The mating system of Sesbania sesban (L.) Merr. (leguminosae)

The mating system of Sesbania sesban was studied using one natural population and two cultivated populations. A large number of progeny (600) was assayed from each population for one polymorphic locus of Malate dehydrogenase (Mdh). The level of out-crossing in the studied populations ranged from 40-100 % . The genotype frequencies were in agreement with those of the Hardy-Weinberg expected genotype proportions as in randomly mating populations at P < 0.05. The floral structure and the pollen shedding behaviour of the flowers of S. sesban could favour cross-pollination and/or selfpollination depending on the circumstances. Self-pollination usually occurs late in the flowering period when pollinators fail to visit the flowers. Such a "delayed selfing" facilitates out-crossing in the presence of appropriate pollinators under natural conditions, but confers a selective advantage where pollinators are limiting. The results indicated that S. sesban could be self-fertilized in the absence of pollinators or could out-cross with other heterozygous individuals in the neighboring population when suitable pollinators are available. S. sesban exhibits "facultative xenogamy" or "delayed selfing" and is a mixed mating species.

Bibliographic Details

Main Authors:	Gebremariam, G., Nemomissa, S., Demissie, A., Hanson, Jean
Format:	Journal Article biblioteca
Language:	English
Published:	2002
Subjects:	sesbania sesban, mating systems, malate dehydrogenase, allozymes, population genetics, seeds, germination, genotypes, progeny, seed collection,
Online Access:	https://hdl.handle.net/10568/28513
Tags:	Add Tag No Tags, Be the first to tag this record!