Direct and indirect selection on mate choice during pollen competition : Effects of male and female sexual traits on offspring performance following two-donor crosses
(2020) In Journal of evolutionary biology 33(10). p.1452-1467- Abstract
Mate choice in plants is poorly understood, in particular its indirect genetic benefits, but also the direct benefits of avoiding harmful matings. In the herb Collinsia heterophylla, delayed stigma receptivity has been suggested to enhance pollen competition, potentially functioning as a female mate choice trait. Previous studies show that this trait can mitigate the cost of early fertilization caused by pollen, thus providing a direct benefit. We performed two-donor pollinations during successive floral stages to assess how this stigma receptivity trait and two pollen traits known to affect siring success influence indirect benefits in terms of offspring performance. We also investigated differential resource allocation by studying the... (More)
Mate choice in plants is poorly understood, in particular its indirect genetic benefits, but also the direct benefits of avoiding harmful matings. In the herb Collinsia heterophylla, delayed stigma receptivity has been suggested to enhance pollen competition, potentially functioning as a female mate choice trait. Previous studies show that this trait can mitigate the cost of early fertilization caused by pollen, thus providing a direct benefit. We performed two-donor pollinations during successive floral stages to assess how this stigma receptivity trait and two pollen traits known to affect siring success influence indirect benefits in terms of offspring performance. We also investigated differential resource allocation by studying the influence of sibling performance in the same capsule. Offspring performance in terms of flower number was mainly affected by parental identities and differential resource allocation. Offspring seed production showed some influence of resource allocation, but was also affected by pollen donor identity and varied positively with late stigma receptivity. However, the effect of late stigma receptivity on offspring seed production was weakened in matings with pollen that advanced stigma receptivity. In conclusion, delayed stigma receptivity may be selected through both direct and indirect fitness effects in C. heterophylla, where pollen-based delay on stigma receptivity might act as a cue for mate choice. However, selection may also be counteracted by antagonistic selection on pollen to advance stigma receptivity. Our results highlight the challenges of studying indirect genetic benefits and other factors that influence mate choice in plants.
(Less)
- author
- Madjidian, Josefin A. LU ; Smith, Henrik G. LU ; Andersson, Stefan LU and Lankinen, Åsa LU
- organization
- publishing date
- 2020-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- indirect benefit, pollen tube growth rate, resource allocation, sexual selection and conflict, stigma receptivity
- in
- Journal of evolutionary biology
- volume
- 33
- issue
- 10
- pages
- 16 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:33463845
- scopus:85089174485
- ISSN
- 1010-061X
- DOI
- 10.1111/jeb.13684
- language
- English
- LU publication?
- yes
- id
- a5ed510f-e444-4709-b234-ebe2e3f7135e
- date added to LUP
- 2020-08-19 10:21:08
- date last changed
- 2024-06-12 19:30:52
@article{a5ed510f-e444-4709-b234-ebe2e3f7135e,
abstract = {{<p>Mate choice in plants is poorly understood, in particular its indirect genetic benefits, but also the direct benefits of avoiding harmful matings. In the herb Collinsia heterophylla, delayed stigma receptivity has been suggested to enhance pollen competition, potentially functioning as a female mate choice trait. Previous studies show that this trait can mitigate the cost of early fertilization caused by pollen, thus providing a direct benefit. We performed two-donor pollinations during successive floral stages to assess how this stigma receptivity trait and two pollen traits known to affect siring success influence indirect benefits in terms of offspring performance. We also investigated differential resource allocation by studying the influence of sibling performance in the same capsule. Offspring performance in terms of flower number was mainly affected by parental identities and differential resource allocation. Offspring seed production showed some influence of resource allocation, but was also affected by pollen donor identity and varied positively with late stigma receptivity. However, the effect of late stigma receptivity on offspring seed production was weakened in matings with pollen that advanced stigma receptivity. In conclusion, delayed stigma receptivity may be selected through both direct and indirect fitness effects in C. heterophylla, where pollen-based delay on stigma receptivity might act as a cue for mate choice. However, selection may also be counteracted by antagonistic selection on pollen to advance stigma receptivity. Our results highlight the challenges of studying indirect genetic benefits and other factors that influence mate choice in plants.</p>}},
author = {{Madjidian, Josefin A. and Smith, Henrik G. and Andersson, Stefan and Lankinen, Åsa}},
issn = {{1010-061X}},
keywords = {{indirect benefit; pollen tube growth rate; resource allocation; sexual selection and conflict; stigma receptivity}},
language = {{eng}},
number = {{10}},
pages = {{1452--1467}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Journal of evolutionary biology}},
title = {{Direct and indirect selection on mate choice during pollen competition : Effects of male and female sexual traits on offspring performance following two-donor crosses}},
url = {{http://dx.doi.org/10.1111/jeb.13684}},
doi = {{10.1111/jeb.13684}},
volume = {{33}},
year = {{2020}},
}