Results 151 to 160 of about 4,481,792 (185)

Gametophytic self-incompatibility in Maxillariinae orchids

Protoplasma, 2023
Gametophytic 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, João Pedro Silvério Pena Bento, Juliana Lischka Sampaio Mayer, Rodrigo Bustos Singer, Samantha Koehler   +4 more
openaire   +2 more sources

Evidence for rare recombination at the gametophytic self-incompatibility locus [PDF]

Heredity, 2003
The gametophytic self-incompatibility locus has been thought to be a nonrecombining genomic region. Inferences have been made, however, about the functional importance of different parts of the S-locus, based on differences in the levels of variability along the gene, and this is valid only if recombination occurs.
Jorge Vieira, Deborah Charlesworth, Cristina Vieira   +2 more
exaly   +3 more sources

Linkage disequilibrium and gametophytic self-incompatibility

Theoretical and Applied Genetics, 1986
The 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.
O Mayo, C R Leach
exaly   +3 more sources

Gametophytic Self-Incompatibility in Petunia

2009
Gametophytic 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
openaire   +1 more source

Sporophytic and Gametophytic Self-Incompatibility

1992
In 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, H. Kirch, T. Wemmer, A. Peil, F. Lottspeich, H. Uhrig, F. Salamini, R. Thompson   +7 more
openaire   +1 more source

Molecular Analysis of Gametophytic Self-Incompatibility

1992
The 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, Helgard Kaufmann, Thomas Wemmer, Junqi Liu, Richard D. Thompson   +4 more
openaire   +1 more source

Gametophytic self-incompatibility: contrasting mechanisms for Nicotiana and Papaver

Trends in Cell Biology, 1993
Since 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
openaire   +2 more sources

Gametophytic self-incompatibility in Nicotiana alata

1994
Self-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, Marilyn A. Anderson, Adrienne E. Clarke   +2 more
openaire   +1 more source

Gametophytic self-incompatibility inPapaver rhoeas L.

Sexual Plant Reproduction, 1992
We 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, F. Christopher H. Franklin   +1 more
openaire   +1 more source

Molecular Mechanisms Underlying The Breakdown Of Gametophytic Self‐incompatibility

The Quarterly Review of Biology, 2002
The 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 ...
openaire   +2 more sources