Publications [#230521] of A. Jonathan Shaw

Papers Published

1. Shaw, AJ; Gaughan, JF, Control of sex ratios in haploid populations of the moss, Ceratodon purpureus, American Journal of Botany, vol. 80 no. 5 (January, 1993), pp. 584-591, WILEY [doi]
   (last updated on 2024/04/23)

   Abstract:
   A survey of 11 populations of Ceratodon purpureus showed that sex ratios are heterogeneous, but that female biases occur in more than half the populations: 160 single spore isolates representing 40 sporophytes from one population demonstrated that female gametophytes outnumbered males by a ratio of 3:2 at the time of germination. Female gametophytic clones formed significantly more biomass than male clones, and individudal female shoots were more robust. Male clones, however, produced more numerous stems. These sexually dimorphic traits may be related to life history differences between male and female gametophytes since females must provide nutritional support to the "parasitic' sporophyte generation, a burden that males do not share. -from Authors