Smith-Huerta, Nancy L. , Vasek, Frank C. .
Non-random mating in the California wildflower Clarkia unguiculata.
We conducted competitive pollinations consisting of mixtures of self and outcross pollen to investigate reports of non-random mating in certain populations of Clarkia unguiculata but not in others. Furthermore, we investigated whether non-random mating could influence the proportion of self and out-cross progeny in sequential pollinations of self and out-cross pollen. We utilized recessive maternal (and self pollen donor) plants from a locality near Morro Bay, California, and dominant cross pollen donor plants from 17 localities widespread through the species range in California. Progenies from pollinations made with equal mixtures of self and cross pollen included significantly more out-crossed than self-pollinated offspring in 10 of the 17 cross-pollen donor populations. However 6 populations showed no significant difference between self- and out-cross pollinated offspring, and 1 population yielded a majority of progeny sired by self pollen. Progenies from sequential self pollen followed by outcross pollinations included, significantly more self offspring in 12 of the donor populations, no significant difference between out-cross and self offspring in 4 donor populations and significantly more out-cross offspring in one donor population. Progenies from sequential outcross pollen followed by self pollinations included significantly more out-cross offspring in 15 donor populations and no significant difference between out-cross and self offspring in 2 donor populations. Our results confirm the occurrence of non-random mating in C. unguiculata, and demonstrate that this non-random mating can influence the proportion of self and out-cross progeny in sequential pollinations.
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1 - Miami University, Department of Botany, Oxford, Ohio, 45056, USA
2 - University of California, Botany and Plant Sciences, Riverside , CA, 92507, USA
Presentation Type: Poster:Posters for Topics
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM