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Nucleocytoplasmic male-sterility and alternative routes to dioecy (CROSBI ID 162195)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Schultz, Stewart T. Nucleocytoplasmic male-sterility and alternative routes to dioecy // Evolution, 48 (1994), 6; 1933-1945. doi: 10.2307/2410518

Podaci o odgovornosti

Schultz, Stewart T.

engleski

Nucleocytoplasmic male-sterility and alternative routes to dioecy

Population-genetic models of nucleo-cytoplasmic gynodioecy are shown to allow invasion of males and conversion to dioecy in a single cytotype. Pleiotropic effects of restorer alleles on fertility through male or female function can maintain a cytoplasmic polymorphism in a population that prevents evolution to dioecy regardless of the pollen fertility of males. However, a cytoplasmic polymorphism has little effect on, and may even reduce, the minimum pollen fertility required for the spread of males into an equilibrium gynodioecious population. Where the thresholds for dioecy are similar, the presence of males during a transient preequilibrium high frequency of females can accelerate evolution to dioecy by more than 50 times relative to nuclear male sterility. However, the appearance of a nonrestorable male-sterile cytotype generally eliminates males from both subdioecious and dioecious populations, converting them to purely cytoplasmic gynodioecy. These models contradict the previously suggested notion that nucleo-cytoplasmic gynodioecy represents a ''stable'' intermediate breeding system and instead show that such gynodioecy can generally evolve to subdioecy, and often to dioecy, as easily as nuclear gynodioecy.

androdioecy ; dioecy ; female sterility ; gynodioecy ; male sterility ; subdioecy

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

48 (6)

1994.

1933-1945

objavljeno

0014-3820

10.2307/2410518

Povezanost rada

Biologija

Poveznice
Indeksiranost