Abstract Most dioecious plant species are believed to derive from hermaphrodite ancestors. Genetics of sex determination in flowering plants. We also discuss possible causes of differences and similarities between animal and angiosperm models. Evolution 25 : — Genetic linkage map of fishes of the genus Xiphophorus Teleostei: Poeciliidae.
A gradual and ongoing process of recombination restriction in the evolutionary history of the sex chromosomes in dioecius plants.
One of them is why sex determination including sex determination systems on a chromosomal level is conserved in some taxonomic groups, whereas, in others, it is highly dynamic. A model for the evolution of dioecy and gynodioecy. Plant genome: biodiversity and evolution, V.
Epigenetic control of sexual phenotype in a dioecious plant, Melandrium album. Several models have attempted to explain this three-chromosomes system. Section Otites is a group of morphologically similar dioecious species Wrigley, that are evolutionary distant from S.
The availability of closely related species, probably with chromosomes having gene content similar to that of the ancestral sex chromosomes, should show how genes have evolved since becoming sex-linked, offering a system to test between the different hypotheses.
Sex Determination in Human. The accumulation of sexually antagonistic genes as a selective agent promoting the evolution of reduced recombination between primitive sex-chromosomes. Download references. Sex Plant Repr3 : —
Hereditas 15 : — In the plant species studied so far, the cases of sex change to the opposite sex are rare Policansky, Journal List Plant Signal Behav v. Sex Plant Reprod. Select Format Select format.