Multiple factors influence population sex ratios in the Mojave Desert moss Syntrichia caninervis

摘要: Premise of research: Natural populations many mosses appear highly female-biased based on the presence reproductive structures. This bias could be caused by increased male mortality, lower growth rate, or a higher threshold for achieving sexual maturity in males. Here we test these hypotheses using samples from two Mojave Desert moss S. caninervis . Methods: We used double digest restriction-site associated DNA (RAD) sequencing to identify candidate sex-associated loci panel sex-expressing plants. Next, putative markers sex individuals without Key results: found an 18:1 phenotypic female: ratio elevation site (Wrightwood), and no expression at low (Phelan). In contrast, genetic data 2:1 female Wrightwood only females Phelan site. The area occupied genets was indistinguishable. Conclusions: These suggest that both differential mortality dimorphism thresholds likely contribute population biases, alone fails capture extent actual present natural