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Showing 1 to 20 of 28 for “"self-incompatibility"”.
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SELF-INCOMPATIBILITY IN CHEIRANTHUS ALLIONII
<p>The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a …
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Studies on Self-Incompatibility in Birdsfoot Trefoil, Lotus Corniculatus L
Made available in DSpace on 2014-12-10T17:12:39Z (GMT). No. of bitstreams: 1 6901458.pdf: 6521384 bytes, checksum: 4498cf4dd35b4646252327a75b24b074 (MD5) Previous issue date: 1968
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Investigations of self-incompatibility (SI) in perennial ryegrass (Lolium perenne L.)
… for the temperate zone. It maintains effective self-incompatibility (SI), which promotes outbreeding as well as limits the efficient production of inbred lines and hybrids. SI in L. perenne is controlled by the S and Z loci, mapping to linkage groups 1 and 2, respectively. None of the gene …
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Self-incompatibility in Cosmos atrosanauineus: a rare Mexican endemic species of Asteraceae
… on Cosmos atrosanguineus, a rare Mexican endemic self-incompatible species of Asteraceae that is now believed to be extinct in the wild. The two known wild C. atrosanguineus collections, made in made in the 19th century, localise the species to the pine-oak mountain forest ecological region in two …
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Identification of genes related to self-incompatibility in ryegrass (Lolium perenne L.)
Self-incompatibility (SI) is a mechanism that prevents self-pollination and inbreeding in many flowering plant species. SI in Lolium perenne is controlled by two multi-allelic loci, S and Z. The working of this SImechanism has important consequences for L. perenne breeding as it prevents the …
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Investigating the role of the cytoskeleton and signalling in the self-incompatibility response of Papaver rhoeas
… are hermaphrodite, which poses the problem of self-fertilisation and the subsequent loss of genetic fitness in the offspring. To prevent this, plants have developed a genetically controlled mechanism called self-incompatibility (SI) which allows self (incompatible) pollen to be recognised and …
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Pollination Ecology, Self-incompatibility and Genetic Diversity in the Herbaceous Eastern North American Spring Ephemeral, Erythronium americanum
… were performed to examine pollen limitation and self-incompatibility. Novel molecular markers were developed and used to quantify genetic diversity, clonal diversity, and population structure. Hand pollination treatments (natural, hand supplemented and bagged flowers) showed that smaller …
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Identification of a mitogen-activated protein kinase, p56, which mediates the self-incompatibility response in Papaver rhoeas L.
Self-incompatibility (SI) is the major mechanism used by flowering plants to prevent self-pollination and thus avoid inbreeding. It is a genetically controlled mechanism that encodes a highly specific recognition system that inhibits the growth of incompatible pollen, whereas compatible pollen from …
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Dissecting key biomass traits through traditional QTL mapping, exploring novel functional genomics approaches, and investigating self-incompatibility in Miscanthus
… In order to accomplish this goal, the strong self-incompatibility (SI) mechanism acting in Miscanthus would need to be manipulated. To better understand this mechanism, SI relationships between full siblings of two biparental populations were utilized to map the locus/loci responsible for …
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The evolution of self-compatibility and its genetic consequences in Leavenworthia alabamica (Brassicaceae)
The evolution of self-fertilization from the outcrossing condition is a common transition in flowering plants which strongly alters the genetic structure of populations. In general, it is thought that self-fertilization may evolve in response to its innate transmission advantage or pollen …
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The Genetics, Breeding and Physiology of Parthenocarpy in Lycopersicon Esculentum Mill. (Tomato)
… line was not due to male or female sterility or self-incompatibility. Environments which favor the expression of parthenocarpy act upon the sporophytic rather than the gametophytic tissue of the plant. Morphological studies showed that fertilization and seed formation do not occur during the …
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The evolution and prevalence of reproductive assurance in the genus Lachenalia
… can arise in a multitude of manners, and RA itself takes many forms. Here its evolution and prevalence in the genus Lachenalia (Asparagaceae) is investigated. The genus exhibits many of the characteristics suggested in the literature to be associated with reproductive assurance, including …
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Natural Selection on S-Linked Genes in Turnera (Passifloracease)
… and shows significant sequence homology to known self-incompatibility proteins in Papaver. This study represents the first investigation of the molecular signatures of natural selection on S-linked genes in any heterostylous species. The implications of the results obtained for the elucidation of …
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ΔΙΕΡΕΥΝΗΣΗ ΜΕ ΒΙΟΧΗΜΙΚΕΣ ΜΕΘΟΔΟΥΣ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΤΟΥ ΑΣΥΜΒΙΒΑΣΤΟΥ ΣΤΑ ΟΠΩΡΟΦΟΡΑ ΔΕΝΔΡΑ
THE MECHANISM OF THE SELF INCOMPATIBILITY IN THE REPRODUCTION OF THE FRUIT TREES ALMOND AND SWEET CHERRY WAS INVESTIGATED FROM ITS BIOCHEMICAL ASPECT, AS A FORM OF CELLULAR RECOGNITION BETWEEN POLLEN AND PISTIL. REGARDING THE MORPHOLOGY OF INCOMPATIBILITY IT WAS CONFIRMED THAT IN THE TWO SPECIES IS …
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Can and do Ericas self pollinate?
… was to establish if Erica species can and do self-pollinate. Two Erica species, E. plukenetii and E. urnaviridis, were obtained from Kirstenbosch nursery, where hand-pollinations were performed on 15-20 flowers of each of three treatments (self-pollination, crosspollination and autogamous …
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Identification Of Candidate Genes For Self-Compatibility In A Diploid Population Of Potato Derived From Parents Used In Genome Sequencing
Gametophytic self-incompatibility limits the ability to derive inbred lines of potato through self-pollination and is prevalent in diploid potato. Within a population of F1 hybrids between two genotypes used in potato genome sequencing, we observed fruit set on many greenhouse-grown plants. …
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Variation in breeding systems and consequences for reproductive traits in Erica
… floral traits with a shift from outcrossing to selfing. The aim of this thesis was to determine whether similar changes occur in Erica. I thus analysed breeding systems in Erica in relation to floral traits, pollinators, and fire survivals strategies. Seed and fruit set data obtained from …
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Moth pollination, low seed set, and vestigialization of attractive floral traits in Abronia umbellata (Nyctaginaceae)
… outcross siring success. The transition from self-incompatibility and obligate outcrossing to self-compatibility and predominant selfing is the most common evolutionary transition among the flowering plants and traits associated with outcrossing may become reduced across such shifts, …
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