Results 281 to 290 of about 4,773,873 (317)
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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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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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Cryptic Self-Fertilization in the Malpighiaceae
Science, 1980Some 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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Observations on self-fertile clones of kiwifruit
New Zealand Journal of Crop and Horticultural Science, 1991Abstract Two self-fertile clones of Actinidia deliciosa (A. Chev.) C.F. Liang et A.R. Ferguson from a kiwifruit orchard near Naples, Italy, were studied in the open field and in the laboratory during 1986–89. Data on flowers show that the androecium and gynoecium were both normally developed, and viable pollen was produced in appreciable amounts ...
BELLINI E, PILONE, NICOLA, ROTUNDO A.
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Evolution of Self-Fertile Hermaphrodites
2011Self-fertile hermaphrodites have evolved in several independent lineages of nematodes. Surprisingly, both C. elegans and C. briggsae have recruited members of the large family of F-box genes to promote hermaphrodite development. However, C. elegans FOG-2 and C. briggsae SHE-1 have different biochemical functions, and each was created by a unique series
Ronald E. Ellis, Yiqing Guo
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SELF-FERTILITY IN BOTRYOTINIA PORRI
Canadian Journal of Botany, 1964Apothecia were produced in culture from mass conidial isolates of Botrylis porri (v. Beyma) Buchw. From these apothecia single ascospore cultures were obtained which produced apothecia in unspermatized dishes. It is concluded that Botryotinia porri is self-fertile.
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Durable Resistance in Self-Fertilizing Annuals
1983Durability of resistance varies greatly. It is easy to recognize good levels of resistance. The durability of such a resistance can hardly be assessed on small plots and in a short time span. But over the years experience has accumulated. Many resistances, both of a simple and of a more complex inheritance have shown to be durable.
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Evolutionary Rates in Partially Self-Fertilizing Species
The American Naturalist, 1992This article develops models of the rates of fixation of mutant genes in partially self-fertilizing populations, with particular emphasis on the effect of the level of dominance of a favorable mutation on its probability of fixation. It is shown that even a moderate rate of selfing greatly increases the probability of fixation of a favorable recessive ...
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Oviparous Hermaphroditic Fish with Internal Self-Fertilization
Science, 1961Adults of Rivulus marmoratus (Cyprinodontidae) contained eggs when dissected or laid eggs when kept alive. They invariably oviposited solo, emitting eggs in various developmental stages. Both juvenescent and senescent fish have functional ovotestes.
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Polyploidy and self‐fertilization in flowering plants
American Journal of Botany, 2007Mating 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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