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Showing 1 to 20 of 78 for “"tetraploid"”.
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Corydoras aeneus: a diploid-tetraploid fish species complex
… this species of fish showed that C. aeneus is a tetraploid with a chromosome number of 132 (Scheel et al. , 1972). Dunham et al. (1980) reported 120 chromosomes. The C. aeneus used in this study were bought from direct importers. We had four samples of fishes supposedly coming from Brazil …
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Cytogenetic Studies of Tetraploid Hybrids of Euchlaena Perennis and Zea Mays
Made available in DSpace on 2014-12-05T22:00:11Z (GMT). No. of bitstreams: 1 6003994.pdf: 4071263 bytes, checksum: 4a0d87e35f5e30529d65da9ff1b2fd8f (MD5) Previous issue date: 1960
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The evolution of centrosome and chromosome number in newly formed tetraploid human cells
Tetraploidy – the presence of four copies of the haploid chromosome complement – is common in cancer. There is evidence that ~40% of tumors pass through a tetraploid stage at some point during their development, and tetraploid cells injected in mice are more tumorigenic than their diploid …
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A Study of the Seedlings From Controlled Cross-Pollinations of Certain Tetraploid Apple Varieties
Made available in DSpace on 2014-12-04T19:49:23Z (GMT). No. of bitstreams: 1 0015198.pdf: 2893651 bytes, checksum: 27b20245dc7b203aab977441db7e280c (MD5) Previous issue date: 1955
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Cytomorphological Studies of Hybrids Between Maize and Tetraploid Tripsacum Dactyloides (L.) L. And Their Backcross Derivatives
Made available in DSpace on 2014-12-10T17:12:49Z (GMT). No. of bitstreams: 1 7021023.pdf: 2691565 bytes, checksum: c1ab8f3f00284c1632e5425e3f5a3943 (MD5) Previous issue date: 1970
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Inheritance and expression of Cry3Aa and PVY-O coat protein transgenes in diploid and tetraploid potato
The potential benefits of plant genetic engineering for disease and pest resistance have been widely acknowledged in many studies, and although genetically modified crops are still encountering public wariness, these benefits warrant continued exploration. Because of its intrinsic economic …
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The Growth and Development of Embryo and Endosperm in Relation to Seed Abortion in Certain Tetraploid Apples
Made available in DSpace on 2014-12-04T19:49:25Z (GMT). No. of bitstreams: 1 5901999.pdf: 2832514 bytes, checksum: be440b02ba7af9b66fb52173dfe5c278 (MD5) Previous issue date: 1959
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Effect of Harvest Time on the Incidence of Red Drupelet Reversion and Development of Tetraploid Linkage Maps in Blackberry
… The cultivated blackberry is an autotetraploid where there are four sets of homologous chromosomes that follow a multisomic pattern of inheritance. As a result, blackberries have high heterozygosity and lack saturated molecular maps reliable for gene discovery. An F1 population and …
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Linkage mapping in tetraploid blackberry (Rubus spp.) using high-throughput genomic sequencing and restriction-site associated DNA sequencing (RAD-seq)
… Traditional techniques for studying linkage in tetraploid species, including Rubus, have made use of limited numbers of scorable markers – such as expressed sequence tag simple sequence repeats (EST-SSRs) or amplified fragment length polymorphisms (ALFPs) – and large mapping populations …
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Isolation and Characterization of Regulatory Peptides from Two Tetraploid Species, the Pallid Sturgeon, Scaphirhynchus albus, and the African Clawed Frog, Xenopus laevis
Tetraploidization, the duplication of the entire genome of an organism, results in twice the number of each gene present in the original diploid genome. Over time, the multiple copies of a single gene may accumulate different mutations and produce proteins or peptides with differences in their …
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ΗΛΕΚΤΡΟΦΟΡΗΤΙΚΗ ΠΟΙΚΙΛΟΤΗΤΑ ΣΤΙΣ ΕΣΤΕΡΑΣΕΣ, ΥΠΕΡΟΞΕΙΔΑΣΕΣ ΚΑΙ ΟΞΙΝΕΣ ΦΩΣΦΑΤΑΣΕΣΣΕ ΜΕΡΙΚΑ ΑΥΤΟΦΥΗ ΕΛΛΗΝΙΚΑ ΕΙΔΗ ΤΩΝ ΓΕΝΩΝ HORDEUM ΚΑΙ ΤΑΕΝΙATHERUM
… (H. MARINUM, H. MARINUM I, H. HUSTRIX); (2) TETRAPLOID HORDEUM (H. BULBOSUM, H. MURINUM SUBSP. LEPORINUM);(3) TAENIATHERUM (T. CAPUT-MEDUSAE, T. CAPUT-MEDUSAE I). ESTERASE PEROXIDASEAND ACID PHOSPHATASE PATTERNS OF THE DIPLOID HORDEUM TAXA ARE VERY SIMILAR SUGGESTING THEIR CLOSE PHYLOGENETIC …
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Use of monoploid solanum phureja in cell and tissue culture techniques for potato improvement
… demonstrated variability among diploid and tetraploid calliclones of one monoploid genotype for total protein banding pattern. Absence of stainable pollen and lack of seed set after crosses to diploid species and tetraploid cultivars illustrated infertility among doubled (2n = 2x = 24) and …
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Whole genome doubling confers unique genetic vulnerabilities on tumor cells
… doubling (WGD) generates genetically unstable tetraploid cells that fuel tumorigenesis. Cells that undergo WGD must acquire adaptive characteristics to accommodate their tetraploid state, and these adaptations may confer unique vulnerabilities that can be exploited therapeutically. We analyzed …
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Polyploidy in Saccharomyces cerevisiae leads to the loss of cell cycle control in stationary phase
… that remain viable for weeks and even months, tetraploid yeast are completely inviable after approximately 10-15 days in synthetic media. Analysis of the growth patterns of haploid and tetraploid cells during stationary phase reveals that tetraploids are defective for growth arrest during …
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Capturing Photosynthetic Traits from the Progenitors of Wheat
… mesophyll conductance. Progeny formed through tetraploid and hexaploid crossing carried introgressions from these T. dicoccoides and were screened in a subsequent field trial. Although per unit CO2 assimilation was increased in the progeny, flag leaf area was decreased, leading to an overall …
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Tripsacum-X-Maize Hybrids in Tripsacum Cytoplasm
F$\sb1$ hybrids between tetraploid Tripsacum dactyloides (2n = 72) and diploid maize (2n = 20) were produced containing 82 chromosomes (72Td + 10Zm) in Tripsacum cytoplasm. Four backcrosses, with maize as the recurrent parent, produced an array of chromosomal types. The most common pathway for …
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Genetic Diversity in Native and Invasive <i>Rubus </i>(Rosaceae)
… species were chosen to represent apomictic and tetraploid invasives (Rubus armeniacus), a sexual and diploid native species (R. occidentalis), and a sexual and diploid invasive species (R. phoenicolasius). Specimens were collected across the U.S. and two different genetic fingerprinting …
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Linkage mapping in prairie cordgrass (Spartina pectinata Link) using genotyping-by-sequencing markers
… pectinata) is a polyploid Chloridoid grass with tetraploid (2n=4X=40), hexaploid (2n=6X=60), and octaploid (2n=8X=80) cytotypes, and is a potential dedicated energy crop with promising yields in marginal environments. Breeding efforts in prairie cordgrass are currently hampered by the lack of a …
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The influence of N, P, K, lime and other factors affecting the growth of container-grown freesia : A thesis submitted in partial fulfilment of the requirements for the degree of Master of Horticultural Science in the University of Canterbury [Lincoln College]
… lime) on the growth and flowering of tetraploid freesias. 2. The effect of magnesium (Mg) on growth. 3. The influence of density and shade on freesia development. 4. The effect of the hormone kinetin. 5. Growth and flowering as affected by seed strain.
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Analysis of anther-derived plants of Solanum phureja: variation in ploidy, photosynthetic efficiency and structure of the nuclear genome
… further breeding efforts, monoploid, diploid and tetraploid anther-derived plants were studied regarding their net photosynthesis and its component characteristics. Leaf area, net photosynthesis and chlorophyll content increased with increasing ploidy' Among .the. monoploids I. Rubisco activity …
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