Abstract Detail



Reproductive Processes

Semski, Wendy [1], Karron, Jeffrey [2], Mitchell, Randall [3], Trapnell, Dorset [4], Christopher, Dorothy [1], Porcher, Emmanuelle [5], Devaux, Celine [6].

Influence of floral traits on mate diversity in monkeyflower.

Multiple mating is thought to enhance fitness in hermaphroditic flowering plants by increasing the genetic diversity of offspring, and by reducing the risk of biparental inbreeding. Although multiply sired fruits are common in many species, the extent of multiple mating can vary markedly among fruits and among individuals within populations. Our previous work with monkeyflower has shown that the number of pollinator visits strongly influences mate diversity within fruits. However, it is also possible that mate diversity has an underlying genetic basis, and that differences amongst individuals reflect differences in heritable floral traits.  In addition, almost nothing is known about how floral traits influence male mate diversity – the number of plants that receive pollen from a focal pollen donor.
We are utilizing unambiguous paternity assignment to explore how heritable floral traits influence male and female mate diversity in Mimulus ringens. This bumble bee-pollinated wetland perennial typically has 3-5 sires per fruit and floral traits such as flower size and anther-stigma separation have a high heritability (0.4 to 0.6).  We are quantifying mate diversity in each of three replicate (cloned) populations. This will allow us to explore how floral traits influence male and female mate diversity, and to test whether mate diversity has an underlying genetic basis.


1 - UW-Milwaukee, Dept of Bio Sci, P.O. Box 413, Milwaukee, Wisconsin, 53201-0413, United States
2 - University Of Wisconsin-Milwaukee, Department Of Biological Sciences, Po Box 413, Milwaukee, WI, 53201, United States
3 - University Of Akron, Department Of Biology, Dept Of Biology, Akron, OH, 44325, United States
4 - University of Georgia, Plant Biology, 2502 Miller Plant Sciences, 120 Carlton St., Athens, GA, 30602, USA
5 - MNHN, Ecology Center, 61 Rue Buffon, Paris, France
6 - University of Montpellier, ISEM, Montpellier, France

Keywords:
mate diversity
paternity
mating system
pollination.

Presentation Type: Oral Paper
Number: 0006
Abstract ID:143
Candidate for Awards:None


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