Under how wide a set of conditions will nonrandom mating occur in Raphanus sativus (Brassicaceae)?

Studies of the weedy annual Raphanus sativus have demonstrated that nonrandom mating, a prerequisite for sexual selection, can occur in greenhouse plants. To determine whether this nonrandom mating pattern can occur under a wide range of conditions, including conditions that might occur in the field...

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Veröffentlicht in:American journal of botany 2003-11, Vol.90 (11), p.1604-1611
Hauptverfasser: Shaner, Marieken G. M, Marshall, Diane L
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Marshall, Diane L
description Studies of the weedy annual Raphanus sativus have demonstrated that nonrandom mating, a prerequisite for sexual selection, can occur in greenhouse plants. To determine whether this nonrandom mating pattern can occur under a wide range of conditions, including conditions that might occur in the field, we considered variation in both maternal condition and pollen load size. Maternal condition was varied by altering the watering regime. Pollen load size was varied from approximately 26 to 343 pollen grains per stigma. At the smallest pollen load size, patterns of seed paternity were altered in two of the three pollen donor pairs; seed paternity became more equal among donors. For one of three pollen donor pairs, seed paternity was more divergent among donors on stressed maternal plants. Finally, for one pollen donor pair, rank order of pollen donor performance changed from the medium to the small pollen loads on stressed vs. control maternal plants. Thus, some field conditions may alter patterns of nonrandom mating in wild radish.
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source Wiley Online Library Free Content; Access via Wiley Online Library; JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals
subjects Botany
Brassicaceae
Dehydration
Flowers
Flowers & plants
Fruit abortion
Fruits
maternal stress
nonrandom mating
Plant reproduction
Plants
Pollen
pollen competition
pollen load size
Pollination
Radishes
Raphanus sativus
Reproductive Biology
Seeds
Sexual selection
wild radish
title Under how wide a set of conditions will nonrandom mating occur in Raphanus sativus (Brassicaceae)?
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