Environment-dependent pleiotropic effects of mutations on the maximum growth rate r and carrying capacity K of population growth.

ABSTRACT: Maximum growth rate per individual (r) and carrying capacity (K) are key life-history traits that together characterize the density-dependent population growth and therefore are crucial parameters of many ecological and evolutionary theories such as r/K selection. Although r and K are generally thought to correlate inversely, both r/K tradeoffs and trade-ups have been observed. Nonetheless, neither the conditions under which each of these relationships occur nor the causes of these relationships are fully understood. Here, we address these questions using yeast as a model system. We estimated r and K using the growth curves of over 7,000 yeast recombinants in nine environments and found that the r-K correlation among genotypes changes from 0.53 to -0.52 with the rise of environment quality

SUBMITTER: Wei X 

PROVIDER: S-EPMC6364931 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature