Differentiation of haploid and diploid fertilities in Gracilaria chilensis affect ploidy ratio.

ABSTRACT:

Background

Algal isomorphic biphasic life cycles alternate between free-living diploid (tetrasporophytes) and haploid (dioicious gametophytes) phases and the hypotheses explaining their maintenance are still debated. Classic models state that conditional differentiation between phases is required for the evolutionary stability of biphasic life cycles while other authors proposed that the uneven ploidy abundances observed in the field are explained by their cytological differences in spore production.

Results

We monitored the state and fate of individuals of the red seaweed Gracilaria chilensis periodically for 3 years in five intertidal pools from two sites with distinct conditions. We tested for differentiation in fecundity and spore survival among the gametophyte males and

SUBMITTER: Vieira VMNCS 

PROVIDER: S-EPMC6280411 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature