I guess, but are they “simple” enough to measure repeatedly and consistently?
Oh, and by the way, there’s also a proposal around to have a single, headline global extinction target.
Beyond the smelly durian cliches
Malaysian photojournalist and political analyst Amirul Ruslan reads a NY Times despatch from Bangkok and thinks it’s time to decolonise writing about tropical fruits. Agreed.
LATER: And the whole thing gains some traction in Australia.
Nibbles: Olive plague, ITPGRFA, Potato, Sweetpotato, Guinea pig, Amazon farming, Unilever, Apomixis, Pathogens, Reindeer,
- The Xylella butcher’s bill mounts up.
- Webinar on the Plant Treaty.
- The history of the humble: potato, sweetpotato, guinea pig.
- Agroforestry in the forest.
- Unilever does C labelling. Biodiversity next?
- Hacking apomixis in sorghum and cowpea so farmers can save seeds of hybrids.
- Temperature range and plant host range of fungus and oomycete pathogens change rapidly and are not correlated.
- In from the cold: Rudolph’s genome.
- Rethinking public gardens in a series of 5-minute presentations.
Decolonizing Canary sheep
Yesterday’s Brainfood included the paper “Genetic diversity evolution of a sheep breed reintroduced after extinction: Tracing back Christopher Columbus’ first imported sheep.” This sounds intriguing enough from the title and abstract to piss off a lot of our readers for the rest being behind a paywall. Actually, though, you can find it on ResearchGate. But it’s a long read, so here’s the short version, which also draws from an article in FAO’s newsletter Animal Genetic Resources Information dating back to 2000.
Before being conquered by the Spaniards in the late 15th century, the Canary Islands were home to non-wooly (i.e. hairy) sheep. This is surprising because nearby Northwest Africa has had mostly wooly sheep from 4000–3000 BC. Hairy sheep are adapted to humid tropical conditions and are more prevalent in sub-Saharan Africa. They may have been taken to the Canaries between 3000–2000 BC by the first inhabitants of the islands as they expanded northwest during a period of more favourable climates.
From the Canaries, they were taken to the Caribbean, starting with Columbus’ second journey, and thereafter spread through the Americas. There, they were crossed with other hairy breeds brought from sub-Saharan Africa with the trade in enslaved Africans. Meanwhile, they eventually went extinct back in the Canary Islands, due to cross-breeding with more productive sheep, and changes in the agricultural system as a result of Spanish colonization.
In the 1950’s, however, hairy sheep, likely the descendants of the original introductions, were taken back to the Canaries from Venezuela, where they were nurtured, and thrived. The resulting current population of Canary Hair Sheep seems to have fairly high diversity, high census and effective population sizes, and satisfactory numbers of newborn animals registered per year. It thus seems to be a good example of successful “recreation” (or as near as one can figure it) of an extinct breed.