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Morph-ratio variation, population size and female reproductive success in distylous Pulmonaria officinalis (Boraginaceae)

Rein Brys UGent, H Jacquemyn and Tom Beeckman UGent (2008) JOURNAL OF EVOLUTIONARY BIOLOGY. 21(5). p.1281-1289
abstract
Theory predicts that morph ratios in heterostylous populations are governed by negative frequency-dependent selection typically resulting in equal morph ratios at equilibrium. Previous work on the distylous perennial herb Pulmonaria officinalis, however, showed asymmetric mating between floral morphs and a weak self-incompatibility system, with the long-styled morph (L-morph) producing significantly higher seed set following intramorph crosses and even selfing than the short-styled morph (S-morph), two aspects thought to affect female fecundity and morph-ratio variation. Here, we evaluated morph ratios and population size of all known P. officinalis populations in the northern part of Belgium. Morph ratios deviated significantly from 1 : 1 (range 0.09-1 L-morph frequency, mean = 0.58). Relative fecundity of the S-morph (i.e. mean seed set of the S-morph/mean seed set of the L-morph) was on average 0.73, was positively related to the frequency of the L-morph, and reached 1 (similar levels of female fecundity) at an average L-morph frequency of 0.66 in the population. As some small populations had the S-morph in majority, our results suggest that local morph ratios are influenced both by the relative fecundity of L- and S-morph individuals and by stochastic processes in small populations.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
frequency-dependent reproduction, disassortative mating, legitimate pollination, lungwort, morph bias, pollen limitation, sexual polymorphism, weak incompatibility, EICHHORNIA-PANICULATA PONTEDERIACEAE, HETEROMORPHIC INCOMPATIBILITY SYSTEM, TRISTYLOUS LYTHRUM-SALICARIA, PRIMULA-VERIS, SELF-INCOMPATIBILITY, SEXUAL REPRODUCTION, POLLEN-LIMITATION, AQUATIC PLANT, EVOLUTION, CONSEQUENCES
journal title
JOURNAL OF EVOLUTIONARY BIOLOGY
J. Evol. Biol.
volume
21
issue
5
pages
1281 - 1289
Web of Science type
Article
Web of Science id
000258379600011
JCR category
ECOLOGY
JCR impact factor
3.471 (2008)
JCR rank
27/124 (2008)
JCR quartile
1 (2008)
ISSN
1010-061X
DOI
10.1111/j.1420-9101.2008.01569.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
439477
handle
http://hdl.handle.net/1854/LU-439477
date created
2008-11-12 14:01:00
date last changed
2012-12-05 17:35:58
@article{439477,
  abstract     = {Theory predicts that morph ratios in heterostylous populations are governed by negative frequency-dependent selection typically resulting in equal morph ratios at equilibrium. Previous work on the distylous perennial herb Pulmonaria officinalis, however, showed asymmetric mating between floral morphs and a weak self-incompatibility system, with the long-styled morph (L-morph) producing significantly higher seed set following intramorph crosses and even selfing than the short-styled morph (S-morph), two aspects thought to affect female fecundity and morph-ratio variation. Here, we evaluated morph ratios and population size of all known P. officinalis populations in the northern part of Belgium. Morph ratios deviated significantly from 1 : 1 (range 0.09-1 L-morph frequency, mean = 0.58). Relative fecundity of the S-morph (i.e. mean seed set of the S-morph/mean seed set of the L-morph) was on average 0.73, was positively related to the frequency of the L-morph, and reached 1 (similar levels of female fecundity) at an average L-morph frequency of 0.66 in the population. As some small populations had the S-morph in majority, our results suggest that local morph ratios are influenced both by the relative fecundity of L- and S-morph individuals and by stochastic processes in small populations.},
  author       = {Brys, Rein and Jacquemyn, H and Beeckman, Tom},
  issn         = {1010-061X},
  journal      = {JOURNAL OF EVOLUTIONARY BIOLOGY},
  keyword      = {frequency-dependent reproduction,disassortative mating,legitimate pollination,lungwort,morph bias,pollen limitation,sexual polymorphism,weak incompatibility,EICHHORNIA-PANICULATA PONTEDERIACEAE,HETEROMORPHIC INCOMPATIBILITY SYSTEM,TRISTYLOUS LYTHRUM-SALICARIA,PRIMULA-VERIS,SELF-INCOMPATIBILITY,SEXUAL REPRODUCTION,POLLEN-LIMITATION,AQUATIC PLANT,EVOLUTION,CONSEQUENCES},
  language     = {eng},
  number       = {5},
  pages        = {1281--1289},
  title        = {Morph-ratio variation, population size and female reproductive success in distylous Pulmonaria officinalis (Boraginaceae)},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2008.01569.x},
  volume       = {21},
  year         = {2008},
}

Chicago
Brys, Rein, H Jacquemyn, and Tom Beeckman. 2008. “Morph-ratio Variation, Population Size and Female Reproductive Success in Distylous Pulmonaria Officinalis (Boraginaceae).” Journal of Evolutionary Biology 21 (5): 1281–1289.
APA
Brys, R., Jacquemyn, H., & Beeckman, T. (2008). Morph-ratio variation, population size and female reproductive success in distylous Pulmonaria officinalis (Boraginaceae). JOURNAL OF EVOLUTIONARY BIOLOGY, 21(5), 1281–1289.
Vancouver
1.
Brys R, Jacquemyn H, Beeckman T. Morph-ratio variation, population size and female reproductive success in distylous Pulmonaria officinalis (Boraginaceae). JOURNAL OF EVOLUTIONARY BIOLOGY. 2008;21(5):1281–9.
MLA
Brys, Rein, H Jacquemyn, and Tom Beeckman. “Morph-ratio Variation, Population Size and Female Reproductive Success in Distylous Pulmonaria Officinalis (Boraginaceae).” JOURNAL OF EVOLUTIONARY BIOLOGY 21.5 (2008): 1281–1289. Print.