Secrets of a longer life

时间:2019-03-06 10:08:04166网络整理admin

By Michael Brooke SIMILAR-sized animals have wildly different genome sizes, but no one has known why. Now researchers from Glasgow University have found that, in birds at least, genome size is related to longevity. In vertebrates, genome size, known as the C-value, varies enormously, from 0.4 picograms in a pufferfish to 142 pg in the African lungfish. This variation, mainly due to differing amounts of non-coding DNA, seems unrelated to an animal’s complexity, a puzzle dubbed the C-value paradox. Bird genomes, which vary from 2 pg to 3.8 pg, also seem unrelated to species size. For instance,