Abstract Detail

Pollination Biology

Sorin, Yuliya [1], Karron, Jeffrey [2], Mitchell, Randall [3], Trapnell, Dorset [4].

Effects of timing of pollen arrival on selfing rate in Mimulus ringens .

Selfing rates vary widely within and among populations of self-compatible flowering plants. This variation is often attributed both to differences in proportions of self and cross pollen deposited on stigmas and variation in the timing of self and cross pollen receipt. Timing is thought to influence the intensity of self and cross pollen tube competition, as well as the extent of female choice. We experimentally quantified post-pollination processes in monkeyflower, Mimulus ringens. Flowers on each of 17 unrelated mothers received pollen from one of three experimental treatments: 1) Simultaneous deposition of 50% self pollen and 50% outcross pollen from 5 unrelated donors. 2) Application of self pollen followed 15 min later by application of outcross pollen from 5 unrelated donors. 3) Application of outcross pollen followed 15 min later by application of self pollen. Using 6 microsatellite loci, we assigned paternity to > 760 progeny. Observed selfing rates did not differ significantly among the treatments, and were close to the ratio of self and cross pollen applied to stigmas. This suggests that post-pollination processes may not be as important of a mechanism as previously thought.

1 - University of Wisconsin-Milwaukee, Dept of Biological Sciences, P.O. Box 413, Milwaukee, WI, 53201-0413, USA
2 - University Of Wisconsin-Milwaukee, Department Of Biological Sciences, PO Box 413, Milwaukee, WI, 53201, USA
3 - University Of Akron, Department Of Biology, Department Of Biology, Akron, OH, 44325-3908, USA
4 - University of Georgia, Dept of Plant Biology, Athens, GA, 30602-7271

Keywords:
selfing rate
pollination
selfing
outcrossing
mating system
Mimulus
pollen competition.

Presentation Type: Oral Paper:Papers for Topics
Session: 8
Location: Salon 6/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 9:30 AM
Number: 8006
Abstract ID:123
Candidate for Awards:None