Results 261 to 270 of about 4,672,682 (301)

The Evolution of Self‐Fertilization in Perennials

The American Naturalist, 1997
Many plants are perennials, but studies of self-fertilization do not usually include features of perennial life histories. We therefore develop models that include selfing, a simple form of perenniality, adult inbreeding depression, and an adult survivorship cost to seed production. Our analysis shows that inbreeding depression in adults diminishes the
Morgan, M.T., Schoen, D.J., Bataillon, T.M.   +2 more
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SELF-FERTILITY IN THE SCLEROTINIACEAE

Canadian Journal of Botany, 1961
Nine species representing five genera of the Sclerotiniaceae were found to be self-fertile. These are as follows: Ciboria acericola sp. nov., C. acerina Whetz. & Buchw., C. amentacea (Balb. ex Fr.) Fckl., C. betulicola sp. nov., C. caucus (Rebent. ex Fr.) Fckl., Ciborinia erythronii (Whetz.) Whetz., Rutstroemia paludosa (Cash & Davidson) comb ...
J. Walton Groves, Mary E. Elliott
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Cryptic Self-Fertilization in the Malpighiaceae

Science, 1980
Some Malpighiaceae produce minute cleistogamous flowers in addition to showy chasmogamous flowers. Standard techniques fail to reveal how the cleistogamous flowers achieve self-fertilization. Fluorescence in longitudinal sections shows that the pollen germinates inside the indehiscent anther.
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Breeding for Self-Fertility

1984
Advantages and disadvantages of self-fertile cultivars are discussed, and a method to avoid the complete loss of heterosis is suggested. Nine components of self-fertility related with the processes of pod and seed production were analysed from a genetic point of view.
J. I. Cubero, M. T. Moreno
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Preventing Self-fertilization

2007
AbstractPerfect (hermaphrodite) flowers can, assuming no other constraints, self-pollinate, and fertilize their own ovules. This guaranteed sexual reproduction gives self-pollinating plants the ability to colonize new habitats, and it is a common trait in weedy species.
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Selection within Self-Fertilizing Populations

Biometrics, 1978
A theoretical formulation of continuing selection in finite populations due to Hill (1969) is used to study the e.ects on the frequencies of the various genotypes of selecting the best individual plant according to the values of a single quantitative trait in a population that reproduces entirely by selfing. As an example of the use of the method, some
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Polyploidy and self‐fertilization in flowering plants

American Journal of Botany, 2007
Mating systems directly control the transmission of genes across generations, and understanding the diversity and distribution of mating systems is central to understanding the evolution of any group of organisms. This basic idea has been the motivation for many studies that have explored the relationships between plant mating systems and other ...
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Expectations for Inbreeding Depression on Self-Fertilization of Tetraploids

Biometrics, 1976
The contribution to the inbreeding depression from a digenic tetrasomic locus upon self-fertilization involves three genotypic interaction effects which may be thought of as a generalization of the dominance deviation for a diploid locus. It is shown how this contribution may be expressed in terms of these genotypic interaction effects, the gene ...
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Variation in self-fertility and the reproductive advantage of self-fertility for an invading plant (Spartina alterniflora)

Evolutionary Ecology, 1998
The factors responsible for the reproductive success or failure of individuals in small, founding populations have received little attention. Previous work on a small population of smooth cordgrass (Spartina alterniflora) invading San Francisco Bay, California found that most clones flower prolifically but set little or no seed, while a few clones have
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