Results 161 to 170 of about 2,115 (184)
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Gametophytic self-incompatibility in Nicotiana alata
1994Self-incompatibility (SI), ‘the inability of a fertile hermaphrodite seed plant to produce zygotes after self-pollination’ (de Nettancourt 1977), is one of the mechanisms that has evolved to encourage outbreeding in flowering plants. The effectiveness of self-incompatibility in promoting outbreeding is believed to be one of the most important factors ...
Ed Newbigin +2 more
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Molecular Mechanisms Underlying The Breakdown Of Gametophytic Self‐incompatibility
The Quarterly Review of Biology, 2002The breakdown of self-incompatibility has occurred repeatedly throughout the evolution of flowering plants and has profound impacts on the genetic structure of populations. Recent advances in understanding of the molecular basis of self-incompatibility have provided insights into the mechanisms of its loss in natural populations, especially in the ...
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Gametophytic Self-Incompatibility: Biochemical, Molecular Genetic, and Evolutionary Aspects
1992Publisher Summary This chapter focuses on the gametophytic self-incompatibility—a prezygotic barrier to self-fertilization in plants that otherwise produce fully functional gametes. Two types of reproductive barriers operate in plants: interspecific and intraspecific.
A, Singh, T H, Kao
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Population Genetic Aspects of Gametophytic Self incompatibility
Plant Species Biology, 1996Abstract In gametophytic self‐incompatibility, the S‐locus encodes an S‐protein whose expression results in successful pollination only when the pollen allele differs from both maternal alleles. Analysis of nucleotide and amino acid sequences of a number of S‐alleles has revealed extraordinary allelic sequence ...
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Molecular Genetics of Gametophytic Self-incompatibility in Solanaceae
1992Self-incompatibility exhibited by members of the Solanaceae family is of gametophytic type and, in the simplest case, is controlled by a single multiallelic locus called the S-locus. (For a comprehensive treatise on the self-incompatibility system refer to the monograph by de Nettancourt, 1977.) Fertilization is blocked when the S-allele carried by the
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A gene action model to explain gametophytic self-incompatibility
Euphytica, 1966Gametophytic self-incompatibility in flowering plants can be explained in terms of recent concepts of gene action. The S alleles may be assumed to be regulators which produce monomers of a dimer repressor controlling a high rate of growth operon in the pollen tube.
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Molecular genetics of gametophytic self-incompatibility in Petunia hybrida
1994The most famous, if not necessarily the first, description of gametophytic self-incompatibility in Petunia was given by Charles Darwin (1876), who noted: ... for protected flowers, with their own pollen placed on the stigma, never yielded nearly a full complement of seed; whilst those left uncovered produced fine capsules, showing that pollen from ...
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[Progress in study on signal transduction of gametophytic self-incompatibility].
Yi chuan = Hereditas, 2008In nature, most self-incompatible flowering plants (angiosperms) show gametophytic self-incompatibility. Although gametophytic self-incompatibility functions can ultimately prevent self-fertilization, flowering plants have adopted different signal transduction pathways to reject self pollen.
Xing-Guo, Lan, Xiao-Min, Yu, Yu-Hua, Li
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Selection of sporophytic and gametophytic self-incompatibility in the absence of a superlocus.
Evolution; international journal of organic evolution, 2017Self-incompatibility (SI) is a complex trait that enforces outcrossing in plant populations. SI generally involves tight linkage of genes coding for the proteins that underlie self-pollen detection and pollen identity specification. Here, we develop two-locus genetic models to address the question of whether sporophytic SI (SSI) and gametophytic SI ...
Daniel J, Schoen, Megan J, Roda
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Dioecy Versus Gametophytic Self-Incompatibility: A Test
The American Naturalist, 1984Gregory J. Anderson, G. Ledyard Stebbins
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