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The Genetic Basis of Adaptation to Novel Environments in Chlamydomonas Reinhardtii

Torsten Bernhardt

出版	McGill University, 1995
URL	http://books.google.com.hk/books?id=m48cQwAACAAJ&hl=&source=gbs_api

註釋

Four pairs of selection lines of Chlamydomonas reinhardtii were each founded by mt+ and mt- spores from the same zygote. They were cultured asexually under light (photoautotrophic) and dark (heterotrophic) conditions for several hundred generations. The light and dark lines derived from each spore had by then diverged, each becoming adapted to its selection environment Sister lines were then crossed. Crosses between lines selected in the same environment (mt+light x mt-light and mt+dark x mt-dark) showed that adaptation was heritable and generally additive; however, some lines showed substantial epistasis. Crosses between lines selected in different environments (mt+light x mt-dark and mt+dark x mt-night) suggested that chloroplast and mitochondrial genomes contributed to adaptation, genes evolving in the light being borne on the chloroplast and those evolving in the dark on the mitochondrion.