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The effects of quantitative fecundity in the haploid stage on reproductive success and diploid fitness in the aquatic peat moss Sphagnum macrophyllum.
Heredity (Edinb). 2016 06; 116(6):523-30.H

Abstract

A major question in evolutionary biology is how mating patterns affect the fitness of offspring. However, in animals and seed plants it is virtually impossible to investigate the effects of specific gamete genotypes. In bryophytes, haploid gametophytes grow via clonal propagation and produce millions of genetically identical gametes throughout a population. The main goal of this research was to test whether gamete identity has an effect on the fitness of their diploid offspring in a population of the aquatic peat moss Sphagnum macrophyllum. We observed a heavily male-biased sex ratio in gametophyte plants (ramets) and in multilocus microsatellite genotypes (genets). There was a steeper relationship between mating success (number of different haploid mates) and fecundity (number of diploid offspring) for male genets compared with female genets. At the sporophyte level, we observed a weak effect of inbreeding on offspring fitness, but no effect of brood size (number of sporophytes per maternal ramet). Instead, the identities of the haploid male and haploid female parents were significant contributors to variance in fitness of sporophyte offspring in the population. Our results suggest that intrasexual gametophyte/gamete competition may play a role in determining mating success in this population.

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Authors+Show Affiliations

Johnson MG
Department of Biology, Duke University, Durham, NC, USA.
Shaw AJ
Department of Biology, Duke University, Durham, NC, USA.

MeSH

DiploidyFertilityGenetic FitnessGenetic VariationGenotypeGerm Cells, PlantHaploidyInbreedingMicrosatellite RepeatsSouth CarolinaSphagnopsida

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26905464

Citation

Johnson, M G., and A J. Shaw. "The Effects of Quantitative Fecundity in the Haploid Stage On Reproductive Success and Diploid Fitness in the Aquatic Peat Moss Sphagnum Macrophyllum." Heredity, vol. 116, no. 6, 2016, pp. 523-30.
Johnson MG, Shaw AJ. The effects of quantitative fecundity in the haploid stage on reproductive success and diploid fitness in the aquatic peat moss Sphagnum macrophyllum. Heredity (Edinb). 2016;116(6):523-30.
Johnson, M. G., & Shaw, A. J. (2016). The effects of quantitative fecundity in the haploid stage on reproductive success and diploid fitness in the aquatic peat moss Sphagnum macrophyllum. Heredity, 116(6), 523-30. https://doi.org/10.1038/hdy.2016.13
Johnson MG, Shaw AJ. The Effects of Quantitative Fecundity in the Haploid Stage On Reproductive Success and Diploid Fitness in the Aquatic Peat Moss Sphagnum Macrophyllum. Heredity (Edinb). 2016;116(6):523-30. PubMed PMID: 26905464.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effects of quantitative fecundity in the haploid stage on reproductive success and diploid fitness in the aquatic peat moss Sphagnum macrophyllum. AU - Johnson,M G, AU - Shaw,A J, Y1 - 2016/02/24/ PY - 2015/08/16/received PY - 2015/11/23/revised PY - 2015/12/29/accepted PY - 2016/2/25/entrez PY - 2016/2/26/pubmed PY - 2017/6/22/medline SP - 523 EP - 30 JF - Heredity JO - Heredity (Edinb) VL - 116 IS - 6 N2 - A major question in evolutionary biology is how mating patterns affect the fitness of offspring. However, in animals and seed plants it is virtually impossible to investigate the effects of specific gamete genotypes. In bryophytes, haploid gametophytes grow via clonal propagation and produce millions of genetically identical gametes throughout a population. The main goal of this research was to test whether gamete identity has an effect on the fitness of their diploid offspring in a population of the aquatic peat moss Sphagnum macrophyllum. We observed a heavily male-biased sex ratio in gametophyte plants (ramets) and in multilocus microsatellite genotypes (genets). There was a steeper relationship between mating success (number of different haploid mates) and fecundity (number of diploid offspring) for male genets compared with female genets. At the sporophyte level, we observed a weak effect of inbreeding on offspring fitness, but no effect of brood size (number of sporophytes per maternal ramet). Instead, the identities of the haploid male and haploid female parents were significant contributors to variance in fitness of sporophyte offspring in the population. Our results suggest that intrasexual gametophyte/gamete competition may play a role in determining mating success in this population. SN - 1365-2540 UR - https://www.unboundmedicine.com/medline/citation/26905464/The_effects_of_quantitative_fecundity_in_the_haploid_stage_on_reproductive_success_and_diploid_fitness_in_the_aquatic_peat_moss_Sphagnum_macrophyllum_ DB - PRIME DP - Unbound Medicine ER -