[Coral-List] Genomic determinants of coral heat tolerance across latitudes
douglasfennertassi at gmail.com
Thu Jun 25 20:20:48 EDT 2015
In a warming world, existing variation in heat tolerance could help corals
beat the heat.
Dixon et al, Science 26 June 2015: Vol. 348 no. 6242 pp. 1460-1462
As global warming continues, reef-building corals could avoid local
population declines through “genetic rescue” involving exchange of
heat-tolerant genotypes across latitudes, but only if latitudinal variation
in thermal tolerance is heritable. Here, we show an up–to–10-fold increase
in odds of survival of coral larvae under heat stress when their parents
come from a warmer lower-latitude location. Elevated thermal tolerance was
associated with heritable differences in expression of oxidative,
extracellular, transport, and mitochondrial functions that indicated a lack
of prior stress. Moreover, two genomic regions strongly responded to
selection for thermal tolerance in interlatitudinal crosses. These results
demonstrate that variation in coral thermal tolerance across latitudes has
a strong genetic basis and could serve as raw material for natural
Contractor with Ocean Associates, Inc.
PO Box 7390
Pago Pago, American Samoa 96799 USA
phone 1 684 622-7084
Join the International Society for Reef Studies
"belief in climate change is optional, participation is not."
Hope from the Pope
Will Pope Francis's climate message break through where others have failed?
More information about the Coral-List