Results 151 to 160 of about 2,115 (184)
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Gametophytic Self-Incompatibility Reexamined
Science, 1983The conventional hypothesis of gametophytic self-incompatibility in the angiosperms involves one to four multiallelic incompatibility loci and the positive inhibition of incompatible pollen tubes. However, this concept does not accommodate recent experimental data indicating that there may be many loci. An alternative hypothesis which incorporates many
David L Mulcahy +1 more
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Pollen transfer dynamics and the evolution of gametophytic self-incompatibility
Journal of Evolutionary Biology, 1999Abstract Recent studies of mating system evolution have attempted to include aspects of pollination biology in analysis of both theoretical models and experimental systems. In light of this growing trend, we propose a simple population genetic model for the evolution of gametophytic self-incompatibility, incorporating parameters for ...
null Steinbachs, null HolSinger
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Gametophytic self-incompatibility in eudicots
, 2017 The S-RNase based gametophytic self-incompatibility (GSI) system is a genetic mechanism present in Solanaceae, Plantaginaceae, Rosaceae, and Rubiaceae, that prevents self-fertilization. This system emerged before the split between Asteridae and Rosidae, about 120 million years ago (MYa), and thus, it is expected to be present in many self-incompatible (
Teixeira, Vanessa Maria Alves
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Gametophytic self-incompatibility in Maxillariinae orchids
Protoplasma, 2023Gametophytic self-incompatibility (GSI) has been mainly described in species-rich clades within Orchidaceae. We report GSI for a genus within Maxillariinae, one of the most conspicuous and diverse subtribes of neotropical orchids. Here, we describe the reproductive system of Brasiliorchis picta, B. phoenicanthera, and B. porphyrostele.
Nícolas Alberto Polizelli Ricci +4 more
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Linkage disequilibrium and gametophytic self-incompatibility
Theoretical and Applied Genetics, 1986The approach to linkage equilibrium of a locus linked to the locus determining gametophytic self-incompatibility (S) is considered. For the simplest case of three alleles at the S locus and two at the linked locus it is necessary to consider 3 measures of linkage disequilibrium.
C R, Leach, O, Mayo, M M, Morris
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Gametophytic self-incompatibility: contrasting mechanisms for Nicotiana and Papaver
Trends in Cell Biology, 1993Since Darwin first noted that not all plants produce self-seed, several mechanisms that regulate the acceptance or rejection of pollen during fertilization have been recognized, of which self-incompatibility (SI) is the most widespread. Over the past few years much progress has been made in understanding the molecular and cellular processes involved in
N, Franklin-Tong, C, Franklin
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Gametophytic Self-Incompatibility in Petunia
2009Gametophytic self-incompatibility (GSI), which prevents growth of a pollen tube through the style, provides a means of preventing self-pollination. Seen in most eudicot plant families, GSI in the genus Petunia was described by Darwin in the 19th century. By the time the first edition of this monograph was published in 1984, nearly a century later, most
Thomas L. Sims, Timothy P. Robbins
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Sporophytic and Gametophytic Self-Incompatibility
1992In this article the main features of the best-studied self- incompatibility (SI) systems will be summarized (see also Nasrallah and Nasrallah 1989, and Harings et al. 1991), followed by a more detailed description of potato pistil proteins and their possible role in SI.
H. Kaufmann +7 more
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Gametophytic self-incompatibility inPapaver rhoeas L.
Sexual Plant Reproduction, 1992We have developed an in vitro system whereby we can reproduce the self-incompatibility (SI) reactions ofP. rhoeas in pollen grown in vitro, using stigmatic extracts. This has enabled us to investigate a number of aspects of SI, which would otherwise be difficult. On the stigma side of the reaction, the in vitro system has enabled us to characterize and
Vernonica E. Franklin-Tong +1 more
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Molecular Analysis of Gametophytic Self-Incompatibility
1992The control of gametophytic self-incompatibility as exhibited in most plant species is exerted through the action of a single locus S. When haploid pollen grains genotype Sx alight on a style expressing the same S allele, fertilization is prevented, whereas pollen grains whose S-alleles are not matched by those expressed in the style grow, and ...
Hans-Hubert Kirch +4 more
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