Skip to Main Content
Morph-specific mating patterns in a low-density population of a heterodichogamous tree, Juglans ailantifoliaAuthor(s): Megumi K. Kimura; Susumu Goto; Yoshihisa Suyama; Masaki Matsui; Keith Woeste; Kenji Seiwa
Source: Plant Ecology
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (446.0 KB)
DescriptionHeterodichogamy, including protandrous (PA) and protogynous (PG) morphs, is considered a mechanism to avoid selfing and promote disassortative mating. Although morphotypes are usually present in a population at a 1:1 ratio, this ratio may be biased in a low-density population by demographic stochasticity, resulting in a deficiency of mating partners in a neighbourhood dominated by a single morph. In this study, we determined morph ratio of the heterodichogamous tree species, Juglans ailantifolia by observing flowering in a low-density population during 2 years. The morph ratio (PG: PA) of 2.56:1 deviated significantly deviated from 1:1. We genotyped 59 reproductive trees and 405 offspring derived from eight PG-mother and three PA-mother trees with 11 microsatellite markers. Paternity analysis was conducted to clarify the effects of mother morph on the proportion of intra-morph mating. Then, we applied the Bayesian mixed effect mating model (MEMM) to clarify mating system, pollen dispersal, and individual fecundity of PG- and PA-mother trees. We found that the selfing rate and the distance of pollen dispersal were not clearly different between PG- and PA-mother trees. In contrast, the proportion of intra-morph mating was higher in the majority-morph (PG) mother trees than in the minor-morph (PA) mother trees. The MEMM indicated that mean dispersal distance of PG-mother trees was larger than that of PA-mother trees with large variance. Furthermore, we observed individuals with unusually high intra-morph fecundity for majority-morph (PG) trees. These findings indicate that intra-morph mating may occur when majoritymorph mothers suffer a deficiency of potential intermorph mates.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKimura, Megumi K.; Goto, Susumu; Suyama, Yoshihisa; Matsui, Masaki; Woeste, Keith; Seiwa, Kenji. 2012. Morph-specific mating patterns in a low-density population of a heterodichogamous tree, Juglans ailantifolia. Plant Ecology. 213(9): 1477-1487. https://doi.org/10.1007/s11258-012-0105-6.
KeywordsFlowering phenology, Heterodichogamy, Juglans ailanthifolia, Microsatellites, Mixed effect mating model, Selfing
- Gene flow among wild and cultivated common walnut (Juglans regia) trees in the Qinling Mountains revealed by microsatellite markers
- Genetic homogeneity in Juglans nigra(Juglanaceae) at nuclear microsatellites
- Mating patterns in a savanna population of valley oak (Quercus labata Neé)
XML: View XML