2 edition of Tetraploid segregation in Antirrhinum majus L. found in the catalog.
Tetraploid segregation in Antirrhinum majus L.
Thomas Morton Little
Written in English
|Statement||by Thomas M. Little.|
|LC Classifications||QK495.S43 L5|
|The Physical Object|
|Pagination||3 p. l.,|
|LC Control Number||a 44000164|
Mohavea is nested within a tetraploid North American clade of Antirrhinum. Thus, Mohavea’s divergent floral morphology is derived from one similar to that ofA. majus (Fig. 2; R. K. Oyama and D.A.B., unpublished data). In A. majus, the genes CYCLOIDEA (AmCYC) and DICHO-TOMA (AmDICH) determine adaxial identity of floral organsCited by: see more details of Antirrhinum majus antirrhinum majus Subject Category: Organism Names see more details and the tetraploid produced from it by colchicine colchicine Subject Category: Chemicals and Chemical Groups see more details treatment. The 4n population, containing a greater proportion of heterozygous plants, was superior in yield as Author: R. Focke.
Results. We created a molecular linkage map of based on segregation of markers in the F2 population of two inbred lab strains of A. resulting map consisted of over markers in eight linkage groups, which could be aligned with a classical recombination map and the A. majus distribution of recombination frequencies and distorted transmission of parental alleles Cited by: A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the g: Tetraploid.
Most tetraploid organisms are fertile because they have four chromosomes. Triploids on the other hand have three chromosomes which make it infertile. The Rosea1, Rosea2, and Venosa genes encode MYB-related transcription factors active in the flowers of Antirrhinum is of mutant phenotypes shows that these genes control the intensity and pattern of magenta anthocyanin pigmentation in flowers. Despite the structural similarity of these regulatory proteins, they influence the expression of target genes encoding the enzymes of Cited by:
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DRUM is brought to you by the University of Maryland Libraries University of Maryland, College Park, MD () Please send us your comments. Web AccessibilityAuthor: Thomas Morton Little.
Tetraploid segregation in Antirrhinum majus L. By Thomas Morton Little Topics: Botany, GeneticsAuthor: Thomas Morton Little. Echinacea purpurea L. is one of the important ornamental and medicinal plant species.
Ploidy manipulation is a valuable tool for improving plant quality or production in E. purpurea as well as in many other plants. To study the segregation of pure ploidy plantlets from colchicine-induced ploidy chimeras in E. purpurea, we used a chimera plantlet that consisted of % diploid, % Cited by: 2.
Segregation Ratios Reference: Mather () • Single genes and no linkage. SEGREGATION IN DIPLOIDS Analysis of single gene segregations–determine what type of genetic control exists for a single trait–i.e., single gene dominant, codominant, two genes with partial dominance, etc.
• Need single genes in order to conduct linkage Size: KB. Snapdragon (Antirrhinum majus L.), a member of the Plantaginaceae family, is an important model for plant genetics and molecular studies on plant growth and development, transposon biology and.
Diploid and tetraploid seedlings of snapdragons (Antirrhinum majus) were irradiated with increasing exposures of X-rays and then scored several weeks later for apical and non-apical (adventitious) proliferation.
Apical and non-apical proliferation were eliminated in both strains with exposures of 8 kR and 14 kR, by: 4. classes of morphogenetic mutants are known in Antirrhinum that could be usefial for analysis of the molecular processes underlying floral development (I0, 11).
Nakao and Uemoto () reported that the degree of pigmentation in the tetraploid red-flowered snapdragon (Antirrhinum majus L.) showed a definite factor-dosage effect as compared with its corresponding diploid, and that the amount of antirrhinin (cyanidin- 3-rahmnoglucoside) and aureusin (aureusidinglucoside) in the tetraploid was higher Cited by: One-centimeter hypocotyl explants from 2-week-old Antirrhinum majus L.
(snapdragon) seedlings germinated and grown in vitro under h cool-white fluorescent light and 12 h dark or 24 h dark were.
the tetraploid Antirrhinum majus L. ‘Tetra Giant’ (4 x = 32) (Tolety and Sane ), the triploid ‘Navona’ (3 x = 36) and the tetraploids ‘Val di Sole’. The diploid cells would fuse creating a tetraploid cell with 92 chromosomes. If two tetraploid cells fused, you would then have an octopoid cell with chromosomes and so forth.
Atkinson NJ, Ford-Lloyd BV, Newbury HJ () Regeneration of plants from Antirrhinum majus L. callus. Plant Cell Tissue Organ Cult 59–70 Google Scholar Bradley D, Vincent C, Carpenter R, Coen E () Pathways for inflorescence and floral induction in by: 1.
Isolation of the DNA sequence related to A. majus centromeres. Repetitive DNA elements often provide characteristic cytological landmarks for karyotyping. To isolate repetitive DNA elements, we screened an Antirrhinum BAC library (L ai et al.
) using sheared A. majus genomic DNA as a probe.A total of 50 positive clones showing strong hybridization signals were selected and labeled as FISH Cited by: Thomas Morton Little has written: 'Tetraploid segregation in Antirrhinum majus L' -- subject(s): Karyokinesis, Snapdragons.
Meiosis of haploid forms ofAntirrhinum majus L. (n = 8) is characterized by an extremely high degree of pairing between inhomologous or partially homologous chromosomes.
In extreme cases this pairing leads to the formation of four bivalents. Besides bivalents trivalents and more complex pairing configurations were found in by: The role of multiple reproductive barriers: Strong post-pollination interactions govern cytotype isolation in a tetraploid-octoploid contact zone Time-resolved laboratory µ-XRF reveals silicon distribution in relation to manganese toxicity in soybean and sunflower.
Thomas Morton Little has written: 'Tetraploid segregation in Antirrhinum majus L' -- subject(s): Karyokinesis, Snapdragons Asked in Canterbury Tales Where are the pilgrims traveling to in The.
Three main theories of autotetraploid segregation have been propounded, the Muller hypothesis based on the random assortment of chromosomes at meiosis, the Haldane hypothesis based on the random assortment of chromatids, and the Mather hypothesis in which the ratios are considered to be not fixed but varying according to the amount of quadrivalent formation and the distance of a gene Cited by: Pollen of Antirrhinum majus was irradiated with radiowaves (γ = m; field strength V/m) in 3 series for 4, 12 and 43 3 4 h, then crossed on styles of emasculated untreated flowers.
After selfing of the M 1 generation an increase in embryonic lethality and in mutations for characters of the seedlings and young plants was observed.
These observations confirmed the mutagenic action of the Cited by: 2. A protocol for transformation and regeneration of Antirrhinum majus Article in The Plant Journal 13(5) - January with 52 Reads How we measure 'reads'.
Shifts in flower symmetry have occurred frequently during the diversification of angiosperms, and it is thought that such shifts play important roles in plant–pollinator interactions. In the model developmental system Antirrhinum majus (snapdragon), the closely related genes CYCLOIDEA (CYC) and DICHOTOMA (DICH) are needed for the development of zygomorphic flowers and the Cited by: TheSfm system of gene control inAntirrhinum majus.
K. M. Aslam Pages Non-random chloroplast segregation inNicotiana tabacum A test of the maximum heterozygosity hypothesis using molecular markers in tetraploid potatoes.
M. W. Bonierbale, R. L. Correlated variation in shape and size (allometry) is a major component of natural diversity.
We examined the evolutionary and genetic basis for allometry using leaves and flower petals of snapdragon species (Antirrhinum). A computational method was developed to capture shape and size variation in both types of organ within the Antirrhinum species by: