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1 November 2005 GENETIC CORRELATIONS DO NOT CONSTRAIN THE EVOLUTION OF SEXUAL DIMORPHISM IN THE MOSS CERATODON PURPUREUS
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Abstract

The trajectory of phenotypic evolution is constrained in the short term by genetic correlations among traits. However, the extent to which genetic correlations impose a lasting constraint is generally unknown. Here, I examine the genetic architecture of life-history variation in male and female gametophytes from two populations of the moss Ceratodon purpureus, focusing on genetic correlations within and between the sexes. A significant negative correlation between allocation to vegetative and reproductive tissue was evident in males of both populations, but not females. All traits showed between-sex correlations of significantly less than one, indicating additive genetic variance for sexual dimorphism. The degree of dimorphism for traits was significantly negatively associated with the strength of the between-sex correlation. The structure of genetic correlations among life-history traits was more divergent between the two populations in females than in males. Collectively, these results suggest that genetic correlations do not impose a lasting constraint on the evolution of life-history variation in the species.

Stuart F. McDaniel "GENETIC CORRELATIONS DO NOT CONSTRAIN THE EVOLUTION OF SEXUAL DIMORPHISM IN THE MOSS CERATODON PURPUREUS," Evolution 59(11), 2353-2361, (1 November 2005). https://doi.org/10.1554/05-381.1
Received: 13 July 2005; Accepted: 15 September 2005; Published: 1 November 2005
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